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clang-p2996/llvm/test/Transforms/LoopVectorize/loop-form.ll
Florian Hahn e90d55e1c9 [VPlan] Support sinking recipes with uniform users outside sink target. 
This is a first step towards addressing the last remaining limitation of
the VPlan version of sinkScalarOperands: the legacy version can
partially sink operands. For example, if a GEP has uniform users outside
the sink target block, then the legacy version will sink all scalar
GEPs, other than the one for lane 0.

This patch works towards addressing this case in the VPlan version by
detecting such cases and duplicating the sink candidate. All users
outside of the sink target will be updated to use the uniform clone.

Note that this highlights an issue with VPValue naming. If we duplicate
a replicate recipe, they will share the same underlying IR value and
both VPValues will have the same name ir<%gep>.

Reviewed By: Ayal

Differential Revision: https://reviews.llvm.org/D104254
2021-09-15 09:21:39 +01:00

1292 lines
59 KiB
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; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
; RUN: opt -S -loop-vectorize -force-vector-width=2 < %s | FileCheck %s
; RUN: opt -S -loop-vectorize -force-vector-width=2 -prefer-predicate-over-epilogue=predicate-dont-vectorize < %s | FileCheck --check-prefix TAILFOLD %s
target datalayout = "e-m:o-i64:64-f80:128-n8:16:32:64-S128"
define void @bottom_tested(i16* %p, i32 %n) {
; CHECK-LABEL: @bottom_tested(
; CHECK-NEXT: entry:
; CHECK-NEXT: [[SMAX:%.*]] = call i32 @llvm.smax.i32(i32 [[N:%.*]], i32 0)
; CHECK-NEXT: [[TMP0:%.*]] = add nuw i32 [[SMAX]], 1
; CHECK-NEXT: [[MIN_ITERS_CHECK:%.*]] = icmp ult i32 [[TMP0]], 2
; CHECK-NEXT: br i1 [[MIN_ITERS_CHECK]], label [[SCALAR_PH:%.*]], label [[VECTOR_PH:%.*]]
; CHECK: vector.ph:
; CHECK-NEXT: [[N_MOD_VF:%.*]] = urem i32 [[TMP0]], 2
; CHECK-NEXT: [[N_VEC:%.*]] = sub i32 [[TMP0]], [[N_MOD_VF]]
; CHECK-NEXT: br label [[VECTOR_BODY:%.*]]
; CHECK: vector.body:
; CHECK-NEXT: [[INDEX:%.*]] = phi i32 [ 0, [[VECTOR_PH]] ], [ [[INDEX_NEXT:%.*]], [[VECTOR_BODY]] ]
; CHECK-NEXT: [[TMP1:%.*]] = add i32 [[INDEX]], 0
; CHECK-NEXT: [[TMP2:%.*]] = sext i32 [[TMP1]] to i64
; CHECK-NEXT: [[TMP3:%.*]] = getelementptr inbounds i16, i16* [[P:%.*]], i64 [[TMP2]]
; CHECK-NEXT: [[TMP4:%.*]] = getelementptr inbounds i16, i16* [[TMP3]], i32 0
; CHECK-NEXT: [[TMP5:%.*]] = bitcast i16* [[TMP4]] to <2 x i16>*
; CHECK-NEXT: store <2 x i16> zeroinitializer, <2 x i16>* [[TMP5]], align 4
; CHECK-NEXT: [[INDEX_NEXT]] = add nuw i32 [[INDEX]], 2
; CHECK-NEXT: [[TMP6:%.*]] = icmp eq i32 [[INDEX_NEXT]], [[N_VEC]]
; CHECK-NEXT: br i1 [[TMP6]], label [[MIDDLE_BLOCK:%.*]], label [[VECTOR_BODY]], !llvm.loop [[LOOP0:![0-9]+]]
; CHECK: middle.block:
; CHECK-NEXT: [[CMP_N:%.*]] = icmp eq i32 [[TMP0]], [[N_VEC]]
; CHECK-NEXT: br i1 [[CMP_N]], label [[IF_END:%.*]], label [[SCALAR_PH]]
; CHECK: scalar.ph:
; CHECK-NEXT: [[BC_RESUME_VAL:%.*]] = phi i32 [ [[N_VEC]], [[MIDDLE_BLOCK]] ], [ 0, [[ENTRY:%.*]] ]
; CHECK-NEXT: br label [[FOR_COND:%.*]]
; CHECK: for.cond:
; CHECK-NEXT: [[I:%.*]] = phi i32 [ [[BC_RESUME_VAL]], [[SCALAR_PH]] ], [ [[INC:%.*]], [[FOR_COND]] ]
; CHECK-NEXT: [[IPROM:%.*]] = sext i32 [[I]] to i64
; CHECK-NEXT: [[B:%.*]] = getelementptr inbounds i16, i16* [[P]], i64 [[IPROM]]
; CHECK-NEXT: store i16 0, i16* [[B]], align 4
; CHECK-NEXT: [[INC]] = add nsw i32 [[I]], 1
; CHECK-NEXT: [[CMP:%.*]] = icmp slt i32 [[I]], [[N]]
; CHECK-NEXT: br i1 [[CMP]], label [[FOR_COND]], label [[IF_END]], !llvm.loop [[LOOP2:![0-9]+]]
; CHECK: if.end:
; CHECK-NEXT: ret void
;
; TAILFOLD-LABEL: @bottom_tested(
; TAILFOLD-NEXT: entry:
; TAILFOLD-NEXT: [[SMAX:%.*]] = call i32 @llvm.smax.i32(i32 [[N:%.*]], i32 0)
; TAILFOLD-NEXT: [[TMP0:%.*]] = add nuw i32 [[SMAX]], 1
; TAILFOLD-NEXT: br i1 false, label [[SCALAR_PH:%.*]], label [[VECTOR_PH:%.*]]
; TAILFOLD: vector.ph:
; TAILFOLD-NEXT: [[N_RND_UP:%.*]] = add i32 [[TMP0]], 1
; TAILFOLD-NEXT: [[N_MOD_VF:%.*]] = urem i32 [[N_RND_UP]], 2
; TAILFOLD-NEXT: [[N_VEC:%.*]] = sub i32 [[N_RND_UP]], [[N_MOD_VF]]
; TAILFOLD-NEXT: [[TRIP_COUNT_MINUS_1:%.*]] = sub i32 [[TMP0]], 1
; TAILFOLD-NEXT: [[BROADCAST_SPLATINSERT:%.*]] = insertelement <2 x i32> poison, i32 [[TRIP_COUNT_MINUS_1]], i32 0
; TAILFOLD-NEXT: [[BROADCAST_SPLAT:%.*]] = shufflevector <2 x i32> [[BROADCAST_SPLATINSERT]], <2 x i32> poison, <2 x i32> zeroinitializer
; TAILFOLD-NEXT: br label [[VECTOR_BODY:%.*]]
; TAILFOLD: vector.body:
; TAILFOLD-NEXT: [[INDEX:%.*]] = phi i32 [ 0, [[VECTOR_PH]] ], [ [[INDEX_NEXT:%.*]], [[PRED_STORE_CONTINUE2:%.*]] ]
; TAILFOLD-NEXT: [[VEC_IND:%.*]] = phi <2 x i32> [ <i32 0, i32 1>, [[VECTOR_PH]] ], [ [[VEC_IND_NEXT:%.*]], [[PRED_STORE_CONTINUE2]] ]
; TAILFOLD-NEXT: [[TMP1:%.*]] = add i32 [[INDEX]], 0
; TAILFOLD-NEXT: [[TMP2:%.*]] = add i32 [[INDEX]], 1
; TAILFOLD-NEXT: [[TMP3:%.*]] = icmp ule <2 x i32> [[VEC_IND]], [[BROADCAST_SPLAT]]
; TAILFOLD-NEXT: [[TMP4:%.*]] = sext <2 x i32> [[VEC_IND]] to <2 x i64>
; TAILFOLD-NEXT: [[TMP5:%.*]] = extractelement <2 x i1> [[TMP3]], i32 0
; TAILFOLD-NEXT: br i1 [[TMP5]], label [[PRED_STORE_IF:%.*]], label [[PRED_STORE_CONTINUE:%.*]]
; TAILFOLD: pred.store.if:
; TAILFOLD-NEXT: [[TMP6:%.*]] = extractelement <2 x i64> [[TMP4]], i32 0
; TAILFOLD-NEXT: [[TMP7:%.*]] = getelementptr inbounds i16, i16* [[P:%.*]], i64 [[TMP6]]
; TAILFOLD-NEXT: store i16 0, i16* [[TMP7]], align 4
; TAILFOLD-NEXT: br label [[PRED_STORE_CONTINUE]]
; TAILFOLD: pred.store.continue:
; TAILFOLD-NEXT: [[TMP8:%.*]] = extractelement <2 x i1> [[TMP3]], i32 1
; TAILFOLD-NEXT: br i1 [[TMP8]], label [[PRED_STORE_IF1:%.*]], label [[PRED_STORE_CONTINUE2]]
; TAILFOLD: pred.store.if1:
; TAILFOLD-NEXT: [[TMP9:%.*]] = extractelement <2 x i64> [[TMP4]], i32 1
; TAILFOLD-NEXT: [[TMP10:%.*]] = getelementptr inbounds i16, i16* [[P]], i64 [[TMP9]]
; TAILFOLD-NEXT: store i16 0, i16* [[TMP10]], align 4
; TAILFOLD-NEXT: br label [[PRED_STORE_CONTINUE2]]
; TAILFOLD: pred.store.continue2:
; TAILFOLD-NEXT: [[INDEX_NEXT]] = add i32 [[INDEX]], 2
; TAILFOLD-NEXT: [[VEC_IND_NEXT]] = add <2 x i32> [[VEC_IND]], <i32 2, i32 2>
; TAILFOLD-NEXT: [[TMP11:%.*]] = icmp eq i32 [[INDEX_NEXT]], [[N_VEC]]
; TAILFOLD-NEXT: br i1 [[TMP11]], label [[MIDDLE_BLOCK:%.*]], label [[VECTOR_BODY]], !llvm.loop [[LOOP0:![0-9]+]]
; TAILFOLD: middle.block:
; TAILFOLD-NEXT: br i1 true, label [[IF_END:%.*]], label [[SCALAR_PH]]
; TAILFOLD: scalar.ph:
; TAILFOLD-NEXT: [[BC_RESUME_VAL:%.*]] = phi i32 [ [[N_VEC]], [[MIDDLE_BLOCK]] ], [ 0, [[ENTRY:%.*]] ]
; TAILFOLD-NEXT: br label [[FOR_COND:%.*]]
; TAILFOLD: for.cond:
; TAILFOLD-NEXT: [[I:%.*]] = phi i32 [ [[BC_RESUME_VAL]], [[SCALAR_PH]] ], [ [[INC:%.*]], [[FOR_COND]] ]
; TAILFOLD-NEXT: [[IPROM:%.*]] = sext i32 [[I]] to i64
; TAILFOLD-NEXT: [[B:%.*]] = getelementptr inbounds i16, i16* [[P]], i64 [[IPROM]]
; TAILFOLD-NEXT: store i16 0, i16* [[B]], align 4
; TAILFOLD-NEXT: [[INC]] = add nsw i32 [[I]], 1
; TAILFOLD-NEXT: [[CMP:%.*]] = icmp slt i32 [[I]], [[N]]
; TAILFOLD-NEXT: br i1 [[CMP]], label [[FOR_COND]], label [[IF_END]], !llvm.loop [[LOOP2:![0-9]+]]
; TAILFOLD: if.end:
; TAILFOLD-NEXT: ret void
;
entry:
br label %for.cond
for.cond:
%i = phi i32 [ 0, %entry ], [ %inc, %for.cond ]
%iprom = sext i32 %i to i64
%b = getelementptr inbounds i16, i16* %p, i64 %iprom
store i16 0, i16* %b, align 4
%inc = add nsw i32 %i, 1
%cmp = icmp slt i32 %i, %n
