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clang-p2996/llvm/test/Transforms/InstCombine/vec_phi_extract.ll
Philip Reames e6ad9ef4e7 [instcombine] Canonicalize constant index type to i64 for extractelement/insertelement 
The basic idea to this is that a) having a single canonical type makes CSE easier, and b) many of our transforms are inconsistent about which types we end up with based on visit order.

I'm restricting this to constants as for non-constants, we'd have to decide whether the simplicity was worth extra instructions. For constants, there are no extra instructions.

We chose the canonical type as i64 arbitrarily.  We might consider changing this to something else in the future if we have cause.

Differential Revision: https://reviews.llvm.org/D115387
2021-12-13 16:56:22 -08:00

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; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
; RUN: opt < %s -instcombine -S | FileCheck %s
define void @f(i64 %val, i32 %limit, i32 *%ptr) {
; CHECK-LABEL: @f(
; CHECK-NEXT: entry:
; CHECK-NEXT: [[TMP0:%.*]] = trunc i64 [[VAL:%.*]] to i32
; CHECK-NEXT: br label [[LOOP:%.*]]
; CHECK: loop:
; CHECK-NEXT: [[TMP1:%.*]] = phi i32 [ [[TMP0]], [[ENTRY:%.*]] ], [ [[TMP5:%.*]], [[LOOP]] ]
; CHECK-NEXT: [[END:%.*]] = icmp ult i32 [[TMP1]], [[LIMIT:%.*]]
; CHECK-NEXT: [[TMP2:%.*]] = add i32 [[TMP1]], 10
; CHECK-NEXT: [[TMP3:%.*]] = sext i32 [[TMP1]] to i64
; CHECK-NEXT: [[TMP4:%.*]] = getelementptr i32, i32* [[PTR:%.*]], i64 [[TMP3]]
; CHECK-NEXT: store i32 [[TMP2]], i32* [[TMP4]], align 4
; CHECK-NEXT: [[TMP5]] = add i32 [[TMP1]], 16
; CHECK-NEXT: br i1 [[END]], label [[LOOP]], label [[RET:%.*]]
; CHECK: ret:
; CHECK-NEXT: ret void
;
entry:
%tempvector = insertelement <16 x i64> undef, i64 %val, i32 0
%vector = shufflevector <16 x i64> %tempvector, <16 x i64> undef, <16 x i32> zeroinitializer
%0 = add <16 x i64> %vector, <i64 0, i64 1, i64 2, i64 3, i64 4, i64 5, i64 6, i64 7, i64 8, i64 9, i64 10, i64 11, i64 12, i64 13, i64 14, i64 15>
%1 = trunc <16 x i64> %0 to <16 x i32>
br label %loop
loop:
%2 = phi <16 x i32> [ %1, %entry ], [ %inc, %loop ]
%elt = extractelement <16 x i32> %2, i32 0
%end = icmp ult i32 %elt, %limit
%3 = add i32 10, %elt
%4 = sext i32 %elt to i64
%5 = getelementptr i32, i32* %ptr, i64 %4
store i32 %3, i32* %5
%inc = add <16 x i32> %2, <i32 16, i32 16, i32 16, i32 16, i32 16, i32 16, i32 16, i32 16, i32 16, i32 16, i32 16, i32 16, i32 16, i32 16, i32 16, i32 16>
br i1 %end, label %loop, label %ret
ret:
ret void
}
define void @copy(i64 %val, i32 %limit, i32 *%ptr) {
; CHECK-LABEL: @copy(
; CHECK-NEXT: entry:
