e6ad9ef4e7
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
108 lines
4.7 KiB
LLVM
108 lines
4.7 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
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; RUN: opt -S -mtriple=s390x-unknown-linux -mcpu=z13 -loop-vectorize -dce \
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; RUN: -instcombine -force-vector-width=2 < %s | FileCheck %s
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;
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; Test that loop vectorizer does not generate vector addresses that must then
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; always be extracted.
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; Check that the addresses for a scalarized memory access is not extracted
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; from a vector register.
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define i32 @foo(i32* nocapture %A) {
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; CHECK-LABEL: @foo(
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; CHECK-NEXT: entry:
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; CHECK-NEXT: br i1 false, label [[SCALAR_PH:%.*]], label [[VECTOR_PH:%.*]]
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; CHECK: vector.ph:
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; CHECK-NEXT: br label [[VECTOR_BODY:%.*]]
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; CHECK: vector.body:
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; CHECK-NEXT: [[INDEX:%.*]] = phi i64 [ 0, [[VECTOR_PH]] ], [ [[INDEX_NEXT:%.*]], [[VECTOR_BODY]] ]
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; CHECK-NEXT: [[TMP0:%.*]] = shl nsw i64 [[INDEX]], 2
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; CHECK-NEXT: [[TMP1:%.*]] = shl i64 [[INDEX]], 2
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; CHECK-NEXT: [[TMP2:%.*]] = or i64 [[TMP1]], 4
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; CHECK-NEXT: [[TMP3:%.*]] = getelementptr inbounds i32, i32* [[A:%.*]], i64 [[TMP0]]
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; CHECK-NEXT: [[TMP4:%.*]] = getelementptr inbounds i32, i32* [[A]], i64 [[TMP2]]
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; CHECK-NEXT: store i32 4, i32* [[TMP3]], align 4
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; CHECK-NEXT: store i32 4, i32* [[TMP4]], align 4
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; CHECK-NEXT: [[INDEX_NEXT]] = add nuw i64 [[INDEX]], 2
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; CHECK-NEXT: [[TMP5:%.*]] = icmp eq i64 [[INDEX_NEXT]], 10000
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; CHECK-NEXT: br i1 [[TMP5]], label [[MIDDLE_BLOCK:%.*]], label [[VECTOR_BODY]], !llvm.loop [[LOOP0:![0-9]+]]
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; CHECK: middle.block:
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; CHECK-NEXT: br i1 true, label [[FOR_END:%.*]], label [[SCALAR_PH]]
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; CHECK: scalar.ph:
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; CHECK-NEXT: br label [[FOR_BODY:%.*]]
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; CHECK: for.body:
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; CHECK-NEXT: br i1 undef, label [[FOR_END]], label [[FOR_BODY]], !llvm.loop [[LOOP2:![0-9]+]]
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; CHECK: for.end:
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; CHECK-NEXT: ret i32 undef
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;
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entry:
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br label %for.body
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for.body:
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%indvars.iv = phi i64 [ 0, %entry ], [ %indvars.iv.next, %for.body ]
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%0 = shl nsw i64 %indvars.iv, 2
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%arrayidx = getelementptr inbounds i32, i32* %A, i64 %0
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store i32 4, i32* %arrayidx, align 4
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%indvars.iv.next = add i64 %indvars.iv, 1
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%lftr.wideiv = trunc i64 %indvars.iv.next to i32
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%exitcond = icmp eq i32 %lftr.wideiv, 10000
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br i1 %exitcond, label %for.end, label %for.body
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for.end:
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ret i32 undef
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}
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; Check that a load of address is scalarized.
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define i32 @foo1(i32* nocapture noalias %A, i32** nocapture %PtrPtr) {
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; CHECK-LABEL: @foo1(
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; CHECK-NEXT: entry:
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; CHECK-NEXT: br i1 false, label [[SCALAR_PH:%.*]], label [[VECTOR_PH:%.*]]
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; CHECK: vector.ph:
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; CHECK-NEXT: br label [[VECTOR_BODY:%.*]]
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; CHECK: vector.body:
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; CHECK-NEXT: [[INDEX:%.*]] = phi i64 [ 0, [[VECTOR_PH]] ], [ [[INDEX_NEXT:%.*]], [[VECTOR_BODY]] ]
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; CHECK-NEXT: [[TMP0:%.*]] = or i64 [[INDEX]], 1
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; CHECK-NEXT: [[TMP1:%.*]] = getelementptr inbounds i32*, i32** [[PTRPTR:%.*]], i64 [[INDEX]]
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; CHECK-NEXT: [[TMP2:%.*]] = getelementptr inbounds i32*, i32** [[PTRPTR]], i64 [[TMP0]]
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; CHECK-NEXT: [[TMP3:%.*]] = load i32*, i32** [[TMP1]], align 8
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; CHECK-NEXT: [[TMP4:%.*]] = load i32*, i32** [[TMP2]], align 8
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; CHECK-NEXT: [[TMP5:%.*]] = load i32, i32* [[TMP3]], align 4
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; CHECK-NEXT: [[TMP6:%.*]] = load i32, i32* [[TMP4]], align 4
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; CHECK-NEXT: [[TMP7:%.*]] = insertelement <2 x i32> poison, i32 [[TMP5]], i64 0
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; CHECK-NEXT: [[TMP8:%.*]] = insertelement <2 x i32> [[TMP7]], i32 [[TMP6]], i64 1
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; CHECK-NEXT: [[TMP9:%.*]] = getelementptr inbounds i32, i32* [[A:%.*]], i64 [[INDEX]]
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; CHECK-NEXT: [[TMP10:%.*]] = bitcast i32* [[TMP9]] to <2 x i32>*
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; CHECK-NEXT: store <2 x i32> [[TMP8]], <2 x i32>* [[TMP10]], align 4
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; CHECK-NEXT: [[INDEX_NEXT]] = add nuw i64 [[INDEX]], 2
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; CHECK-NEXT: [[TMP11:%.*]] = icmp eq i64 [[INDEX_NEXT]], 10000
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; CHECK-NEXT: br i1 [[TMP11]], label [[MIDDLE_BLOCK:%.*]], label [[VECTOR_BODY]], !llvm.loop [[LOOP4:![0-9]+]]
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; CHECK: middle.block:
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; CHECK-NEXT: br i1 true, label [[FOR_END:%.*]], label [[SCALAR_PH]]
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; CHECK: scalar.ph:
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; CHECK-NEXT: br label [[FOR_BODY:%.*]]
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; CHECK: for.body:
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; CHECK-NEXT: br i1 undef, label [[FOR_END]], label [[FOR_BODY]], !llvm.loop [[LOOP5:![0-9]+]]
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; CHECK: for.end:
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; CHECK-NEXT: ret i32 undef
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;
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entry:
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br label %for.body
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for.body:
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%indvars.iv = phi i64 [ 0, %entry ], [ %indvars.iv.next, %for.body ]
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%ptr = getelementptr inbounds i32*, i32** %PtrPtr, i64 %indvars.iv
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%el = load i32*, i32** %ptr
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%v = load i32, i32* %el
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%arrayidx = getelementptr inbounds i32, i32* %A, i64 %indvars.iv
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store i32 %v, i32* %arrayidx, align 4
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%indvars.iv.next = add i64 %indvars.iv, 1
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%lftr.wideiv = trunc i64 %indvars.iv.next to i32
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%exitcond = icmp eq i32 %lftr.wideiv, 10000
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br i1 %exitcond, label %for.end, label %for.body
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for.end:
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ret i32 undef
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}
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