br i1 %cmp, label %for.cond, label %if.end
if.end:
ret void
}
define void @early_exit(i16* %p, i32 %n) {
; CHECK-LABEL: @early_exit(
; CHECK-NEXT: entry:
; CHECK-NEXT: [[SMAX:%.*]] = call i32 @llvm.smax.i32(i32 [[N:%.*]], i32 0)
; CHECK-NEXT: [[TMP0:%.*]] = add nuw i32 [[SMAX]], 1
; CHECK-NEXT: [[MIN_ITERS_CHECK:%.*]] = icmp ule i32 [[TMP0]], 2
; CHECK-NEXT: br i1 [[MIN_ITERS_CHECK]], label [[SCALAR_PH:%.*]], label [[VECTOR_PH:%.*]]
; CHECK: vector.ph:
; CHECK-NEXT: [[N_MOD_VF:%.*]] = urem i32 [[TMP0]], 2
; CHECK-NEXT: [[TMP1:%.*]] = icmp eq i32 [[N_MOD_VF]], 0
; CHECK-NEXT: [[TMP2:%.*]] = select i1 [[TMP1]], i32 2, i32 [[N_MOD_VF]]
; CHECK-NEXT: [[N_VEC:%.*]] = sub i32 [[TMP0]], [[TMP2]]
; CHECK-NEXT: br label [[VECTOR_BODY:%.*]]
; CHECK: vector.body:
; CHECK-NEXT: [[INDEX:%.*]] = phi i32 [ 0, [[VECTOR_PH]] ], [ [[INDEX_NEXT:%.*]], [[VECTOR_BODY]] ]
; CHECK-NEXT: [[VEC_IND:%.*]] = phi <2 x i32> [ <i32 0, i32 1>, [[VECTOR_PH]] ], [ [[VEC_IND_NEXT:%.*]], [[VECTOR_BODY]] ]
; CHECK-NEXT: [[TMP3:%.*]] = add i32 [[INDEX]], 0
; CHECK-NEXT: [[TMP4:%.*]] = add i32 [[INDEX]], 1
; CHECK-NEXT: [[TMP5:%.*]] = sext i32 [[TMP3]] to i64
; CHECK-NEXT: [[TMP6:%.*]] = getelementptr inbounds i16, i16* [[P:%.*]], i64 [[TMP5]]
; CHECK-NEXT: [[TMP7:%.*]] = getelementptr inbounds i16, i16* [[TMP6]], i32 0
; CHECK-NEXT: [[TMP8:%.*]] = bitcast i16* [[TMP7]] to <2 x i16>*
; CHECK-NEXT: store <2 x i16> zeroinitializer, <2 x i16>* [[TMP8]], align 4
; CHECK-NEXT: [[INDEX_NEXT]] = add nuw i32 [[INDEX]], 2
; CHECK-NEXT: [[VEC_IND_NEXT]] = add <2 x i32> [[VEC_IND]], <i32 2, i32 2>
; CHECK-NEXT: [[TMP9:%.*]] = icmp eq i32 [[INDEX_NEXT]], [[N_VEC]]
; CHECK-NEXT: br i1 [[TMP9]], label [[MIDDLE_BLOCK:%.*]], label [[VECTOR_BODY]], !llvm.loop [[LOOP4:![0-9]+]]
; CHECK: middle.block:
; CHECK-NEXT: br label [[SCALAR_PH]]
; CHECK: scalar.ph:
; CHECK-NEXT: [[BC_RESUME_VAL:%.*]] = phi i32 [ [[N_VEC]], [[MIDDLE_BLOCK]] ], [ 0, [[ENTRY:%.*]] ]
; CHECK-NEXT: br label [[FOR_COND:%.*]]
; CHECK: for.cond:
; CHECK-NEXT: [[I:%.*]] = phi i32 [ [[BC_RESUME_VAL]], [[SCALAR_PH]] ], [ [[INC:%.*]], [[FOR_BODY:%.*]] ]
; CHECK-NEXT: [[CMP:%.*]] = icmp slt i32 [[I]], [[N]]
; CHECK-NEXT: br i1 [[CMP]], label [[FOR_BODY]], label [[IF_END:%.*]]
; CHECK: for.body:
; CHECK-NEXT: [[IPROM:%.*]] = sext i32 [[I]] to i64
; CHECK-NEXT: [[B:%.*]] = getelementptr inbounds i16, i16* [[P]], i64 [[IPROM]]
; CHECK-NEXT: store i16 0, i16* [[B]], align 4
; CHECK-NEXT: [[INC]] = add nsw i32 [[I]], 1
; CHECK-NEXT: br label [[FOR_COND]], !llvm.loop [[LOOP5:![0-9]+]]
; CHECK: if.end:
; CHECK-NEXT: ret void
;
; TAILFOLD-LABEL: @early_exit(
; TAILFOLD-NEXT: entry:
; TAILFOLD-NEXT: br label [[FOR_COND:%.*]]
; TAILFOLD: for.cond:
; TAILFOLD-NEXT: [[I:%.*]] = phi i32 [ 0, [[ENTRY:%.*]] ], [ [[INC:%.*]], [[FOR_BODY:%.*]] ]
; TAILFOLD-NEXT: [[CMP:%.*]] = icmp slt i32 [[I]], [[N:%.*]]
; TAILFOLD-NEXT: br i1 [[CMP]], label [[FOR_BODY]], label [[IF_END:%.*]]
; TAILFOLD: for.body:
; TAILFOLD-NEXT: [[IPROM:%.*]] = sext i32 [[I]] to i64
; TAILFOLD-NEXT: [[B:%.*]] = getelementptr inbounds i16, i16* [[P:%.*]], i64 [[IPROM]]
; TAILFOLD-NEXT: store i16 0, i16* [[B]], align 4
; TAILFOLD-NEXT: [[INC]] = add nsw i32 [[I]], 1
; TAILFOLD-NEXT: br label [[FOR_COND]]
; TAILFOLD: if.end:
; TAILFOLD-NEXT: ret void
;
entry:
br label %for.cond
for.cond:
%i = phi i32 [ 0, %entry ], [ %inc, %for.body ]
%cmp = icmp slt i32 %i, %n
br i1 %cmp, label %for.body, label %if.end
for.body:
%iprom = sext i32 %i to i64
%b = getelementptr inbounds i16, i16* %p, i64 %iprom
store i16 0, i16* %b, align 4
%inc = add nsw i32 %i, 1
br label %for.cond
if.end:
ret void
}
; Same as early_exit, but with optsize to prevent the use of
; a scalar epilogue. -- Can't vectorize this in either case.
define void @optsize(i16* %p, i32 %n) optsize {
; CHECK-LABEL: @optsize(
; CHECK-NEXT: entry:
; CHECK-NEXT: br label [[FOR_COND:%.*]]
; CHECK: for.cond:
; CHECK-NEXT: [[I:%.*]] = phi i32 [ 0, [[ENTRY:%.*]] ], [ [[INC:%.*]], [[FOR_BODY:%.*]] ]
; CHECK-NEXT: [[CMP:%.*]] = icmp slt i32 [[I]], [[N:%.*]]
; CHECK-NEXT: br i1 [[CMP]], label [[FOR_BODY]], label [[IF_END:%.*]]
; CHECK: for.body:
; CHECK-NEXT: [[IPROM:%.*]] = sext i32 [[I]] to i64
; CHECK-NEXT: [[B:%.*]] = getelementptr inbounds i16, i16* [[P:%.*]], i64 [[IPROM]]
; CHECK-NEXT: store i16 0, i16* [[B]], align 4
; CHECK-NEXT: [[INC]] = add nsw i32 [[I]], 1
; CHECK-NEXT: br label [[FOR_COND]]
; CHECK: if.end:
; CHECK-NEXT: ret void
;
; TAILFOLD-LABEL: @optsize(
; TAILFOLD-NEXT: entry:
; TAILFOLD-NEXT: br label [[FOR_COND:%.*]]
; TAILFOLD: for.cond:
; TAILFOLD-NEXT: [[I:%.*]] = phi i32 [ 0, [[ENTRY:%.*]] ], [ [[INC:%.*]], [[FOR_BODY:%.*]] ]
; TAILFOLD-NEXT: [[CMP:%.*]] = icmp slt i32 [[I]], [[N:%.*]]
; TAILFOLD-NEXT: br i1 [[CMP]], label [[FOR_BODY]], label [[IF_END:%.*]]
; TAILFOLD: for.body:
; TAILFOLD-NEXT: [[IPROM:%.*]] = sext i32 [[I]] to i64
; TAILFOLD-NEXT: [[B:%.*]] = getelementptr inbounds i16, i16* [[P:%.*]], i64 [[IPROM]]
; TAILFOLD-NEXT: store i16 0, i16* [[B]], align 4
; TAILFOLD-NEXT: [[INC]] = add nsw i32 [[I]], 1
; TAILFOLD-NEXT: br label [[FOR_COND]]
; TAILFOLD: if.end:
; TAILFOLD-NEXT: ret void
;
entry:
br label %for.cond
for.cond:
%i = phi i32 [ 0, %entry ], [ %inc, %for.body ]
%cmp = icmp slt i32 %i, %n
br i1 %cmp, label %for.body, label %if.end
for.body:
%iprom = sext i32 %i to i64
%b = getelementptr inbounds i16, i16* %p, i64 %iprom
store i16 0, i16* %b, align 4
%inc = add nsw i32 %i, 1
br label %for.cond
if.end:
ret void
}
; multiple exit - no values inside the loop used outside
define void @multiple_unique_exit(i16* %p, i32 %n) {
; CHECK-LABEL: @multiple_unique_exit(
; CHECK-NEXT: entry:
; CHECK-NEXT: [[SMAX:%.*]] = call i32 @llvm.smax.i32(i32 [[N:%.*]], i32 0)
; CHECK-NEXT: [[UMIN:%.*]] = call i32 @llvm.umin.i32(i32 [[SMAX]], i32 2096)
; CHECK-NEXT: [[TMP0:%.*]] = add nuw nsw i32 [[UMIN]], 1
; CHECK-NEXT: [[MIN_ITERS_CHECK:%.*]] = icmp ule i32 [[TMP0]], 2
; CHECK-NEXT: br i1 [[MIN_ITERS_CHECK]], label [[SCALAR_PH:%.*]], label [[VECTOR_PH:%.*]]
; CHECK: vector.ph:
; CHECK-NEXT: [[N_MOD_VF:%.*]] = urem i32 [[TMP0]], 2
; CHECK-NEXT: [[TMP1:%.*]] = icmp eq i32 [[N_MOD_VF]], 0
; CHECK-NEXT: [[TMP2:%.*]] = select i1 [[TMP1]], i32 2, i32 [[N_MOD_VF]]
; CHECK-NEXT: [[N_VEC:%.*]] = sub i32 [[TMP0]], [[TMP2]]
; CHECK-NEXT: br label [[VECTOR_BODY:%.*]]
; CHECK: vector.body:
; CHECK-NEXT: [[INDEX:%.*]] = phi i32 [ 0, [[VECTOR_PH]] ], [ [[INDEX_NEXT:%.*]], [[VECTOR_BODY]] ]
; CHECK-NEXT: [[VEC_IND:%.*]] = phi <2 x i32> [ <i32 0, i32 1>, [[VECTOR_PH]] ], [ [[VEC_IND_NEXT:%.*]], [[VECTOR_BODY]] ]
; CHECK-NEXT: [[TMP3:%.*]] = add i32 [[INDEX]], 0
; CHECK-NEXT: [[TMP4:%.*]] = add i32 [[INDEX]], 1
; CHECK-NEXT: [[TMP5:%.*]] = sext i32 [[TMP3]] to i64
; CHECK-NEXT: [[TMP6:%.*]] = getelementptr inbounds i16, i16* [[P:%.*]], i64 [[TMP5]]
; CHECK-NEXT: [[TMP7:%.*]] = getelementptr inbounds i16, i16* [[TMP6]], i32 0
; CHECK-NEXT: [[TMP8:%.*]] = bitcast i16* [[TMP7]] to <2 x i16>*
; CHECK-NEXT: store <2 x i16> zeroinitializer, <2 x i16>* [[TMP8]], align 4
; CHECK-NEXT: [[INDEX_NEXT]] = add nuw i32 [[INDEX]], 2
; CHECK-NEXT: [[VEC_IND_NEXT]] = add <2 x i32> [[VEC_IND]], <i32 2, i32 2>
; CHECK-NEXT: [[TMP9:%.*]] = icmp eq i32 [[INDEX_NEXT]], [[N_VEC]]
; CHECK-NEXT: br i1 [[TMP9]], label [[MIDDLE_BLOCK:%.*]], label [[VECTOR_BODY]], !llvm.loop [[LOOP6:![0-9]+]]
; CHECK: middle.block:
; CHECK-NEXT: br label [[SCALAR_PH]]
