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clang-p2996/llvm/test/Transforms/LoopVectorize/uniform-blend.ll
Florian Hahn da740492b0 [VPlan] Remove dead header-phi recipes. 
This patch adds a new transform to remove dead recipes. For now, it only
removes dead recipes in the header, to keep the number tests that require
updating manageable. Future patches will extend this to remove dead
recipes across the whole plan.

Reviewed By: Ayal

Differential Revision: https://reviews.llvm.org/D118051
2022-02-26 16:26:39 +00:00

160 lines
8.2 KiB
LLVM
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; RUN: opt -loop-vectorize -force-vector-width=4 -S %s | FileCheck %s
@dst = external global [32 x i16], align 1
define void @blend_uniform_iv_trunc(i1 %c) {
; CHECK-LABEL: @blend_uniform_iv_trunc(
; CHECK: vector.ph:
; CHECK-NEXT: [[MASK0:%.*]] = insertelement <4 x i1> poison, i1 %c, i32 0
; CHECK-NEXT: [[MASK1:%.*]] = shufflevector <4 x i1> [[MASK0]], <4 x i1> poison, <4 x i32> zeroinitializer
; CHECK: vector.body:
; CHECK-NEXT: [[INDEX:%.*]] = phi i64 [ 0, %vector.ph ], [ [[INDEX_NEXT:%.*]], %vector.body ]
; CHECK-NEXT: [[TMP1:%.*]] = trunc i64 [[INDEX]] to i16
; CHECK-NEXT: [[TMP2:%.*]] = add i16 [[TMP1]], 0
; CHECK-NEXT: [[BROADCAST_SPLATINSERT1:%.*]] = insertelement <4 x i16> poison, i16 [[TMP2]], i32 0
; CHECK-NEXT: [[BROADCAST_SPLAT2:%.*]] = shufflevector <4 x i16> [[BROADCAST_SPLATINSERT1]], <4 x i16> poison, <4 x i32> zeroinitializer
; CHECK-NEXT: [[TMP3:%.*]] = xor <4 x i1> [[MASK1]], <i1 true, i1 true, i1 true, i1 true>
; CHECK-NEXT: [[PREDPHI:%.*]] = select <4 x i1> [[MASK1]], <4 x i16> [[BROADCAST_SPLAT2]], <4 x i16> undef
; CHECK-NEXT: [[TMP4:%.*]] = extractelement <4 x i16> [[PREDPHI]], i32 0
; CHECK-NEXT: [[TMP5:%.*]] = getelementptr inbounds [32 x i16], [32 x i16]* @dst, i16 0, i16 [[TMP4]]
; CHECK-NEXT: [[TMP6:%.*]] = getelementptr inbounds i16, i16* [[TMP5]], i32 0
; CHECK-NEXT: [[TMP7:%.*]] = bitcast i16* [[TMP6]] to <4 x i16>*
; CHECK-NEXT: store <4 x i16> zeroinitializer, <4 x i16>* [[TMP7]], align 2
; CHECK-NEXT: [[INDEX_NEXT]] = add nuw i64 [[INDEX]], 4
; CHECK-NEXT: [[TMP8:%.*]] = icmp eq i64 [[INDEX_NEXT]], 32
; CHECK-NEXT: br i1 [[TMP8]], label %middle.block, label %vector.body
;
entry:
br label %loop.header
loop.header: ; preds = %loop.latch, %entry
%iv = phi i64 [ 0, %entry ], [ %iv.next, %loop.latch ]
%iv.trunc.2 = trunc i64 %iv to i16
br i1 %c, label %loop.next, label %loop.latch
loop.next: ; preds = %loop.header
br label %loop.latch
loop.latch: ; preds = %loop.next, %loop.header
%blend = phi i16 [ undef, %loop.header ], [ %iv.trunc.2, %loop.next ]
%dst.ptr = getelementptr inbounds [32 x i16], [32 x i16]* @dst, i16 0, i16 %blend
store i16 0, i16* %dst.ptr
%iv.next = add nuw nsw i64 %iv, 1
