1b1c8d83d3
Turning on `enable_noundef_analysis` flag allows better codegen by removing freeze instructions. I modified clang by renaming `enable_noundef_analysis` flag to `disable-noundef-analysis` and turning it off by default. Test updates are made as a separate patch: D108453 Reviewed By: eugenis Differential Revision: https://reviews.llvm.org/D105169
58 lines
2.8 KiB
C++
58 lines
2.8 KiB
C++
// RUN: %clang_cc1 -x c++ %s -O0 -triple=x86_64-apple-darwin -target-feature +avx2 -fmax-type-align=16 -emit-llvm -o - -Werror | FileCheck %s
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// rdar://16254558
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typedef float AVX2Float __attribute__((__vector_size__(32)));
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volatile float TestAlign(void)
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{
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volatile AVX2Float *p = new AVX2Float;
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*p = *p;
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AVX2Float r = *p;
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return r[0];
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}
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// CHECK: [[R:%.*]] = alloca <8 x float>, align 32
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// CHECK-NEXT: [[CALL:%.*]] = call noalias noundef nonnull i8* @_Znwm(i64 noundef 32)
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// CHECK-NEXT: [[ZERO:%.*]] = bitcast i8* [[CALL]] to <8 x float>*
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// CHECK-NEXT: store <8 x float>* [[ZERO]], <8 x float>** [[P:%.*]], align 8
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// CHECK-NEXT: [[ONE:%.*]] = load <8 x float>*, <8 x float>** [[P]], align 8
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// CHECK-NEXT: [[TWO:%.*]] = load volatile <8 x float>, <8 x float>* [[ONE]], align 16
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// CHECK-NEXT: [[THREE:%.*]] = load <8 x float>*, <8 x float>** [[P]], align 8
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// CHECK-NEXT: store volatile <8 x float> [[TWO]], <8 x float>* [[THREE]], align 16
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// CHECK-NEXT: [[FOUR:%.*]] = load <8 x float>*, <8 x float>** [[P]], align 8
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// CHECK-NEXT: [[FIVE:%.*]] = load volatile <8 x float>, <8 x float>* [[FOUR]], align 16
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// CHECK-NEXT: store <8 x float> [[FIVE]], <8 x float>* [[R]], align 32
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// CHECK-NEXT: [[SIX:%.*]] = load <8 x float>, <8 x float>* [[R]], align 32
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// CHECK-NEXT: [[VECEXT:%.*]] = extractelement <8 x float> [[SIX]], i32 0
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// CHECK-NEXT: ret float [[VECEXT]]
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typedef float AVX2Float_Explicitly_aligned __attribute__((__vector_size__(32))) __attribute__((aligned (32)));
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typedef AVX2Float_Explicitly_aligned AVX2Float_indirect;
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typedef AVX2Float_indirect AVX2Float_use_existing_align;
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volatile float TestAlign2(void)
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{
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volatile AVX2Float_use_existing_align *p = new AVX2Float_use_existing_align;
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*p = *p;
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AVX2Float_use_existing_align r = *p;
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return r[0];
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}
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// CHECK: [[R:%.*]] = alloca <8 x float>, align 32
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// CHECK-NEXT: [[CALL:%.*]] = call noalias noundef nonnull i8* @_Znwm(i64 noundef 32)
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// CHECK-NEXT: [[ZERO:%.*]] = bitcast i8* [[CALL]] to <8 x float>*
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// CHECK-NEXT: store <8 x float>* [[ZERO]], <8 x float>** [[P:%.*]], align 8
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// CHECK-NEXT: [[ONE:%.*]] = load <8 x float>*, <8 x float>** [[P]], align 8
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// CHECK-NEXT: [[TWO:%.*]] = load volatile <8 x float>, <8 x float>* [[ONE]], align 32
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// CHECK-NEXT: [[THREE:%.*]] = load <8 x float>*, <8 x float>** [[P]], align 8
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// CHECK-NEXT: store volatile <8 x float> [[TWO]], <8 x float>* [[THREE]], align 32
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// CHECK-NEXT: [[FOUR:%.*]] = load <8 x float>*, <8 x float>** [[P]], align 8
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// CHECK-NEXT: [[FIVE:%.*]] = load volatile <8 x float>, <8 x float>* [[FOUR]], align 32
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// CHECK-NEXT: store <8 x float> [[FIVE]], <8 x float>* [[R]], align 32
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// CHECK-NEXT: [[SIX:%.*]] = load <8 x float>, <8 x float>* [[R]], align 32
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// CHECK-NEXT: [[VECEXT:%.*]] = extractelement <8 x float> [[SIX]], i32 0
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// CHECK-NEXT: ret float [[VECEXT]]
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