; CHECK: scalar.ph:
; CHECK-NEXT: [[BC_RESUME_VAL:%.*]] = phi i32 [ [[N_VEC]], [[MIDDLE_BLOCK]] ], [ 0, [[ENTRY:%.*]] ]
; CHECK-NEXT: br label [[FOR_COND:%.*]]
; CHECK: for.cond:
; CHECK-NEXT: [[I:%.*]] = phi i32 [ [[BC_RESUME_VAL]], [[SCALAR_PH]] ], [ [[INC:%.*]], [[FOR_BODY:%.*]] ]
; CHECK-NEXT: [[CMP:%.*]] = icmp slt i32 [[I]], [[N]]
; CHECK-NEXT: br i1 [[CMP]], label [[FOR_BODY]], label [[IF_END:%.*]]
; CHECK: for.body:
; CHECK-NEXT: [[IPROM:%.*]] = sext i32 [[I]] to i64
; CHECK-NEXT: [[B:%.*]] = getelementptr inbounds i16, i16* [[P]], i64 [[IPROM]]
; CHECK-NEXT: store i16 0, i16* [[B]], align 4
; CHECK-NEXT: [[INC]] = add nsw i32 [[I]], 1
; CHECK-NEXT: [[CMP2:%.*]] = icmp slt i32 [[I]], 2096
; CHECK-NEXT: br i1 [[CMP2]], label [[FOR_COND]], label [[IF_END]], !llvm.loop [[LOOP7:![0-9]+]]
; CHECK: if.end:
; CHECK-NEXT: ret void
;
; TAILFOLD-LABEL: @multiple_unique_exit(
; TAILFOLD-NEXT: entry:
; TAILFOLD-NEXT: br label [[FOR_COND:%.*]]
; TAILFOLD: for.cond:
; TAILFOLD-NEXT: [[I:%.*]] = phi i32 [ 0, [[ENTRY:%.*]] ], [ [[INC:%.*]], [[FOR_BODY:%.*]] ]
; TAILFOLD-NEXT: [[CMP:%.*]] = icmp slt i32 [[I]], [[N:%.*]]
; TAILFOLD-NEXT: br i1 [[CMP]], label [[FOR_BODY]], label [[IF_END:%.*]]
; TAILFOLD: for.body:
; TAILFOLD-NEXT: [[IPROM:%.*]] = sext i32 [[I]] to i64
; TAILFOLD-NEXT: [[B:%.*]] = getelementptr inbounds i16, i16* [[P:%.*]], i64 [[IPROM]]
; TAILFOLD-NEXT: store i16 0, i16* [[B]], align 4
; TAILFOLD-NEXT: [[INC]] = add nsw i32 [[I]], 1
; TAILFOLD-NEXT: [[CMP2:%.*]] = icmp slt i32 [[I]], 2096
; TAILFOLD-NEXT: br i1 [[CMP2]], label [[FOR_COND]], label [[IF_END]]
; TAILFOLD: if.end:
; TAILFOLD-NEXT: ret void
;
entry:
br label %for.cond
for.cond:
%i = phi i32 [ 0, %entry ], [ %inc, %for.body ]
%cmp = icmp slt i32 %i, %n
br i1 %cmp, label %for.body, label %if.end
for.body:
%iprom = sext i32 %i to i64
%b = getelementptr inbounds i16, i16* %p, i64 %iprom
store i16 0, i16* %b, align 4
%inc = add nsw i32 %i, 1
%cmp2 = icmp slt i32 %i, 2096
br i1 %cmp2, label %for.cond, label %if.end
if.end:
ret void
}
; multiple exit - with an lcssa phi
define i32 @multiple_unique_exit2(i16* %p, i32 %n) {
; CHECK-LABEL: @multiple_unique_exit2(
; CHECK-NEXT: entry:
; CHECK-NEXT: [[SMAX:%.*]] = call i32 @llvm.smax.i32(i32 [[N:%.*]], i32 0)
; CHECK-NEXT: [[UMIN:%.*]] = call i32 @llvm.umin.i32(i32 [[SMAX]], i32 2096)
; CHECK-NEXT: [[TMP0:%.*]] = add nuw nsw i32 [[UMIN]], 1
; CHECK-NEXT: [[MIN_ITERS_CHECK:%.*]] = icmp ule i32 [[TMP0]], 2
; CHECK-NEXT: br i1 [[MIN_ITERS_CHECK]], label [[SCALAR_PH:%.*]], label [[VECTOR_PH:%.*]]
; CHECK: vector.ph:
; CHECK-NEXT: [[N_MOD_VF:%.*]] = urem i32 [[TMP0]], 2
; CHECK-NEXT: [[TMP1:%.*]] = icmp eq i32 [[N_MOD_VF]], 0
; CHECK-NEXT: [[TMP2:%.*]] = select i1 [[TMP1]], i32 2, i32 [[N_MOD_VF]]
; CHECK-NEXT: [[N_VEC:%.*]] = sub i32 [[TMP0]], [[TMP2]]
; CHECK-NEXT: br label [[VECTOR_BODY:%.*]]
; CHECK: vector.body:
; CHECK-NEXT: [[INDEX:%.*]] = phi i32 [ 0, [[VECTOR_PH]] ], [ [[INDEX_NEXT:%.*]], [[VECTOR_BODY]] ]
; CHECK-NEXT: [[VEC_IND:%.*]] = phi <2 x i32> [ <i32 0, i32 1>, [[VECTOR_PH]] ], [ [[VEC_IND_NEXT:%.*]], [[VECTOR_BODY]] ]
; CHECK-NEXT: [[TMP3:%.*]] = add i32 [[INDEX]], 0
; CHECK-NEXT: [[TMP4:%.*]] = add i32 [[INDEX]], 1
; CHECK-NEXT: [[TMP5:%.*]] = sext i32 [[TMP3]] to i64
; CHECK-NEXT: [[TMP6:%.*]] = getelementptr inbounds i16, i16* [[P:%.*]], i64 [[TMP5]]
; CHECK-NEXT: [[TMP7:%.*]] = getelementptr inbounds i16, i16* [[TMP6]], i32 0
; CHECK-NEXT: [[TMP8:%.*]] = bitcast i16* [[TMP7]] to <2 x i16>*
; CHECK-NEXT: store <2 x i16> zeroinitializer, <2 x i16>* [[TMP8]], align 4
; CHECK-NEXT: [[INDEX_NEXT]] = add nuw i32 [[INDEX]], 2
; CHECK-NEXT: [[VEC_IND_NEXT]] = add <2 x i32> [[VEC_IND]], <i32 2, i32 2>
; CHECK-NEXT: [[TMP9:%.*]] = icmp eq i32 [[INDEX_NEXT]], [[N_VEC]]
; CHECK-NEXT: br i1 [[TMP9]], label [[MIDDLE_BLOCK:%.*]], label [[VECTOR_BODY]], !llvm.loop [[LOOP8:![0-9]+]]
; CHECK: middle.block:
; CHECK-NEXT: br label [[SCALAR_PH]]
; CHECK: scalar.ph:
; CHECK-NEXT: [[BC_RESUME_VAL:%.*]] = phi i32 [ [[N_VEC]], [[MIDDLE_BLOCK]] ], [ 0, [[ENTRY:%.*]] ]
; CHECK-NEXT: br label [[FOR_COND:%.*]]
; CHECK: for.cond:
; CHECK-NEXT: [[I:%.*]] = phi i32 [ [[BC_RESUME_VAL]], [[SCALAR_PH]] ], [ [[INC:%.*]], [[FOR_BODY:%.*]] ]
; CHECK-NEXT: [[CMP:%.*]] = icmp slt i32 [[I]], [[N]]
; CHECK-NEXT: br i1 [[CMP]], label [[FOR_BODY]], label [[IF_END:%.*]]
; CHECK: for.body:
; CHECK-NEXT: [[IPROM:%.*]] = sext i32 [[I]] to i64
; CHECK-NEXT: [[B:%.*]] = getelementptr inbounds i16, i16* [[P]], i64 [[IPROM]]
; CHECK-NEXT: store i16 0, i16* [[B]], align 4
; CHECK-NEXT: [[INC]] = add nsw i32 [[I]], 1
; CHECK-NEXT: [[CMP2:%.*]] = icmp slt i32 [[I]], 2096
; CHECK-NEXT: br i1 [[CMP2]], label [[FOR_COND]], label [[IF_END]], !llvm.loop [[LOOP9:![0-9]+]]
; CHECK: if.end:
; CHECK-NEXT: [[I_LCSSA:%.*]] = phi i32 [ [[I]], [[FOR_BODY]] ], [ [[I]], [[FOR_COND]] ]
; CHECK-NEXT: ret i32 [[I_LCSSA]]
;
; TAILFOLD-LABEL: @multiple_unique_exit2(
; TAILFOLD-NEXT: entry:
; TAILFOLD-NEXT: br label [[FOR_COND:%.*]]
; TAILFOLD: for.cond:
; TAILFOLD-NEXT: [[I:%.*]] = phi i32 [ 0, [[ENTRY:%.*]] ], [ [[INC:%.*]], [[FOR_BODY:%.*]] ]
; TAILFOLD-NEXT: [[CMP:%.*]] = icmp slt i32 [[I]], [[N:%.*]]
; TAILFOLD-NEXT: br i1 [[CMP]], label [[FOR_BODY]], label [[IF_END:%.*]]
; TAILFOLD: for.body:
; TAILFOLD-NEXT: [[IPROM:%.*]] = sext i32 [[I]] to i64
; TAILFOLD-NEXT: [[B:%.*]] = getelementptr inbounds i16, i16* [[P:%.*]], i64 [[IPROM]]
; TAILFOLD-NEXT: store i16 0, i16* [[B]], align 4
; TAILFOLD-NEXT: [[INC]] = add nsw i32 [[I]], 1
; TAILFOLD-NEXT: [[CMP2:%.*]] = icmp slt i32 [[I]], 2096
; TAILFOLD-NEXT: br i1 [[CMP2]], label [[FOR_COND]], label [[IF_END]]
; TAILFOLD: if.end:
; TAILFOLD-NEXT: [[I_LCSSA:%.*]] = phi i32 [ [[I]], [[FOR_BODY]] ], [ [[I]], [[FOR_COND]] ]
; TAILFOLD-NEXT: ret i32 [[I_LCSSA]]
;
entry:
br label %for.cond
for.cond:
%i = phi i32 [ 0, %entry ], [ %inc, %for.body ]
%cmp = icmp slt i32 %i, %n
br i1 %cmp, label %for.body, label %if.end
for.body:
%iprom = sext i32 %i to i64
%b = getelementptr inbounds i16, i16* %p, i64 %iprom
store i16 0, i16* %b, align 4
%inc = add nsw i32 %i, 1
%cmp2 = icmp slt i32 %i, 2096
br i1 %cmp2, label %for.cond, label %if.end
if.end:
ret i32 %i
}
; multiple exit w/a non lcssa phi
define i32 @multiple_unique_exit3(i16* %p, i32 %n) {
; CHECK-LABEL: @multiple_unique_exit3(
; CHECK-NEXT: entry:
; CHECK-NEXT: [[SMAX:%.*]] = call i32 @llvm.smax.i32(i32 [[N:%.*]], i32 0)
; CHECK-NEXT: [[UMIN:%.*]] = call i32 @llvm.umin.i32(i32 [[SMAX]], i32 2096)
; CHECK-NEXT: [[TMP0:%.*]] = add nuw nsw i32 [[UMIN]], 1
; CHECK-NEXT: [[MIN_ITERS_CHECK:%.*]] = icmp ule i32 [[TMP0]], 2
; CHECK-NEXT: br i1 [[MIN_ITERS_CHECK]], label [[SCALAR_PH:%.*]], label [[VECTOR_PH:%.*]]
; CHECK: vector.ph:
; CHECK-NEXT: [[N_MOD_VF:%.*]] = urem i32 [[TMP0]], 2
; CHECK-NEXT: [[TMP1:%.*]] = icmp eq i32 [[N_MOD_VF]], 0
; CHECK-NEXT: [[TMP2:%.*]] = select i1 [[TMP1]], i32 2, i32 [[N_MOD_VF]]
; CHECK-NEXT: [[N_VEC:%.*]] = sub i32 [[TMP0]], [[TMP2]]
; CHECK-NEXT: br label [[VECTOR_BODY:%.*]]
; CHECK: vector.body:
; CHECK-NEXT: [[INDEX:%.*]] = phi i32 [ 0, [[VECTOR_PH]] ], [ [[INDEX_NEXT:%.*]], [[VECTOR_BODY]] ]
; CHECK-NEXT: [[VEC_IND:%.*]] = phi <2 x i32> [ <i32 0, i32 1>, [[VECTOR_PH]] ], [ [[VEC_IND_NEXT:%.*]], [[VECTOR_BODY]] ]
; CHECK-NEXT: [[TMP3:%.*]] = add i32 [[INDEX]], 0
; CHECK-NEXT: [[TMP4:%.*]] = add i32 [[INDEX]], 1
; CHECK-NEXT: [[TMP5:%.*]] = sext i32 [[TMP3]] to i64