%cmp439 = icmp ult i64 %iv, 31
br i1 %cmp439, label %loop.header, label %exit
exit: ; preds = %loop.latch
ret void
}
define void @blend_uniform_iv(i1 %c) {
; CHECK-LABEL: @blend_uniform_iv(
; CHECK: vector.ph:
; CHECK-NEXT: [[MASK0:%.*]] = insertelement <4 x i1> poison, i1 %c, i32 0
; CHECK-NEXT: [[MASK1:%.*]] = shufflevector <4 x i1> [[MASK0]], <4 x i1> poison, <4 x i32> zeroinitializer
; CHECK: vector.body:
; CHECK-NEXT: [[INDEX:%.*]] = phi i64 [ 0, %vector.ph ], [ [[INDEX_NEXT:%.*]], %vector.body ]
; CHECK-NEXT: [[TMP0:%.*]] = add i64 [[INDEX]], 0
; CHECK-NEXT: [[BROADCAST_SPLATINSERT1:%.*]] = insertelement <4 x i64> poison, i64 [[TMP0]], i32 0
; CHECK-NEXT: [[BROADCAST_SPLAT2:%.*]] = shufflevector <4 x i64> [[BROADCAST_SPLATINSERT1]], <4 x i64> poison, <4 x i32> zeroinitializer
; CHECK-NEXT: [[TMP1:%.*]] = xor <4 x i1> [[MASK1]], <i1 true, i1 true, i1 true, i1 true>
; CHECK-NEXT: [[PREDPHI:%.*]] = select <4 x i1> [[MASK1]], <4 x i64> [[BROADCAST_SPLAT2]], <4 x i64> undef
; CHECK-NEXT: [[TMP2:%.*]] = extractelement <4 x i64> [[PREDPHI]], i32 0
; CHECK-NEXT: [[TMP3:%.*]] = getelementptr inbounds [32 x i16], [32 x i16]* @dst, i16 0, i64 [[TMP2]]
; CHECK-NEXT: [[TMP4:%.*]] = getelementptr inbounds i16, i16* [[TMP3]], i32 0
; CHECK-NEXT: [[TMP5:%.*]] = bitcast i16* [[TMP4]] to <4 x i16>*
; CHECK-NEXT: store <4 x i16> zeroinitializer, <4 x i16>* [[TMP5]], align 2
; CHECK-NEXT: [[INDEX_NEXT]] = add nuw i64 [[INDEX]], 4
; CHECK-NEXT: [[TMP6:%.*]] = icmp eq i64 [[INDEX_NEXT]], 32
; CHECK-NEXT: br i1 [[TMP6]], label %middle.block, label %vector.body
;
entry:
br label %loop.header
loop.header: ; preds = %loop.latch, %entry
%iv = phi i64 [ 0, %entry ], [ %iv.next, %loop.latch ]
br i1 %c, label %loop.next, label %loop.latch
loop.next: ; preds = %loop.header
br label %loop.latch
loop.latch: ; preds = %loop.next, %loop.header
%blend = phi i64 [ undef, %loop.header ], [ %iv, %loop.next ]
%dst.ptr = getelementptr inbounds [32 x i16], [32 x i16]* @dst, i16 0, i64 %blend
store i16 0, i16* %dst.ptr
%iv.next = add nuw nsw i64 %iv, 1
%cmp439 = icmp ult i64 %iv, 31
br i1 %cmp439, label %loop.header, label %exit
exit: ; preds = %loop.latch
ret void
}
define void @blend_chain_iv(i1 %c) {
; CHECK-LABEL: @blend_chain_iv(
; CHECK: vector.ph:
; CHECK-NEXT: [[MASK0:%.*]] = insertelement <4 x i1> poison, i1 %c, i32 0
; CHECK-NEXT: [[MASK1:%.*]] = shufflevector <4 x i1> [[MASK0]], <4 x i1> poison, <4 x i32> zeroinitializer
; CHECK: vector.body:
; CHECK-NEXT: [[INDEX:%.*]] = phi i64 [ 0, %vector.ph ], [ [[INDEX_NEXT:%.*]], %vector.body ]
; CHECK-NEXT: [[VEC_IND:%.*]] = phi <4 x i64> [ <i64 0, i64 1, i64 2, i64 3>, %vector.ph ], [ [[VEC_IND_NEXT:%.*]], %vector.body ]
; CHECK-NEXT: [[TMP0:%.*]] = add i64 [[INDEX]], 0
; CHECK-NEXT: [[TMP1:%.*]] = add i64 [[INDEX]], 1
