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
56 lines
2.3 KiB
LLVM
56 lines
2.3 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --version 2
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; RUN: opt < %s -passes=infer-alignment -S | FileCheck %s
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define void @non_pow2_size(i177 %X) {
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; CHECK-LABEL: define void @non_pow2_size
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; CHECK-SAME: (i177 [[X:%.*]]) {
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; CHECK-NEXT: [[A:%.*]] = alloca i177, align 8
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; CHECK-NEXT: [[L1:%.*]] = load i177, ptr [[A]], align 8
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; CHECK-NEXT: store i177 [[X]], ptr [[A]], align 8
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; CHECK-NEXT: ret void
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;
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%A = alloca i177, align 1
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%L1 = load i177, ptr %A, align 1
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store i177 %X, ptr %A, align 1
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ret void
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}
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; TODO: For non-byte-sized vectors, current implementation assumes there is
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; padding to the next byte boundary between elements.
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@vector_i4 = constant [16 x <2 x i4>] zeroinitializer, align 8
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define void @load_vector_i4(i4 %X) {
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; CHECK-LABEL: define void @load_vector_i4
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; CHECK-SAME: (i4 [[X:%.*]]) {
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; CHECK-NEXT: [[PTR_0:%.*]] = getelementptr [16 x <2 x i4>], ptr @vector_i4, i64 0, i64 1
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; CHECK-NEXT: [[PTR_1:%.*]] = getelementptr [16 x <2 x i4>], ptr @vector_i4, i64 0, i64 2
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; CHECK-NEXT: [[PTR_2:%.*]] = getelementptr [16 x <2 x i4>], ptr @vector_i4, i64 0, i64 4
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; CHECK-NEXT: [[PTR_3:%.*]] = getelementptr [16 x <2 x i4>], ptr @vector_i4, i64 0, i64 8
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; CHECK-NEXT: [[RES_0:%.*]] = load i4, ptr [[PTR_0]], align 1
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; CHECK-NEXT: [[RES_1:%.*]] = load i4, ptr [[PTR_1]], align 2
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; CHECK-NEXT: [[RES_2:%.*]] = load i4, ptr [[PTR_2]], align 4
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; CHECK-NEXT: [[RES_3:%.*]] = load i4, ptr [[PTR_3]], align 8
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; CHECK-NEXT: store i4 [[X]], ptr [[PTR_0]], align 1
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; CHECK-NEXT: store i4 [[X]], ptr [[PTR_1]], align 2
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; CHECK-NEXT: store i4 [[X]], ptr [[PTR_2]], align 4
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; CHECK-NEXT: store i4 [[X]], ptr [[PTR_3]], align 8
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; CHECK-NEXT: ret void
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;
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%ptr.0 = getelementptr [16 x <2 x i4>], ptr @vector_i4, i64 0, i64 1
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%ptr.1 = getelementptr [16 x <2 x i4>], ptr @vector_i4, i64 0, i64 2
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%ptr.2 = getelementptr [16 x <2 x i4>], ptr @vector_i4, i64 0, i64 4
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%ptr.3 = getelementptr [16 x <2 x i4>], ptr @vector_i4, i64 0, i64 8
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%res.0 = load i4, ptr %ptr.0, align 1
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%res.1 = load i4, ptr %ptr.1, align 1
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%res.2 = load i4, ptr %ptr.2, align 1
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%res.3 = load i4, ptr %ptr.3, align 1
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store i4 %X, ptr %ptr.0, align 1
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store i4 %X, ptr %ptr.1, align 1
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store i4 %X, ptr %ptr.2, align 1
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store i4 %X, ptr %ptr.3, align 1
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ret void
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}
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