; CHECK-NEXT: [[TMP6:%.*]] = getelementptr inbounds i16, i16* [[P:%.*]], i64 [[TMP5]]
; CHECK-NEXT: [[TMP7:%.*]] = getelementptr inbounds i16, i16* [[TMP6]], i32 0
; CHECK-NEXT: [[TMP8:%.*]] = bitcast i16* [[TMP7]] to <2 x i16>*
; CHECK-NEXT: store <2 x i16> zeroinitializer, <2 x i16>* [[TMP8]], align 4
; CHECK-NEXT: [[INDEX_NEXT]] = add nuw i32 [[INDEX]], 2
; CHECK-NEXT: [[VEC_IND_NEXT]] = add <2 x i32> [[VEC_IND]], <i32 2, i32 2>
; CHECK-NEXT: [[TMP9:%.*]] = icmp eq i32 [[INDEX_NEXT]], [[N_VEC]]
; CHECK-NEXT: br i1 [[TMP9]], label [[MIDDLE_BLOCK:%.*]], label [[VECTOR_BODY]], !llvm.loop [[LOOP10:![0-9]+]]
; CHECK: middle.block:
; CHECK-NEXT: br label [[SCALAR_PH]]
; CHECK: scalar.ph:
; CHECK-NEXT: [[BC_RESUME_VAL:%.*]] = phi i32 [ [[N_VEC]], [[MIDDLE_BLOCK]] ], [ 0, [[ENTRY:%.*]] ]
; CHECK-NEXT: br label [[FOR_COND:%.*]]
; CHECK: for.cond:
; CHECK-NEXT: [[I:%.*]] = phi i32 [ [[BC_RESUME_VAL]], [[SCALAR_PH]] ], [ [[INC:%.*]], [[FOR_BODY:%.*]] ]
; CHECK-NEXT: [[CMP:%.*]] = icmp slt i32 [[I]], [[N]]
; CHECK-NEXT: br i1 [[CMP]], label [[FOR_BODY]], label [[IF_END:%.*]]
; CHECK: for.body:
; CHECK-NEXT: [[IPROM:%.*]] = sext i32 [[I]] to i64
; CHECK-NEXT: [[B:%.*]] = getelementptr inbounds i16, i16* [[P]], i64 [[IPROM]]
; CHECK-NEXT: store i16 0, i16* [[B]], align 4
; CHECK-NEXT: [[INC]] = add nsw i32 [[I]], 1
; CHECK-NEXT: [[CMP2:%.*]] = icmp slt i32 [[I]], 2096
; CHECK-NEXT: br i1 [[CMP2]], label [[FOR_COND]], label [[IF_END]], !llvm.loop [[LOOP11:![0-9]+]]
; CHECK: if.end:
; CHECK-NEXT: [[EXIT:%.*]] = phi i32 [ 0, [[FOR_COND]] ], [ 1, [[FOR_BODY]] ]
; CHECK-NEXT: ret i32 [[EXIT]]
;
; TAILFOLD-LABEL: @multiple_unique_exit3(
; TAILFOLD-NEXT: entry:
; TAILFOLD-NEXT: br label [[FOR_COND:%.*]]
; TAILFOLD: for.cond:
; TAILFOLD-NEXT: [[I:%.*]] = phi i32 [ 0, [[ENTRY:%.*]] ], [ [[INC:%.*]], [[FOR_BODY:%.*]] ]
; TAILFOLD-NEXT: [[CMP:%.*]] = icmp slt i32 [[I]], [[N:%.*]]
; TAILFOLD-NEXT: br i1 [[CMP]], label [[FOR_BODY]], label [[IF_END:%.*]]
; TAILFOLD: for.body:
; TAILFOLD-NEXT: [[IPROM:%.*]] = sext i32 [[I]] to i64
; TAILFOLD-NEXT: [[B:%.*]] = getelementptr inbounds i16, i16* [[P:%.*]], i64 [[IPROM]]
; TAILFOLD-NEXT: store i16 0, i16* [[B]], align 4
; TAILFOLD-NEXT: [[INC]] = add nsw i32 [[I]], 1
; TAILFOLD-NEXT: [[CMP2:%.*]] = icmp slt i32 [[I]], 2096
; TAILFOLD-NEXT: br i1 [[CMP2]], label [[FOR_COND]], label [[IF_END]]
; TAILFOLD: if.end:
; TAILFOLD-NEXT: [[EXIT:%.*]] = phi i32 [ 0, [[FOR_COND]] ], [ 1, [[FOR_BODY]] ]
; TAILFOLD-NEXT: ret i32 [[EXIT]]
;
entry:
br label %for.cond
for.cond:
%i = phi i32 [ 0, %entry ], [ %inc, %for.body ]
%cmp = icmp slt i32 %i, %n
br i1 %cmp, label %for.body, label %if.end
for.body:
%iprom = sext i32 %i to i64
%b = getelementptr inbounds i16, i16* %p, i64 %iprom
store i16 0, i16* %b, align 4
%inc = add nsw i32 %i, 1
%cmp2 = icmp slt i32 %i, 2096
br i1 %cmp2, label %for.cond, label %if.end
if.end:
%exit = phi i32 [0, %for.cond], [1, %for.body]
ret i32 %exit
}
; multiple exits w/distinct target blocks
define i32 @multiple_exit_blocks(i16* %p, i32 %n) {
; CHECK-LABEL: @multiple_exit_blocks(
; CHECK-NEXT: entry:
; CHECK-NEXT: [[SMAX:%.*]] = call i32 @llvm.smax.i32(i32 [[N:%.*]], i32 0)
; CHECK-NEXT: [[UMIN:%.*]] = call i32 @llvm.umin.i32(i32 [[SMAX]], i32 2096)
; CHECK-NEXT: [[TMP0:%.*]] = add nuw nsw i32 [[UMIN]], 1
; CHECK-NEXT: [[MIN_ITERS_CHECK:%.*]] = icmp ule i32 [[TMP0]], 2
; CHECK-NEXT: br i1 [[MIN_ITERS_CHECK]], label [[SCALAR_PH:%.*]], label [[VECTOR_PH:%.*]]
; CHECK: vector.ph:
; CHECK-NEXT: [[N_MOD_VF:%.*]] = urem i32 [[TMP0]], 2
; CHECK-NEXT: [[TMP1:%.*]] = icmp eq i32 [[N_MOD_VF]], 0
; CHECK-NEXT: [[TMP2:%.*]] = select i1 [[TMP1]], i32 2, i32 [[N_MOD_VF]]
; CHECK-NEXT: [[N_VEC:%.*]] = sub i32 [[TMP0]], [[TMP2]]
; CHECK-NEXT: br label [[VECTOR_BODY:%.*]]
; CHECK: vector.body:
; CHECK-NEXT: [[INDEX:%.*]] = phi i32 [ 0, [[VECTOR_PH]] ], [ [[INDEX_NEXT:%.*]], [[VECTOR_BODY]] ]
; CHECK-NEXT: [[VEC_IND:%.*]] = phi <2 x i32> [ <i32 0, i32 1>, [[VECTOR_PH]] ], [ [[VEC_IND_NEXT:%.*]], [[VECTOR_BODY]] ]
; CHECK-NEXT: [[TMP3:%.*]] = add i32 [[INDEX]], 0
; CHECK-NEXT: [[TMP4:%.*]] = add i32 [[INDEX]], 1
; CHECK-NEXT: [[TMP5:%.*]] = sext i32 [[TMP3]] to i64
; CHECK-NEXT: [[TMP6:%.*]] = getelementptr inbounds i16, i16* [[P:%.*]], i64 [[TMP5]]
; CHECK-NEXT: [[TMP7:%.*]] = getelementptr inbounds i16, i16* [[TMP6]], i32 0
; CHECK-NEXT: [[TMP8:%.*]] = bitcast i16* [[TMP7]] to <2 x i16>*
; CHECK-NEXT: store <2 x i16> zeroinitializer, <2 x i16>* [[TMP8]], align 4
; CHECK-NEXT: [[INDEX_NEXT]] = add nuw i32 [[INDEX]], 2
; CHECK-NEXT: [[VEC_IND_NEXT]] = add <2 x i32> [[VEC_IND]], <i32 2, i32 2>
; CHECK-NEXT: [[TMP9:%.*]] = icmp eq i32 [[INDEX_NEXT]], [[N_VEC]]
; CHECK-NEXT: br i1 [[TMP9]], label [[MIDDLE_BLOCK:%.*]], label [[VECTOR_BODY]], !llvm.loop [[LOOP12:![0-9]+]]
; CHECK: middle.block:
; CHECK-NEXT: br label [[SCALAR_PH]]
; CHECK: scalar.ph:
; CHECK-NEXT: [[BC_RESUME_VAL:%.*]] = phi i32 [ [[N_VEC]], [[MIDDLE_BLOCK]] ], [ 0, [[ENTRY:%.*]] ]
; CHECK-NEXT: br label [[FOR_COND:%.*]]
; CHECK: for.cond:
; CHECK-NEXT: [[I:%.*]] = phi i32 [ [[BC_RESUME_VAL]], [[SCALAR_PH]] ], [ [[INC:%.*]], [[FOR_BODY:%.*]] ]
; CHECK-NEXT: [[CMP:%.*]] = icmp slt i32 [[I]], [[N]]
; CHECK-NEXT: br i1 [[CMP]], label [[FOR_BODY]], label [[IF_END:%.*]]
; CHECK: for.body:
; CHECK-NEXT: [[IPROM:%.*]] = sext i32 [[I]] to i64
; CHECK-NEXT: [[B:%.*]] = getelementptr inbounds i16, i16* [[P]], i64 [[IPROM]]
; CHECK-NEXT: store i16 0, i16* [[B]], align 4
; CHECK-NEXT: [[INC]] = add nsw i32 [[I]], 1
; CHECK-NEXT: [[CMP2:%.*]] = icmp slt i32 [[I]], 2096
; CHECK-NEXT: br i1 [[CMP2]], label [[FOR_COND]], label [[IF_END2:%.*]], !llvm.loop [[LOOP13:![0-9]+]]
; CHECK: if.end:
; CHECK-NEXT: ret i32 0
; CHECK: if.end2:
; CHECK-NEXT: ret i32 1
;
; TAILFOLD-LABEL: @multiple_exit_blocks(
; TAILFOLD-NEXT: entry:
; TAILFOLD-NEXT: br label [[FOR_COND:%.*]]
; TAILFOLD: for.cond:
; TAILFOLD-NEXT: [[I:%.*]] = phi i32 [ 0, [[ENTRY:%.*]] ], [ [[INC:%.*]], [[FOR_BODY:%.*]] ]
; TAILFOLD-NEXT: [[CMP:%.*]] = icmp slt i32 [[I]], [[N:%.*]]
; TAILFOLD-NEXT: br i1 [[CMP]], label [[FOR_BODY]], label [[IF_END:%.*]]
; TAILFOLD: for.body:
; TAILFOLD-NEXT: [[IPROM:%.*]] = sext i32 [[I]] to i64
; TAILFOLD-NEXT: [[B:%.*]] = getelementptr inbounds i16, i16* [[P:%.*]], i64 [[IPROM]]
; TAILFOLD-NEXT: store i16 0, i16* [[B]], align 4
; TAILFOLD-NEXT: [[INC]] = add nsw i32 [[I]], 1
; TAILFOLD-NEXT: [[CMP2:%.*]] = icmp slt i32 [[I]], 2096
; TAILFOLD-NEXT: br i1 [[CMP2]], label [[FOR_COND]], label [[IF_END2:%.*]]
; TAILFOLD: if.end:
; TAILFOLD-NEXT: ret i32 0
; TAILFOLD: if.end2:
; TAILFOLD-NEXT: ret i32 1
;
entry:
br label %for.cond
for.cond:
%i = phi i32 [ 0, %entry ], [ %inc, %for.body ]
%cmp = icmp slt i32 %i, %n
br i1 %cmp, label %for.body, label %if.end
for.body:
%iprom = sext i32 %i to i64
%b = getelementptr inbounds i16, i16* %p, i64 %iprom
store i16 0, i16* %b, align 4
%inc = add nsw i32 %i, 1
%cmp2 = icmp slt i32 %i, 2096
br i1 %cmp2, label %for.cond, label %if.end2
if.end:
ret i32 0
if.end2:
ret i32 1
}
; LCSSA, common value each exit
define i32 @multiple_exit_blocks2(i16* %p, i32 %n) {
; CHECK-LABEL: @multiple_exit_blocks2(
; CHECK-NEXT: entry:
; CHECK-NEXT: [[SMAX:%.*]] = call i32 @llvm.smax.i32(i32 [[N:%.*]], i32 0)
; CHECK-NEXT: [[UMIN:%.*]] = call i32 @llvm.umin.i32(i32 [[SMAX]], i32 2096)
; CHECK-NEXT: [[TMP0:%.*]] = add nuw nsw i32 [[UMIN]], 1