; CHECK-NEXT: [[TMP0:%.*]] = trunc i64 [[VAL:%.*]] to i32
; CHECK-NEXT: br label [[LOOP:%.*]]
; CHECK: loop:
; CHECK-NEXT: [[TMP1:%.*]] = phi i32 [ [[TMP0]], [[ENTRY:%.*]] ], [ [[TMP5:%.*]], [[LOOP]] ]
; CHECK-NEXT: [[END:%.*]] = icmp ult i32 [[TMP1]], [[LIMIT:%.*]]
; CHECK-NEXT: [[TMP2:%.*]] = add i32 [[TMP1]], 10
; CHECK-NEXT: [[TMP3:%.*]] = sext i32 [[TMP1]] to i64
; CHECK-NEXT: [[TMP4:%.*]] = getelementptr i32, i32* [[PTR:%.*]], i64 [[TMP3]]
; CHECK-NEXT: store i32 [[TMP2]], i32* [[TMP4]], align 4
; CHECK-NEXT: [[TMP5]] = add i32 [[TMP1]], 16
; CHECK-NEXT: br i1 [[END]], label [[LOOP]], label [[RET:%.*]]
; CHECK: ret:
; CHECK-NEXT: ret void
;
entry:
%tempvector = insertelement <16 x i64> undef, i64 %val, i32 0
%vector = shufflevector <16 x i64> %tempvector, <16 x i64> undef, <16 x i32> zeroinitializer
%0 = add <16 x i64> %vector, <i64 0, i64 1, i64 2, i64 3, i64 4, i64 5, i64 6, i64 7, i64 8, i64 9, i64 10, i64 11, i64 12, i64 13, i64 14, i64 15>
%1 = trunc <16 x i64> %0 to <16 x i32>
br label %loop
loop:
%2 = phi <16 x i32> [ %1, %entry ], [ %inc, %loop ]
%elt = extractelement <16 x i32> %2, i32 0
%eltcopy = extractelement <16 x i32> %2, i32 0
%end = icmp ult i32 %elt, %limit
%3 = add i32 10, %eltcopy
%4 = sext i32 %elt to i64
%5 = getelementptr i32, i32* %ptr, i64 %4
store i32 %3, i32* %5
%inc = add <16 x i32> %2, <i32 16, i32 16, i32 16, i32 16, i32 16, i32 16, i32 16, i32 16, i32 16, i32 16, i32 16, i32 16, i32 16, i32 16, i32 16, i32 16>
br i1 %end, label %loop, label %ret
ret:
ret void
}
define void @nocopy(i64 %val, i32 %limit, i32 *%ptr) {
; CHECK-LABEL: @nocopy(
; CHECK-NEXT: entry:
; CHECK-NEXT: [[TMP0:%.*]] = trunc i64 [[VAL:%.*]] to i32
; CHECK-NEXT: [[TMP1:%.*]] = insertelement <16 x i32> undef, i32 [[TMP0]], i64 0
; CHECK-NEXT: [[TMP2:%.*]] = shufflevector <16 x i32> [[TMP1]], <16 x i32> poison, <16 x i32> zeroinitializer
; CHECK-NEXT: [[TMP3:%.*]] = add <16 x i32> [[TMP2]], <i32 0, i32 1, i32 2, i32 3, i32 4, i32 5, i32 6, i32 7, i32 8, i32 9, i32 10, i32 11, i32 12, i32 13, i32 14, i32 15>
; CHECK-NEXT: br label [[LOOP:%.*]]
; CHECK: loop:
; CHECK-NEXT: [[TMP4:%.*]] = phi <16 x i32> [ [[TMP3]], [[ENTRY:%.*]] ], [ [[INC:%.*]], [[LOOP]] ]
; CHECK-NEXT: [[ELT:%.*]] = extractelement <16 x i32> [[TMP4]], i64 0
; CHECK-NEXT: [[ELTCOPY:%.*]] = extractelement <16 x i32> [[TMP4]], i64 1
; CHECK-NEXT: [[END:%.*]] = icmp ult i32 [[ELT]], [[LIMIT:%.*]]
; CHECK-NEXT: [[TMP5:%.*]] = add i32 [[ELTCOPY]], 10
; CHECK-NEXT: [[TMP6:%.*]] = sext i32 [[ELT]] to i64
; CHECK-NEXT: [[TMP7:%.*]] = getelementptr i32, i32* [[PTR:%.*]], i64 [[TMP6]]
