352a836176
This is a small canonicalization for `gep i32, p, (mul x, C)` -> `gep i8, p, (mul x, C*4)`, so that the mul can combine both of the constant multiplications, and we take a small step towards canonicalizing more geps to i8. It currently doesn't attempt to check for multiple uses on the mul, but that should be possible if it sounds better. Let me know what you think of the idea in general.
106 lines
4.6 KiB
LLVM
106 lines
4.6 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 -passes=loop-vectorize,dce,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(ptr 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 i64 [[INDEX]], 2
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; CHECK-NEXT: [[TMP1:%.*]] = or disjoint i64 [[TMP0]], 4
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; CHECK-NEXT: [[DOTIDX:%.*]] = shl nsw i64 [[INDEX]], 4
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; CHECK-NEXT: [[TMP2:%.*]] = getelementptr inbounds i8, ptr [[A:%.*]], i64 [[DOTIDX]]
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; CHECK-NEXT: [[TMP3:%.*]] = getelementptr inbounds i32, ptr [[A]], i64 [[TMP1]]
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; CHECK-NEXT: store i32 4, ptr [[TMP2]], align 4
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; CHECK-NEXT: store i32 4, ptr [[TMP3]], align 4
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; CHECK-NEXT: [[INDEX_NEXT]] = add nuw i64 [[INDEX]], 2
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; CHECK-NEXT: [[TMP4:%.*]] = icmp eq i64 [[INDEX_NEXT]], 10000
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; CHECK-NEXT: br i1 [[TMP4]], 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 poison, label [[FOR_END]], label [[FOR_BODY]], !llvm.loop [[LOOP3:![0-9]+]]
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; CHECK: for.end:
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; CHECK-NEXT: ret i32 poison
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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, ptr %A, i64 %0
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store i32 4, ptr %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 poison
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}
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; Check that a load of address is scalarized.
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define i32 @foo1(ptr nocapture noalias %A, ptr 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 disjoint i64 [[INDEX]], 1
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; CHECK-NEXT: [[TMP1:%.*]] = getelementptr inbounds ptr, ptr [[PTRPTR:%.*]], i64 [[INDEX]]
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; CHECK-NEXT: [[TMP2:%.*]] = getelementptr inbounds ptr, ptr [[PTRPTR]], i64 [[TMP0]]
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; CHECK-NEXT: [[TMP3:%.*]] = load ptr, ptr [[TMP1]], align 8
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; CHECK-NEXT: [[TMP4:%.*]] = load ptr, ptr [[TMP2]], align 8
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; CHECK-NEXT: [[TMP5:%.*]] = load i32, ptr [[TMP3]], align 4
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; CHECK-NEXT: [[TMP6:%.*]] = load i32, ptr [[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, ptr [[A:%.*]], i64 [[INDEX]]
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; CHECK-NEXT: store <2 x i32> [[TMP8]], ptr [[TMP9]], align 4
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; CHECK-NEXT: [[INDEX_NEXT]] = add nuw i64 [[INDEX]], 2
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; CHECK-NEXT: [[TMP10:%.*]] = icmp eq i64 [[INDEX_NEXT]], 10000
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; CHECK-NEXT: br i1 [[TMP10]], 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 poison, 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 poison
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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 ptr, ptr %PtrPtr, i64 %indvars.iv
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%el = load ptr, ptr %ptr
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%v = load i32, ptr %el
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%arrayidx = getelementptr inbounds i32, ptr %A, i64 %indvars.iv
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store i32 %v, ptr %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 poison
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}
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