; CHECK-NEXT: [[MIN_ITERS_CHECK:%.*]] = icmp ule i32 [[TMP0]], 2
; CHECK-NEXT: br i1 [[MIN_ITERS_CHECK]], label [[SCALAR_PH:%.*]], label [[VECTOR_PH:%.*]]
; CHECK: vector.ph:
; CHECK-NEXT: [[N_MOD_VF:%.*]] = urem i32 [[TMP0]], 2
; CHECK-NEXT: [[TMP1:%.*]] = icmp eq i32 [[N_MOD_VF]], 0
; CHECK-NEXT: [[TMP2:%.*]] = select i1 [[TMP1]], i32 2, i32 [[N_MOD_VF]]
; CHECK-NEXT: [[N_VEC:%.*]] = sub i32 [[TMP0]], [[TMP2]]
; CHECK-NEXT: br label [[VECTOR_BODY:%.*]]
; CHECK: vector.body:
; CHECK-NEXT: [[INDEX:%.*]] = phi i32 [ 0, [[VECTOR_PH]] ], [ [[INDEX_NEXT:%.*]], [[VECTOR_BODY]] ]
; CHECK-NEXT: [[VEC_IND:%.*]] = phi <2 x i32> [ <i32 0, i32 1>, [[VECTOR_PH]] ], [ [[VEC_IND_NEXT:%.*]], [[VECTOR_BODY]] ]
; CHECK-NEXT: [[TMP3:%.*]] = add i32 [[INDEX]], 0
; CHECK-NEXT: [[TMP4:%.*]] = add i32 [[INDEX]], 1
; CHECK-NEXT: [[TMP5:%.*]] = sext i32 [[TMP3]] to i64
; CHECK-NEXT: [[TMP6:%.*]] = getelementptr inbounds i16, i16* [[P:%.*]], i64 [[TMP5]]
; CHECK-NEXT: [[TMP7:%.*]] = getelementptr inbounds i16, i16* [[TMP6]], i32 0
; CHECK-NEXT: [[TMP8:%.*]] = bitcast i16* [[TMP7]] to <2 x i16>*
; CHECK-NEXT: store <2 x i16> zeroinitializer, <2 x i16>* [[TMP8]], align 4
; CHECK-NEXT: [[INDEX_NEXT]] = add nuw i32 [[INDEX]], 2
; CHECK-NEXT: [[VEC_IND_NEXT]] = add <2 x i32> [[VEC_IND]], <i32 2, i32 2>
; CHECK-NEXT: [[TMP9:%.*]] = icmp eq i32 [[INDEX_NEXT]], [[N_VEC]]
; CHECK-NEXT: br i1 [[TMP9]], label [[MIDDLE_BLOCK:%.*]], label [[VECTOR_BODY]], !llvm.loop [[LOOP14:![0-9]+]]
; CHECK: middle.block:
; CHECK-NEXT: br label [[SCALAR_PH]]
; CHECK: scalar.ph:
; CHECK-NEXT: [[BC_RESUME_VAL:%.*]] = phi i32 [ [[N_VEC]], [[MIDDLE_BLOCK]] ], [ 0, [[ENTRY:%.*]] ]
; CHECK-NEXT: br label [[FOR_COND:%.*]]
; CHECK: for.cond:
; CHECK-NEXT: [[I:%.*]] = phi i32 [ [[BC_RESUME_VAL]], [[SCALAR_PH]] ], [ [[INC:%.*]], [[FOR_BODY:%.*]] ]
; CHECK-NEXT: [[CMP:%.*]] = icmp slt i32 [[I]], [[N]]
; CHECK-NEXT: br i1 [[CMP]], label [[FOR_BODY]], label [[IF_END:%.*]]
; CHECK: for.body:
; CHECK-NEXT: [[IPROM:%.*]] = sext i32 [[I]] to i64
; CHECK-NEXT: [[B:%.*]] = getelementptr inbounds i16, i16* [[P]], i64 [[IPROM]]
; CHECK-NEXT: store i16 0, i16* [[B]], align 4
; CHECK-NEXT: [[INC]] = add nsw i32 [[I]], 1
; CHECK-NEXT: [[CMP2:%.*]] = icmp slt i32 [[I]], 2096
; CHECK-NEXT: br i1 [[CMP2]], label [[FOR_COND]], label [[IF_END2:%.*]], !llvm.loop [[LOOP15:![0-9]+]]
; CHECK: if.end:
; CHECK-NEXT: [[I_LCSSA:%.*]] = phi i32 [ [[I]], [[FOR_COND]] ]
; CHECK-NEXT: ret i32 [[I_LCSSA]]
; CHECK: if.end2:
; CHECK-NEXT: [[I_LCSSA1:%.*]] = phi i32 [ [[I]], [[FOR_BODY]] ]
; CHECK-NEXT: ret i32 [[I_LCSSA1]]
;
; TAILFOLD-LABEL: @multiple_exit_blocks2(
; TAILFOLD-NEXT: entry:
; TAILFOLD-NEXT: br label [[FOR_COND:%.*]]
; TAILFOLD: for.cond:
; TAILFOLD-NEXT: [[I:%.*]] = phi i32 [ 0, [[ENTRY:%.*]] ], [ [[INC:%.*]], [[FOR_BODY:%.*]] ]
; TAILFOLD-NEXT: [[CMP:%.*]] = icmp slt i32 [[I]], [[N:%.*]]
; TAILFOLD-NEXT: br i1 [[CMP]], label [[FOR_BODY]], label [[IF_END:%.*]]
; TAILFOLD: for.body:
; TAILFOLD-NEXT: [[IPROM:%.*]] = sext i32 [[I]] to i64
; TAILFOLD-NEXT: [[B:%.*]] = getelementptr inbounds i16, i16* [[P:%.*]], i64 [[IPROM]]
; TAILFOLD-NEXT: store i16 0, i16* [[B]], align 4
; TAILFOLD-NEXT: [[INC]] = add nsw i32 [[I]], 1
; TAILFOLD-NEXT: [[CMP2:%.*]] = icmp slt i32 [[I]], 2096
; TAILFOLD-NEXT: br i1 [[CMP2]], label [[FOR_COND]], label [[IF_END2:%.*]]
; TAILFOLD: if.end:
; TAILFOLD-NEXT: [[I_LCSSA:%.*]] = phi i32 [ [[I]], [[FOR_COND]] ]
; TAILFOLD-NEXT: ret i32 [[I_LCSSA]]
; TAILFOLD: if.end2:
; TAILFOLD-NEXT: [[I_LCSSA1:%.*]] = phi i32 [ [[I]], [[FOR_BODY]] ]
; TAILFOLD-NEXT: ret i32 [[I_LCSSA1]]
;
entry:
br label %for.cond
for.cond:
%i = phi i32 [ 0, %entry ], [ %inc, %for.body ]
%cmp = icmp slt i32 %i, %n
br i1 %cmp, label %for.body, label %if.end
for.body:
%iprom = sext i32 %i to i64
%b = getelementptr inbounds i16, i16* %p, i64 %iprom
store i16 0, i16* %b, align 4
%inc = add nsw i32 %i, 1
%cmp2 = icmp slt i32 %i, 2096
br i1 %cmp2, label %for.cond, label %if.end2
if.end:
ret i32 %i
if.end2:
ret i32 %i
}
; LCSSA, distinct value each exit
define i32 @multiple_exit_blocks3(i16* %p, i32 %n) {
; CHECK-LABEL: @multiple_exit_blocks3(
; CHECK-NEXT: entry:
; CHECK-NEXT: [[SMAX:%.*]] = call i32 @llvm.smax.i32(i32 [[N:%.*]], i32 0)
; CHECK-NEXT: [[UMIN:%.*]] = call i32 @llvm.umin.i32(i32 [[SMAX]], i32 2096)
; CHECK-NEXT: [[TMP0:%.*]] = add nuw nsw i32 [[UMIN]], 1
; CHECK-NEXT: [[MIN_ITERS_CHECK:%.*]] = icmp ule i32 [[TMP0]], 2
; CHECK-NEXT: br i1 [[MIN_ITERS_CHECK]], label [[SCALAR_PH:%.*]], label [[VECTOR_PH:%.*]]
; CHECK: vector.ph:
; CHECK-NEXT: [[N_MOD_VF:%.*]] = urem i32 [[TMP0]], 2
; CHECK-NEXT: [[TMP1:%.*]] = icmp eq i32 [[N_MOD_VF]], 0
; CHECK-NEXT: [[TMP2:%.*]] = select i1 [[TMP1]], i32 2, i32 [[N_MOD_VF]]
; CHECK-NEXT: [[N_VEC:%.*]] = sub i32 [[TMP0]], [[TMP2]]
; CHECK-NEXT: br label [[VECTOR_BODY:%.*]]
; CHECK: vector.body:
; CHECK-NEXT: [[INDEX:%.*]] = phi i32 [ 0, [[VECTOR_PH]] ], [ [[INDEX_NEXT:%.*]], [[VECTOR_BODY]] ]
; CHECK-NEXT: [[VEC_IND:%.*]] = phi <2 x i32> [ <i32 0, i32 1>, [[VECTOR_PH]] ], [ [[VEC_IND_NEXT:%.*]], [[VECTOR_BODY]] ]
; CHECK-NEXT: [[TMP3:%.*]] = add i32 [[INDEX]], 0
; CHECK-NEXT: [[TMP4:%.*]] = add i32 [[INDEX]], 1
; CHECK-NEXT: [[TMP5:%.*]] = sext i32 [[TMP3]] to i64
; CHECK-NEXT: [[TMP6:%.*]] = getelementptr inbounds i16, i16* [[P:%.*]], i64 [[TMP5]]
; CHECK-NEXT: [[TMP7:%.*]] = getelementptr inbounds i16, i16* [[TMP6]], i32 0
; CHECK-NEXT: [[TMP8:%.*]] = bitcast i16* [[TMP7]] to <2 x i16>*
; CHECK-NEXT: store <2 x i16> zeroinitializer, <2 x i16>* [[TMP8]], align 4
; CHECK-NEXT: [[TMP9:%.*]] = add nsw <2 x i32> [[VEC_IND]], <i32 1, i32 1>
; CHECK-NEXT: [[INDEX_NEXT]] = add nuw i32 [[INDEX]], 2
; CHECK-NEXT: [[VEC_IND_NEXT]] = add <2 x i32> [[VEC_IND]], <i32 2, i32 2>
; CHECK-NEXT: [[TMP10:%.*]] = icmp eq i32 [[INDEX_NEXT]], [[N_VEC]]
; CHECK-NEXT: br i1 [[TMP10]], label [[MIDDLE_BLOCK:%.*]], label [[VECTOR_BODY]], !llvm.loop [[LOOP16:![0-9]+]]
; CHECK: middle.block:
; CHECK-NEXT: br label [[SCALAR_PH]]
; CHECK: scalar.ph:
; CHECK-NEXT: [[BC_RESUME_VAL:%.*]] = phi i32 [ [[N_VEC]], [[MIDDLE_BLOCK]] ], [ 0, [[ENTRY:%.*]] ]
; CHECK-NEXT: br label [[FOR_COND:%.*]]
; CHECK: for.cond:
; CHECK-NEXT: [[I:%.*]] = phi i32 [ [[BC_RESUME_VAL]], [[SCALAR_PH]] ], [ [[INC:%.*]], [[FOR_BODY:%.*]] ]
; CHECK-NEXT: [[CMP:%.*]] = icmp slt i32 [[I]], [[N]]
; CHECK-NEXT: br i1 [[CMP]], label [[FOR_BODY]], label [[IF_END:%.*]]
; CHECK: for.body:
; CHECK-NEXT: [[IPROM:%.*]] = sext i32 [[I]] to i64
; CHECK-NEXT: [[B:%.*]] = getelementptr inbounds i16, i16* [[P]], i64 [[IPROM]]
; CHECK-NEXT: store i16 0, i16* [[B]], align 4
; CHECK-NEXT: [[INC]] = add nsw i32 [[I]], 1
; CHECK-NEXT: [[CMP2:%.*]] = icmp slt i32 [[I]], 2096
; CHECK-NEXT: br i1 [[CMP2]], label [[FOR_COND]], label [[IF_END2:%.*]], !llvm.loop [[LOOP17:![0-9]+]]
; CHECK: if.end:
; CHECK-NEXT: [[I_LCSSA:%.*]] = phi i32 [ [[I]], [[FOR_COND]] ]
; CHECK-NEXT: ret i32 [[I_LCSSA]]
; CHECK: if.end2:
; CHECK-NEXT: [[INC_LCSSA:%.*]] = phi i32 [ [[INC]], [[FOR_BODY]] ]
; CHECK-NEXT: ret i32 [[INC_LCSSA]]
;
; TAILFOLD-LABEL: @multiple_exit_blocks3(
; TAILFOLD-NEXT: entry:
; TAILFOLD-NEXT: br label [[FOR_COND:%.*]]
; TAILFOLD: for.cond:
; TAILFOLD-NEXT: [[I:%.*]] = phi i32 [ 0, [[ENTRY:%.*]] ], [ [[INC:%.*]], [[FOR_BODY:%.*]] ]
; TAILFOLD-NEXT: [[CMP:%.*]] = icmp slt i32 [[I]], [[N:%.*]]
; TAILFOLD-NEXT: br i1 [[CMP]], label [[FOR_BODY]], label [[IF_END:%.*]]
; TAILFOLD: for.body:
