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c2297544c0
LLVM should be smarter about *known* malloc's alignment and this knowledge may enable other optimizations. Originally started as LLVM patch - https://reviews.llvm.org/D100862 but this logic should be really in Clang. Reviewed By: rjmccall Differential Revision: https://reviews.llvm.org/D100879
36 lines
1.4 KiB
C
36 lines
1.4 KiB
C
// RUN: %clang_cc1 -triple x86_64-unknown-linux-gnu -emit-llvm < %s | FileCheck %s --check-prefix=ALIGN16
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// RUN: %clang_cc1 -triple x86_64-windows-msvc -emit-llvm < %s | FileCheck %s --check-prefix=ALIGN16
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// RUN: %clang_cc1 -triple i386-apple-darwin -emit-llvm < %s | FileCheck %s --check-prefix=ALIGN16
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// RUN: %clang_cc1 -triple i386-unknown-linux-gnu -emit-llvm < %s | FileCheck %s --check-prefix=ALIGN8
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// RUN: %clang_cc1 -triple x86_64-unknown-linux-gnu -fno-builtin-malloc -emit-llvm < %s | FileCheck %s --check-prefix=NOBUILTIN-MALLOC
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// RUN: %clang_cc1 -triple x86_64-unknown-linux-gnu -fno-builtin-calloc -emit-llvm < %s | FileCheck %s --check-prefix=NOBUILTIN-CALLOC
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// RUN: %clang_cc1 -triple x86_64-unknown-linux-gnu -fno-builtin-realloc -emit-llvm < %s | FileCheck %s --check-prefix=NOBUILTIN-REALLOC
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typedef __SIZE_TYPE__ size_t;
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void *malloc(size_t);
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void *calloc(size_t, size_t);
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void *realloc(void *, size_t);
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void *malloc_test(size_t n) {
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return malloc(n);
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}
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void *calloc_test(size_t n) {
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return calloc(1, n);
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}
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void *raalloc_test(void *p, size_t n) {
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return realloc(p, n);
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}
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// ALIGN16: align 16 i8* @malloc
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// ALIGN16: align 16 i8* @calloc
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// ALIGN16: align 16 i8* @realloc
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// ALIGN8: align 8 i8* @malloc
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// ALIGN8: align 8 i8* @calloc
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// ALIGN8: align 8 i8* @realloc
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// NOBUILTIN-MALLOC: declare i8* @malloc
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// NOBUILTIN-CALLOC: declare i8* @calloc
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// NOBUILTIN-REALLOC: declare i8* @realloc
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