; CHECK-NEXT: [[TMP2:%.*]] = add i64 [[INDEX]], 2
; CHECK-NEXT: [[TMP3:%.*]] = add i64 [[INDEX]], 3
; CHECK-NEXT: [[TMP4:%.*]] = xor <4 x i1> [[MASK1]], <i1 true, i1 true, i1 true, i1 true>
; CHECK-NEXT: [[TMP5:%.*]] = select <4 x i1> [[MASK1]], <4 x i1> [[TMP4]], <4 x i1> zeroinitializer
; CHECK-NEXT: [[TMP6:%.*]] = select <4 x i1> [[MASK1]], <4 x i1> [[MASK1]], <4 x i1> zeroinitializer
; CHECK-NEXT: [[PREDPHI:%.*]] = select <4 x i1> [[TMP6]], <4 x i64> [[VEC_IND]], <4 x i64> undef
; CHECK-NEXT: [[TMP7:%.*]] = xor <4 x i1> [[MASK1]], <i1 true, i1 true, i1 true, i1 true>
; CHECK-NEXT: [[TMP8:%.*]] = or <4 x i1> [[TMP6]], [[TMP5]]
; CHECK-NEXT: [[PREDPHI1:%.*]] = select <4 x i1> [[TMP8]], <4 x i64> [[PREDPHI]], <4 x i64> undef
; CHECK-NEXT: [[TMP9:%.*]] = extractelement <4 x i64> [[PREDPHI1]], i32 0
; CHECK-NEXT: [[TMP10:%.*]] = getelementptr inbounds [32 x i16], [32 x i16]* @dst, i16 0, i64 [[TMP9]]
; CHECK-NEXT: [[TMP11:%.*]] = extractelement <4 x i64> [[PREDPHI1]], i32 1
; CHECK-NEXT: [[TMP12:%.*]] = getelementptr inbounds [32 x i16], [32 x i16]* @dst, i16 0, i64 [[TMP11]]
; CHECK-NEXT: [[TMP13:%.*]] = extractelement <4 x i64> [[PREDPHI1]], i32 2
; CHECK-NEXT: [[TMP14:%.*]] = getelementptr inbounds [32 x i16], [32 x i16]* @dst, i16 0, i64 [[TMP13]]
; CHECK-NEXT: [[TMP15:%.*]] = extractelement <4 x i64> [[PREDPHI1]], i32 3
; CHECK-NEXT: [[TMP16:%.*]] = getelementptr inbounds [32 x i16], [32 x i16]* @dst, i16 0, i64 [[TMP15]]
; CHECK-NEXT: store i16 0, i16* [[TMP10]], align 2
; CHECK-NEXT: store i16 0, i16* [[TMP12]], align 2
; CHECK-NEXT: store i16 0, i16* [[TMP14]], align 2
; CHECK-NEXT: store i16 0, i16* [[TMP16]], align 2
; CHECK-NEXT: [[INDEX_NEXT]] = add nuw i64 [[INDEX]], 4
; CHECK-NEXT: [[VEC_IND_NEXT]] = add <4 x i64> [[VEC_IND]], <i64 4, i64 4, i64 4, i64 4>
; CHECK-NEXT: [[TMP17:%.*]] = icmp eq i64 [[INDEX_NEXT]], 32
; CHECK-NEXT: br i1 [[TMP17]], label %middle.block, label %vector.body
;
entry:
br label %loop.header
loop.header: ; preds = %loop.latch, %entry
%iv = phi i64 [ 0, %entry ], [ %iv.next, %loop.latch ]
br i1 %c, label %loop.next, label %loop.latch
loop.next: ; preds = %loop.header
br i1 %c, label %loop.next.2, label %loop.next.3
loop.next.2:
br label %loop.next.3
loop.next.3:
%blend.1 = phi i64 [ undef, %loop.next ], [ %iv, %loop.next.2 ]
br label %loop.latch
loop.latch: ; preds = %loop.next, %loop.header
%blend = phi i64 [ undef, %loop.header ], [ %blend.1, %loop.next.3 ]
%dst.ptr = getelementptr inbounds [32 x i16], [32 x i16]* @dst, i16 0, i64 %blend
store i16 0, i16* %dst.ptr
%iv.next = add nuw nsw i64 %iv, 1
%cmp439 = icmp ult i64 %iv, 31
br i1 %cmp439, label %loop.header, label %exit
exit: ; preds = %loop.latch
ret void
}
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