; TAILFOLD-NEXT: [[IPROM:%.*]] = sext i32 [[I]] to i64
; TAILFOLD-NEXT: [[B:%.*]] = getelementptr inbounds i16, i16* [[P:%.*]], i64 [[IPROM]]
; TAILFOLD-NEXT: store i16 0, i16* [[B]], align 4
; TAILFOLD-NEXT: [[INC]] = add nsw i32 [[I]], 1
; TAILFOLD-NEXT: [[CMP2:%.*]] = icmp slt i32 [[I]], 2096
; TAILFOLD-NEXT: br i1 [[CMP2]], label [[FOR_COND]], label [[IF_END2:%.*]]
; TAILFOLD: if.end:
; TAILFOLD-NEXT: [[I_LCSSA:%.*]] = phi i32 [ [[I]], [[FOR_COND]] ]
; TAILFOLD-NEXT: ret i32 [[I_LCSSA]]
; TAILFOLD: if.end2:
; TAILFOLD-NEXT: [[INC_LCSSA:%.*]] = phi i32 [ [[INC]], [[FOR_BODY]] ]
; TAILFOLD-NEXT: ret i32 [[INC_LCSSA]]
;
entry:
br label %for.cond
for.cond:
%i = phi i32 [ 0, %entry ], [ %inc, %for.body ]
%cmp = icmp slt i32 %i, %n
br i1 %cmp, label %for.body, label %if.end
for.body:
%iprom = sext i32 %i to i64
%b = getelementptr inbounds i16, i16* %p, i64 %iprom
store i16 0, i16* %b, align 4
%inc = add nsw i32 %i, 1
%cmp2 = icmp slt i32 %i, 2096
br i1 %cmp2, label %for.cond, label %if.end2
if.end:
ret i32 %i
if.end2:
ret i32 %inc
}
; unique exit case but with a switch as two edges between the same pair of
; blocks is an often missed edge case
define i32 @multiple_exit_switch(i16* %p, i32 %n) {
; CHECK-LABEL: @multiple_exit_switch(
; CHECK-NEXT: entry:
; CHECK-NEXT: br label [[FOR_COND:%.*]]
; CHECK: for.cond:
; CHECK-NEXT: [[I:%.*]] = phi i32 [ 0, [[ENTRY:%.*]] ], [ [[INC:%.*]], [[FOR_COND]] ]
; CHECK-NEXT: [[IPROM:%.*]] = sext i32 [[I]] to i64
; CHECK-NEXT: [[B:%.*]] = getelementptr inbounds i16, i16* [[P:%.*]], i64 [[IPROM]]
; CHECK-NEXT: store i16 0, i16* [[B]], align 4
; CHECK-NEXT: [[INC]] = add nsw i32 [[I]], 1
; CHECK-NEXT: switch i32 [[I]], label [[FOR_COND]] [
; CHECK-NEXT: i32 2096, label [[IF_END:%.*]]
; CHECK-NEXT: i32 2097, label [[IF_END]]
; CHECK-NEXT: ]
; CHECK: if.end:
; CHECK-NEXT: [[I_LCSSA:%.*]] = phi i32 [ [[I]], [[FOR_COND]] ], [ [[I]], [[FOR_COND]] ]
; CHECK-NEXT: ret i32 [[I_LCSSA]]
;
; TAILFOLD-LABEL: @multiple_exit_switch(
; TAILFOLD-NEXT: entry:
; TAILFOLD-NEXT: br label [[FOR_COND:%.*]]
; TAILFOLD: for.cond:
; TAILFOLD-NEXT: [[I:%.*]] = phi i32 [ 0, [[ENTRY:%.*]] ], [ [[INC:%.*]], [[FOR_COND]] ]
; TAILFOLD-NEXT: [[IPROM:%.*]] = sext i32 [[I]] to i64
; TAILFOLD-NEXT: [[B:%.*]] = getelementptr inbounds i16, i16* [[P:%.*]], i64 [[IPROM]]
; TAILFOLD-NEXT: store i16 0, i16* [[B]], align 4
; TAILFOLD-NEXT: [[INC]] = add nsw i32 [[I]], 1
; TAILFOLD-NEXT: switch i32 [[I]], label [[FOR_COND]] [
; TAILFOLD-NEXT: i32 2096, label [[IF_END:%.*]]
; TAILFOLD-NEXT: i32 2097, label [[IF_END]]
; TAILFOLD-NEXT: ]
; TAILFOLD: if.end:
; TAILFOLD-NEXT: [[I_LCSSA:%.*]] = phi i32 [ [[I]], [[FOR_COND]] ], [ [[I]], [[FOR_COND]] ]
; TAILFOLD-NEXT: ret i32 [[I_LCSSA]]
;
entry:
br label %for.cond
for.cond:
%i = phi i32 [ 0, %entry ], [ %inc, %for.cond ]
%iprom = sext i32 %i to i64
%b = getelementptr inbounds i16, i16* %p, i64 %iprom
store i16 0, i16* %b, align 4
%inc = add nsw i32 %i, 1
switch i32 %i, label %for.cond [
i32 2096, label %if.end
i32 2097, label %if.end
]
if.end:
ret i32 %i
}
; multiple exit case but with a switch as multiple exiting edges from
; a single block is a commonly missed edge case
define i32 @multiple_exit_switch2(i16* %p, i32 %n) {
; CHECK-LABEL: @multiple_exit_switch2(
; CHECK-NEXT: entry:
; CHECK-NEXT: br label [[FOR_COND:%.*]]
; CHECK: for.cond:
; CHECK-NEXT: [[I:%.*]] = phi i32 [ 0, [[ENTRY:%.*]] ], [ [[INC:%.*]], [[FOR_COND]] ]
; CHECK-NEXT: [[IPROM:%.*]] = sext i32 [[I]] to i64
; CHECK-NEXT: [[B:%.*]] = getelementptr inbounds i16, i16* [[P:%.*]], i64 [[IPROM]]
; CHECK-NEXT: store i16 0, i16* [[B]], align 4
; CHECK-NEXT: [[INC]] = add nsw i32 [[I]], 1
; CHECK-NEXT: switch i32 [[I]], label [[FOR_COND]] [
; CHECK-NEXT: i32 2096, label [[IF_END:%.*]]
; CHECK-NEXT: i32 2097, label [[IF_END2:%.*]]
; CHECK-NEXT: ]
; CHECK: if.end:
; CHECK-NEXT: ret i32 0
; CHECK: if.end2:
; CHECK-NEXT: ret i32 1
;
; TAILFOLD-LABEL: @multiple_exit_switch2(
; TAILFOLD-NEXT: entry:
; TAILFOLD-NEXT: br label [[FOR_COND:%.*]]
; TAILFOLD: for.cond:
; TAILFOLD-NEXT: [[I:%.*]] = phi i32 [ 0, [[ENTRY:%.*]] ], [ [[INC:%.*]], [[FOR_COND]] ]
; TAILFOLD-NEXT: [[IPROM:%.*]] = sext i32 [[I]] to i64
; TAILFOLD-NEXT: [[B:%.*]] = getelementptr inbounds i16, i16* [[P:%.*]], i64 [[IPROM]]
; TAILFOLD-NEXT: store i16 0, i16* [[B]], align 4
; TAILFOLD-NEXT: [[INC]] = add nsw i32 [[I]], 1
; TAILFOLD-NEXT: switch i32 [[I]], label [[FOR_COND]] [
; TAILFOLD-NEXT: i32 2096, label [[IF_END:%.*]]
; TAILFOLD-NEXT: i32 2097, label [[IF_END2:%.*]]
; TAILFOLD-NEXT: ]
; TAILFOLD: if.end:
; TAILFOLD-NEXT: ret i32 0
; TAILFOLD: if.end2:
; TAILFOLD-NEXT: ret i32 1
;
entry:
br label %for.cond
for.cond:
%i = phi i32 [ 0, %entry ], [ %inc, %for.cond ]
%iprom = sext i32 %i to i64
%b = getelementptr inbounds i16, i16* %p, i64 %iprom
store i16 0, i16* %b, align 4
%inc = add nsw i32 %i, 1
switch i32 %i, label %for.cond [
i32 2096, label %if.end
i32 2097, label %if.end2
]
if.end:
ret i32 0
if.end2:
ret i32 1
}
define i32 @multiple_latch1(i16* %p) {
; CHECK-LABEL: @multiple_latch1(
; CHECK-NEXT: entry:
; CHECK-NEXT: br label [[FOR_BODY:%.*]]
; CHECK: for.body:
; CHECK-NEXT: [[I_02:%.*]] = phi i32 [ 0, [[ENTRY:%.*]] ], [ [[INC:%.*]], [[FOR_BODY_BACKEDGE:%.*]] ]
; CHECK-NEXT: [[INC]] = add nsw i32 [[I_02]], 1
; CHECK-NEXT: [[CMP:%.*]] = icmp slt i32 [[INC]], 16
; CHECK-NEXT: br i1 [[CMP]], label [[FOR_BODY_BACKEDGE]], label [[FOR_SECOND:%.*]]
; CHECK: for.second:
; CHECK-NEXT: [[IPROM:%.*]] = sext i32 [[I_02]] to i64
; CHECK-NEXT: [[B:%.*]] = getelementptr inbounds i16, i16* [[P:%.*]], i64 [[IPROM]]
; CHECK-NEXT: store i16 0, i16* [[B]], align 4
; CHECK-NEXT: [[CMPS:%.*]] = icmp sgt i32 [[INC]], 16
; CHECK-NEXT: br i1 [[CMPS]], label [[FOR_BODY_BACKEDGE]], label [[FOR_END:%.*]]
; CHECK: for.body.backedge:
; CHECK-NEXT: br label [[FOR_BODY]]
; CHECK: for.end:
; CHECK-NEXT: ret i32 0
;
; TAILFOLD-LABEL: @multiple_latch1(
; TAILFOLD-NEXT: entry:
; TAILFOLD-NEXT: br label [[FOR_BODY:%.*]]
; TAILFOLD: for.body:
; TAILFOLD-NEXT: [[I_02:%.*]] = phi i32 [ 0, [[ENTRY:%.*]] ], [ [[INC:%.*]], [[FOR_BODY_BACKEDGE:%.*]] ]
; TAILFOLD-NEXT: [[INC]] = add nsw i32 [[I_02]], 1
; TAILFOLD-NEXT: [[CMP:%.*]] = icmp slt i32 [[INC]], 16
; TAILFOLD-NEXT: br i1 [[CMP]], label [[FOR_BODY_BACKEDGE]], label [[FOR_SECOND:%.*]]
; TAILFOLD: for.second:
; TAILFOLD-NEXT: [[IPROM:%.*]] = sext i32 [[I_02]] to i64
; TAILFOLD-NEXT: [[B:%.*]] = getelementptr inbounds i16, i16* [[P:%.*]], i64 [[IPROM]]
; TAILFOLD-NEXT: store i16 0, i16* [[B]], align 4
; TAILFOLD-NEXT: [[CMPS:%.*]] = icmp sgt i32 [[INC]], 16
; TAILFOLD-NEXT: br i1 [[CMPS]], label [[FOR_BODY_BACKEDGE]], label [[FOR_END:%.*]]
; TAILFOLD: for.body.backedge:
; TAILFOLD-NEXT: br label [[FOR_BODY]]
; TAILFOLD: for.end:
; TAILFOLD-NEXT: ret i32 0
;
entry:
br label %for.body
for.body:
%i.02 = phi i32 [ 0, %entry ], [ %inc, %for.body.backedge]
%inc = add nsw i32 %i.02, 1
%cmp = icmp slt i32 %inc, 16
br i1 %cmp, label %for.body.backedge, label %for.second
for.second:
%iprom = sext i32 %i.02 to i64
%b = getelementptr inbounds i16, i16* %p, i64 %iprom
store i16 0, i16* %b, align 4
%cmps = icmp sgt i32 %inc, 16
br i1 %cmps, label %for.body.backedge, label %for.end
for.body.backedge:
br label %for.body
for.end:
ret i32 0
}
; two back branches - loop simplify with convert this to the same form
; as previous before vectorizer sees it, but show that.