; CHECK-NEXT: store i32 [[TMP5]], i32* [[TMP7]], align 4
; CHECK-NEXT: [[INC]] = add <16 x i32> [[TMP4]], <i32 16, i32 16, i32 16, i32 16, i32 16, i32 16, i32 16, i32 16, i32 16, i32 16, i32 16, i32 16, i32 16, i32 16, i32 16, i32 16>
; CHECK-NEXT: br i1 [[END]], label [[LOOP]], label [[RET:%.*]]
; CHECK: ret:
; CHECK-NEXT: ret void
;
entry:
%tempvector = insertelement <16 x i64> undef, i64 %val, i32 0
%vector = shufflevector <16 x i64> %tempvector, <16 x i64> undef, <16 x i32> zeroinitializer
%0 = add <16 x i64> %vector, <i64 0, i64 1, i64 2, i64 3, i64 4, i64 5, i64 6, i64 7, i64 8, i64 9, i64 10, i64 11, i64 12, i64 13, i64 14, i64 15>
%1 = trunc <16 x i64> %0 to <16 x i32>
br label %loop
loop:
%2 = phi <16 x i32> [ %1, %entry ], [ %inc, %loop ]
%elt = extractelement <16 x i32> %2, i32 0
%eltcopy = extractelement <16 x i32> %2, i32 1
%end = icmp ult i32 %elt, %limit
%3 = add i32 10, %eltcopy
%4 = sext i32 %elt to i64
%5 = getelementptr i32, i32* %ptr, i64 %4
store i32 %3, i32* %5
%inc = add <16 x i32> %2, <i32 16, i32 16, i32 16, i32 16, i32 16, i32 16, i32 16, i32 16, i32 16, i32 16, i32 16, i32 16, i32 16, i32 16, i32 16, i32 16>
br i1 %end, label %loop, label %ret
ret:
ret void
}
define i1 @g(<3 x i32> %input_2) {
; CHECK-LABEL: @g(
; CHECK-NEXT: entry:
; CHECK-NEXT: [[TMP0:%.*]] = extractelement <3 x i32> [[INPUT_2:%.*]], i64 0
; CHECK-NEXT: br label [[FOR_COND:%.*]]
; CHECK: for.cond:
; CHECK-NEXT: [[TMP1:%.*]] = phi i32 [ [[TMP0]], [[ENTRY:%.*]] ], [ [[TMP4:%.*]], [[FOR_BODY:%.*]] ]
; CHECK-NEXT: [[TMP2:%.*]] = phi i32 [ undef, [[ENTRY]] ], [ [[TMP3:%.*]], [[FOR_BODY]] ]
; CHECK-NEXT: br i1 undef, label [[FOR_END:%.*]], label [[FOR_BODY]]
; CHECK: for.body:
; CHECK-NEXT: [[TMP3]] = add i32 [[TMP2]], -1
; CHECK-NEXT: [[SUB44_ELT:%.*]] = sub i32 0, [[TMP2]]
; CHECK-NEXT: [[TMP4]] = sdiv i32 [[TMP1]], [[SUB44_ELT]]
; CHECK-NEXT: br label [[FOR_COND]]
; CHECK: for.end:
; CHECK-NEXT: [[TOBOOL313:%.*]] = icmp eq i32 [[TMP1]], 0
; CHECK-NEXT: ret i1 [[TOBOOL313]]
;
entry:
br label %for.cond
for.cond:
%input_2.addr.0 = phi <3 x i32> [ %input_2, %entry ], [ %div45, %for.body ]
%input_1.addr.1 = phi <3 x i32> [ undef, %entry ], [ %dec43, %for.body ]
br i1 undef, label %for.end, label %for.body
for.body:
%dec43 = add <3 x i32> %input_1.addr.1, <i32 -1, i32 -1, i32 -1>
%sub44 = sub <3 x i32> <i32 -1, i32 -1, i32 -1>, %dec43
%div45 = sdiv <3 x i32> %input_2.addr.0, %sub44
br label %for.cond
for.end:
%0 = extractelement <3 x i32> %input_2.addr.0, i32 0
%.89 = select i1 false, i32 0, i32 %0
%tobool313 = icmp eq i32 %.89, 0
ret i1 %tobool313
}
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