0f152a55d3
This pass aims to infer alignment for instructions as a separate pass, to reduce redundant work done by InstCombine running multiple times. It runs late in the pipeline, just before the back-end passes where this information is most useful. Differential Revision: https://reviews.llvm.org/D158529
37 lines
1.3 KiB
LLVM
37 lines
1.3 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --version 2
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; RUN: opt -passes=infer-alignment -S < %s | FileCheck %s
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; <4 x i32> -> 16 byte alignment
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define void @alignment_sustain(ptr align 16 %ptr) {
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; CHECK-LABEL: define void @alignment_sustain
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; CHECK-SAME: (ptr align 16 [[PTR:%.*]]) {
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; CHECK-NEXT: [[GEP:%.*]] = getelementptr <vscale x 4 x i32>, ptr [[PTR]], i32 3
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; CHECK-NEXT: [[LOAD:%.*]] = load <4 x i32>, ptr [[GEP]], align 16
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; CHECK-NEXT: store <4 x i32> zeroinitializer, ptr [[GEP]], align 16
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; CHECK-NEXT: ret void
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;
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%gep = getelementptr <vscale x 4 x i32>, ptr %ptr, i32 3
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%load = load <4 x i32>, ptr %gep, align 16
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store <4 x i32> zeroinitializer, ptr %gep, align 16
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ret void
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}
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; <8 x i32> -> 32 byte alignment
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define void @alignment_increase(ptr align 32 %ptr) {
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; CHECK-LABEL: define void @alignment_increase
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; CHECK-SAME: (ptr align 32 [[PTR:%.*]]) {
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; CHECK-NEXT: [[GEP:%.*]] = getelementptr <vscale x 8 x i32>, ptr [[PTR]], i32 3
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; CHECK-NEXT: [[LOAD:%.*]] = load <8 x i32>, ptr [[GEP]], align 32
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; CHECK-NEXT: store <8 x i32> zeroinitializer, ptr [[GEP]], align 32
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; CHECK-NEXT: ret void
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;
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%gep = getelementptr <vscale x 8 x i32>, ptr %ptr, i32 3
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%load = load <8 x i32>, ptr %gep, align 16
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store <8 x i32> zeroinitializer, ptr %gep, align 16
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ret void
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}
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