define i32 @multiple_latch2(i16* %p) {
; CHECK-LABEL: @multiple_latch2(
; CHECK-NEXT: entry:
; CHECK-NEXT: br label [[FOR_BODY:%.*]]
; CHECK: for.body:
; CHECK-NEXT: [[I_02:%.*]] = phi i32 [ 0, [[ENTRY:%.*]] ], [ [[INC:%.*]], [[FOR_BODY_BACKEDGE:%.*]] ]
; CHECK-NEXT: [[INC]] = add nsw i32 [[I_02]], 1
; CHECK-NEXT: [[CMP:%.*]] = icmp slt i32 [[INC]], 16
; CHECK-NEXT: br i1 [[CMP]], label [[FOR_BODY_BACKEDGE]], label [[FOR_SECOND:%.*]]
; CHECK: for.body.backedge:
; CHECK-NEXT: br label [[FOR_BODY]]
; CHECK: for.second:
; CHECK-NEXT: [[IPROM:%.*]] = sext i32 [[I_02]] to i64
; CHECK-NEXT: [[B:%.*]] = getelementptr inbounds i16, i16* [[P:%.*]], i64 [[IPROM]]
; CHECK-NEXT: store i16 0, i16* [[B]], align 4
; CHECK-NEXT: [[CMPS:%.*]] = icmp sgt i32 [[INC]], 16
; CHECK-NEXT: br i1 [[CMPS]], label [[FOR_BODY_BACKEDGE]], label [[FOR_END:%.*]]
; CHECK: for.end:
; CHECK-NEXT: ret i32 0
;
; TAILFOLD-LABEL: @multiple_latch2(
; TAILFOLD-NEXT: entry:
; TAILFOLD-NEXT: br label [[FOR_BODY:%.*]]
; TAILFOLD: for.body:
; TAILFOLD-NEXT: [[I_02:%.*]] = phi i32 [ 0, [[ENTRY:%.*]] ], [ [[INC:%.*]], [[FOR_BODY_BACKEDGE:%.*]] ]
; TAILFOLD-NEXT: [[INC]] = add nsw i32 [[I_02]], 1
; TAILFOLD-NEXT: [[CMP:%.*]] = icmp slt i32 [[INC]], 16
; TAILFOLD-NEXT: br i1 [[CMP]], label [[FOR_BODY_BACKEDGE]], label [[FOR_SECOND:%.*]]
; TAILFOLD: for.body.backedge:
; TAILFOLD-NEXT: br label [[FOR_BODY]]
; TAILFOLD: for.second:
; TAILFOLD-NEXT: [[IPROM:%.*]] = sext i32 [[I_02]] to i64
; TAILFOLD-NEXT: [[B:%.*]] = getelementptr inbounds i16, i16* [[P:%.*]], i64 [[IPROM]]
; TAILFOLD-NEXT: store i16 0, i16* [[B]], align 4
; TAILFOLD-NEXT: [[CMPS:%.*]] = icmp sgt i32 [[INC]], 16
; TAILFOLD-NEXT: br i1 [[CMPS]], label [[FOR_BODY_BACKEDGE]], label [[FOR_END:%.*]]
; TAILFOLD: for.end:
; TAILFOLD-NEXT: ret i32 0
;
entry:
br label %for.body
for.body:
%i.02 = phi i32 [ 0, %entry ], [ %inc, %for.body ], [%inc, %for.second]
%inc = add nsw i32 %i.02, 1
%cmp = icmp slt i32 %inc, 16
br i1 %cmp, label %for.body, label %for.second
for.second:
%iprom = sext i32 %i.02 to i64
%b = getelementptr inbounds i16, i16* %p, i64 %iprom
store i16 0, i16* %b, align 4
%cmps = icmp sgt i32 %inc, 16
br i1 %cmps, label %for.body, label %for.end
for.end:
ret i32 0
}
; Check interaction between block predication and early exits. We need the
; condition on the early exit to remain dead (i.e. not be used when forming
; the predicate mask).
define void @scalar_predication(float* %addr) {
; CHECK-LABEL: @scalar_predication(
; CHECK-NEXT: entry:
; CHECK-NEXT: br i1 false, label [[SCALAR_PH:%.*]], label [[VECTOR_PH:%.*]]
; CHECK: vector.ph:
; CHECK-NEXT: br label [[VECTOR_BODY:%.*]]
; CHECK: vector.body:
; CHECK-NEXT: [[INDEX:%.*]] = phi i64 [ 0, [[VECTOR_PH]] ], [ [[INDEX_NEXT:%.*]], [[PRED_STORE_CONTINUE2:%.*]] ]
; CHECK-NEXT: [[VEC_IND:%.*]] = phi <2 x i64> [ <i64 0, i64 1>, [[VECTOR_PH]] ], [ [[VEC_IND_NEXT:%.*]], [[PRED_STORE_CONTINUE2]] ]
; CHECK-NEXT: [[TMP0:%.*]] = add i64 [[INDEX]], 0
; CHECK-NEXT: [[TMP1:%.*]] = getelementptr float, float* [[ADDR:%.*]], i64 [[TMP0]]
; CHECK-NEXT: [[TMP2:%.*]] = getelementptr float, float* [[TMP1]], i32 0
; CHECK-NEXT: [[TMP3:%.*]] = bitcast float* [[TMP2]] to <2 x float>*
; CHECK-NEXT: [[WIDE_LOAD:%.*]] = load <2 x float>, <2 x float>* [[TMP3]], align 4
; CHECK-NEXT: [[TMP4:%.*]] = fcmp oeq <2 x float> [[WIDE_LOAD]], zeroinitializer
; CHECK-NEXT: [[TMP5:%.*]] = xor <2 x i1> [[TMP4]], <i1 true, i1 true>
; CHECK-NEXT: [[TMP6:%.*]] = extractelement <2 x i1> [[TMP5]], i32 0
; CHECK-NEXT: br i1 [[TMP6]], label [[PRED_STORE_IF:%.*]], label [[PRED_STORE_CONTINUE:%.*]]
; CHECK: pred.store.if:
; CHECK-NEXT: [[TMP7:%.*]] = getelementptr float, float* [[ADDR]], i64 [[TMP0]]
; CHECK-NEXT: store float 1.000000e+01, float* [[TMP7]], align 4
; CHECK-NEXT: br label [[PRED_STORE_CONTINUE]]
; CHECK: pred.store.continue:
; CHECK-NEXT: [[TMP8:%.*]] = extractelement <2 x i1> [[TMP5]], i32 1
; CHECK-NEXT: br i1 [[TMP8]], label [[PRED_STORE_IF1:%.*]], label [[PRED_STORE_CONTINUE2]]
; CHECK: pred.store.if1:
; CHECK-NEXT: [[TMP9:%.*]] = add i64 [[INDEX]], 1
; CHECK-NEXT: [[TMP10:%.*]] = getelementptr float, float* [[ADDR]], i64 [[TMP9]]
; CHECK-NEXT: store float 1.000000e+01, float* [[TMP10]], align 4
; CHECK-NEXT: br label [[PRED_STORE_CONTINUE2]]
; CHECK: pred.store.continue2:
; CHECK-NEXT: [[INDEX_NEXT]] = add nuw i64 [[INDEX]], 2
; CHECK-NEXT: [[VEC_IND_NEXT]] = add <2 x i64> [[VEC_IND]], <i64 2, i64 2>
; CHECK-NEXT: [[TMP10:%.*]] = icmp eq i64 [[INDEX_NEXT]], 200
; CHECK-NEXT: br i1 [[TMP10]], label [[MIDDLE_BLOCK:%.*]], label [[VECTOR_BODY]], !llvm.loop [[LOOP18:![0-9]+]]
; CHECK: middle.block:
; CHECK-NEXT: br label [[SCALAR_PH]]
; CHECK: scalar.ph:
; CHECK-NEXT: [[BC_RESUME_VAL:%.*]] = phi i64 [ 200, [[MIDDLE_BLOCK]] ], [ 0, [[ENTRY:%.*]] ]
; CHECK-NEXT: br label [[LOOP_HEADER:%.*]]
; CHECK: loop.header:
; CHECK-NEXT: [[IV:%.*]] = phi i64 [ [[BC_RESUME_VAL]], [[SCALAR_PH]] ], [ [[IV_NEXT:%.*]], [[LOOP_LATCH:%.*]] ]
; CHECK-NEXT: [[GEP:%.*]] = getelementptr float, float* [[ADDR]], i64 [[IV]]
; CHECK-NEXT: [[EXITCOND_NOT:%.*]] = icmp eq i64 [[IV]], 200
; CHECK-NEXT: br i1 [[EXITCOND_NOT]], label [[EXIT:%.*]], label [[LOOP_BODY:%.*]]
; CHECK: loop.body:
; CHECK-NEXT: [[TMP11:%.*]] = load float, float* [[GEP]], align 4
; CHECK-NEXT: [[PRED:%.*]] = fcmp oeq float [[TMP11]], 0.000000e+00
; CHECK-NEXT: br i1 [[PRED]], label [[LOOP_LATCH]], label [[THEN:%.*]]
; CHECK: then:
; CHECK-NEXT: store float 1.000000e+01, float* [[GEP]], align 4
; CHECK-NEXT: br label [[LOOP_LATCH]]
; CHECK: loop.latch:
; CHECK-NEXT: [[IV_NEXT]] = add nuw nsw i64 [[IV]], 1
; CHECK-NEXT: br label [[LOOP_HEADER]], !llvm.loop [[LOOP19:![0-9]+]]
; CHECK: exit:
; CHECK-NEXT: ret void
;
; TAILFOLD-LABEL: @scalar_predication(
; TAILFOLD-NEXT: entry:
; TAILFOLD-NEXT: br label [[LOOP_HEADER:%.*]]
; TAILFOLD: loop.header:
; TAILFOLD-NEXT: [[IV:%.*]] = phi i64 [ 0, [[ENTRY:%.*]] ], [ [[IV_NEXT:%.*]], [[LOOP_LATCH:%.*]] ]
; TAILFOLD-NEXT: [[GEP:%.*]] = getelementptr float, float* [[ADDR:%.*]], i64 [[IV]]
; TAILFOLD-NEXT: [[EXITCOND_NOT:%.*]] = icmp eq i64 [[IV]], 200
; TAILFOLD-NEXT: br i1 [[EXITCOND_NOT]], label [[EXIT:%.*]], label [[LOOP_BODY:%.*]]
; TAILFOLD: loop.body:
; TAILFOLD-NEXT: [[TMP0:%.*]] = load float, float* [[GEP]], align 4
; TAILFOLD-NEXT: [[PRED:%.*]] = fcmp oeq float [[TMP0]], 0.000000e+00
; TAILFOLD-NEXT: br i1 [[PRED]], label [[LOOP_LATCH]], label [[THEN:%.*]]
; TAILFOLD: then:
; TAILFOLD-NEXT: store float 1.000000e+01, float* [[GEP]], align 4
; TAILFOLD-NEXT: br label [[LOOP_LATCH]]
; TAILFOLD: loop.latch:
; TAILFOLD-NEXT: [[IV_NEXT]] = add nuw nsw i64 [[IV]], 1
; TAILFOLD-NEXT: br label [[LOOP_HEADER]]
; TAILFOLD: exit:
; TAILFOLD-NEXT: ret void
;
entry:
br label %loop.header
loop.header:
%iv = phi i64 [ 0, %entry ], [ %iv.next, %loop.latch ]
%gep = getelementptr float, float* %addr, i64 %iv
%exitcond.not = icmp eq i64 %iv, 200
br i1 %exitcond.not, label %exit, label %loop.body
loop.body:
%0 = load float, float* %gep, align 4
%pred = fcmp oeq float %0, 0.0
br i1 %pred, label %loop.latch, label %then
then:
store float 10.0, float* %gep, align 4
br label %loop.latch
loop.latch:
%iv.next = add nuw nsw i64 %iv, 1
br label %loop.header
exit:
ret void
}
define i32 @me_reduction(i32* %addr) {
; CHECK-LABEL: @me_reduction(
; CHECK-NEXT: entry:
; CHECK-NEXT: br i1 false, label [[SCALAR_PH:%.*]], label [[VECTOR_PH:%.*]]
; CHECK: vector.ph:
; CHECK-NEXT: br label [[VECTOR_BODY:%.*]]
; CHECK: vector.body:
; CHECK-NEXT: [[INDEX:%.*]] = phi i64 [ 0, [[VECTOR_PH]] ], [ [[INDEX_NEXT:%.*]], [[VECTOR_BODY]] ]
; CHECK-NEXT: [[VEC_IND:%.*]] = phi <2 x i64> [ <i64 0, i64 1>, [[VECTOR_PH]] ], [ [[VEC_IND_NEXT:%.*]], [[VECTOR_BODY]] ]
; CHECK-NEXT: [[VEC_PHI:%.*]] = phi <2 x i32> [ zeroinitializer, [[VECTOR_PH]] ], [ [[TMP5:%.*]], [[VECTOR_BODY]] ]
; CHECK-NEXT: [[TMP0:%.*]] = add i64 [[INDEX]], 0
; CHECK-NEXT: [[TMP1:%.*]] = add i64 [[INDEX]], 1
; CHECK-NEXT: [[TMP2:%.*]] = getelementptr i32, i32* [[ADDR:%.*]], i64 [[TMP0]]
; CHECK-NEXT: [[TMP3:%.*]] = getelementptr i32, i32* [[TMP2]], i32 0
; CHECK-NEXT: [[TMP4:%.*]] = bitcast i32* [[TMP3]] to <2 x i32>*
; CHECK-NEXT: [[WIDE_LOAD:%.*]] = load <2 x i32>, <2 x i32>* [[TMP4]], align 4
; CHECK-NEXT: [[TMP5]] = add <2 x i32> [[VEC_PHI]], [[WIDE_LOAD]]
; CHECK-NEXT: [[INDEX_NEXT]] = add nuw i64 [[INDEX]], 2
; CHECK-NEXT: [[VEC_IND_NEXT]] = add <2 x i64> [[VEC_IND]], <i64 2, i64 2>
; CHECK-NEXT: [[TMP6:%.*]] = icmp eq i64 [[INDEX_NEXT]], 200
; CHECK-NEXT: br i1 [[TMP6]], label [[MIDDLE_BLOCK:%.*]], label [[VECTOR_BODY]], !llvm.loop [[LOOP20:![0-9]+]]
; CHECK: middle.block:
; CHECK-NEXT: [[TMP7:%.*]] = call i32 @llvm.vector.reduce.add.v2i32(<2 x i32> [[TMP5]])
; CHECK-NEXT: br label [[SCALAR_PH]]
; CHECK: scalar.ph:
; CHECK-NEXT: [[BC_RESUME_VAL:%.*]] = phi i64 [ 200, [[MIDDLE_BLOCK]] ], [ 0, [[ENTRY:%.*]] ]
; CHECK-NEXT: [[BC_MERGE_RDX:%.*]] = phi i32 [ 0, [[ENTRY]] ], [ [[TMP7]], [[MIDDLE_BLOCK]] ]
; CHECK-NEXT: br label [[LOOP_HEADER:%.*]]
; CHECK: loop.header:
; CHECK-NEXT: [[IV:%.*]] = phi i64 [ [[BC_RESUME_VAL]], [[SCALAR_PH]] ], [ [[IV_NEXT:%.*]], [[LOOP_LATCH:%.*]] ]
; CHECK-NEXT: [[ACCUM:%.*]] = phi i32 [ [[BC_MERGE_RDX]], [[SCALAR_PH]] ], [ [[ACCUM_NEXT:%.*]], [[LOOP_LATCH]] ]
; CHECK-NEXT: [[GEP:%.*]] = getelementptr i32, i32* [[ADDR]], i64 [[IV]]
; CHECK-NEXT: [[EXITCOND_NOT:%.*]] = icmp eq i64 [[IV]], 200
; CHECK-NEXT: br i1 [[EXITCOND_NOT]], label [[EXIT:%.*]], label [[LOOP_LATCH]]
; CHECK: loop.latch:
; CHECK-NEXT: [[TMP8:%.*]] = load i32, i32* [[GEP]], align 4
; CHECK-NEXT: [[ACCUM_NEXT]] = add i32 [[ACCUM]], [[TMP8]]
; CHECK-NEXT: [[IV_NEXT]] = add nuw nsw i64 [[IV]], 1
; CHECK-NEXT: [[EXITCOND2_NOT:%.*]] = icmp eq i64 [[IV]], 400
; CHECK-NEXT: br i1 [[EXITCOND2_NOT]], label [[EXIT]], label [[LOOP_HEADER]], !llvm.loop [[LOOP21:![0-9]+]]
; CHECK: exit:
; CHECK-NEXT: [[LCSSA:%.*]] = phi i32 [ 0, [[LOOP_HEADER]] ], [ [[ACCUM_NEXT]], [[LOOP_LATCH]] ]
; CHECK-NEXT: ret i32 [[LCSSA]]
;
; TAILFOLD-LABEL: @me_reduction(
; TAILFOLD-NEXT: entry:
; TAILFOLD-NEXT: br label [[LOOP_HEADER:%.*]]
; TAILFOLD: loop.header:
; TAILFOLD-NEXT: [[IV:%.*]] = phi i64 [ 0, [[ENTRY:%.*]] ], [ [[IV_NEXT:%.*]], [[LOOP_LATCH:%.*]] ]
; TAILFOLD-NEXT: [[ACCUM:%.*]] = phi i32 [ 0, [[ENTRY]] ], [ [[ACCUM_NEXT:%.*]], [[LOOP_LATCH]] ]
; TAILFOLD-NEXT: [[GEP:%.*]] = getelementptr i32, i32* [[ADDR:%.*]], i64 [[IV]]
; TAILFOLD-NEXT: [[EXITCOND_NOT:%.*]] = icmp eq i64 [[IV]], 200
; TAILFOLD-NEXT: br i1 [[EXITCOND_NOT]], label [[EXIT:%.*]], label [[LOOP_LATCH]]
; TAILFOLD: loop.latch:
; TAILFOLD-NEXT: [[TMP0:%.*]] = load i32, i32* [[GEP]], align 4
; TAILFOLD-NEXT: [[ACCUM_NEXT]] = add i32 [[ACCUM]], [[TMP0]]
; TAILFOLD-NEXT: [[IV_NEXT]] = add nuw nsw i64 [[IV]], 1
; TAILFOLD-NEXT: [[EXITCOND2_NOT:%.*]] = icmp eq i64 [[IV]], 400
; TAILFOLD-NEXT: br i1 [[EXITCOND2_NOT]], label [[EXIT]], label [[LOOP_HEADER]]
; TAILFOLD: exit:
; TAILFOLD-NEXT: [[LCSSA:%.*]] = phi i32 [ 0, [[LOOP_HEADER]] ], [ [[ACCUM_NEXT]], [[LOOP_LATCH]] ]
; TAILFOLD-NEXT: ret i32 [[LCSSA]]
;
entry:
br label %loop.header
loop.header:
%iv = phi i64 [ 0, %entry ], [ %iv.next, %loop.latch ]
%accum = phi i32 [0, %entry], [%accum.next, %loop.latch]
%gep = getelementptr i32, i32* %addr, i64 %iv
%exitcond.not = icmp eq i64 %iv, 200
br i1 %exitcond.not, label %exit, label %loop.latch
loop.latch:
%0 = load i32, i32* %gep, align 4
%accum.next = add i32 %accum, %0
%iv.next = add nuw nsw i64 %iv, 1
%exitcond2.not = icmp eq i64 %iv, 400
br i1 %exitcond2.not, label %exit, label %loop.header
exit:
%lcssa = phi i32 [0, %loop.header], [%accum.next, %loop.latch]
ret i32 %lcssa
}
; TODO: The current definition of reduction is too strict, we can vectorize
; this. There's an analogous single exit case where we extract the N-1
; value of the reduction that we can also handle. If we fix the later, the
; multiple exit case probably falls out.
define i32 @me_reduction2(i32* %addr) {
; CHECK-LABEL: @me_reduction2(
; CHECK-NEXT: entry:
; CHECK-NEXT: br label [[LOOP_HEADER:%.*]]
; CHECK: loop.header:
; CHECK-NEXT: [[IV:%.*]] = phi i64 [ 0, [[ENTRY:%.*]] ], [ [[IV_NEXT:%.*]], [[LOOP_LATCH:%.*]] ]
; CHECK-NEXT: [[ACCUM:%.*]] = phi i32 [ 0, [[ENTRY]] ], [ [[ACCUM_NEXT:%.*]], [[LOOP_LATCH]] ]
; CHECK-NEXT: [[GEP:%.*]] = getelementptr i32, i32* [[ADDR:%.*]], i64 [[IV]]
; CHECK-NEXT: [[EXITCOND_NOT:%.*]] = icmp eq i64 [[IV]], 200
; CHECK-NEXT: br i1 [[EXITCOND_NOT]], label [[EXIT:%.*]], label [[LOOP_LATCH]]
; CHECK: loop.latch:
; CHECK-NEXT: [[TMP0:%.*]] = load i32, i32* [[GEP]], align 4
; CHECK-NEXT: [[ACCUM_NEXT]] = add i32 [[ACCUM]], [[TMP0]]
; CHECK-NEXT: [[IV_NEXT]] = add nuw nsw i64 [[IV]], 1
; CHECK-NEXT: br label [[LOOP_HEADER]]
; CHECK: exit:
; CHECK-NEXT: [[ACCUM_LCSSA:%.*]] = phi i32 [ [[ACCUM]], [[LOOP_HEADER]] ]
; CHECK-NEXT: ret i32 [[ACCUM_LCSSA]]
;
; TAILFOLD-LABEL: @me_reduction2(
; TAILFOLD-NEXT: entry:
; TAILFOLD-NEXT: br label [[LOOP_HEADER:%.*]]
; TAILFOLD: loop.header:
; TAILFOLD-NEXT: [[IV:%.*]] = phi i64 [ 0, [[ENTRY:%.*]] ], [ [[IV_NEXT:%.*]], [[LOOP_LATCH:%.*]] ]
; TAILFOLD-NEXT: [[ACCUM:%.*]] = phi i32 [ 0, [[ENTRY]] ], [ [[ACCUM_NEXT:%.*]], [[LOOP_LATCH]] ]
; TAILFOLD-NEXT: [[GEP:%.*]] = getelementptr i32, i32* [[ADDR:%.*]], i64 [[IV]]
; TAILFOLD-NEXT: [[EXITCOND_NOT:%.*]] = icmp eq i64 [[IV]], 200
; TAILFOLD-NEXT: br i1 [[EXITCOND_NOT]], label [[EXIT:%.*]], label [[LOOP_LATCH]]
; TAILFOLD: loop.latch:
; TAILFOLD-NEXT: [[TMP0:%.*]] = load i32, i32* [[GEP]], align 4
; TAILFOLD-NEXT: [[ACCUM_NEXT]] = add i32 [[ACCUM]], [[TMP0]]
; TAILFOLD-NEXT: [[IV_NEXT]] = add nuw nsw i64 [[IV]], 1
; TAILFOLD-NEXT: br label [[LOOP_HEADER]]
; TAILFOLD: exit:
; TAILFOLD-NEXT: [[ACCUM_LCSSA:%.*]] = phi i32 [ [[ACCUM]], [[LOOP_HEADER]] ]
; TAILFOLD-NEXT: ret i32 [[ACCUM_LCSSA]]
;
entry:
br label %loop.header
loop.header:
%iv = phi i64 [ 0, %entry ], [ %iv.next, %loop.latch ]
%accum = phi i32 [0, %entry], [%accum.next, %loop.latch]
%gep = getelementptr i32, i32* %addr, i64 %iv
%exitcond.not = icmp eq i64 %iv, 200
br i1 %exitcond.not, label %exit, label %loop.latch
loop.latch:
%0 = load i32, i32* %gep, align 4
%accum.next = add i32 %accum, %0
%iv.next = add nuw nsw i64 %iv, 1
br label %loop.header
exit:
ret i32 %accum
}
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