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Optimizing to calloc() to malloc() + memset() can be bad on some platforms.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@26732 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Evan Cheng 2006-03-13 21:22:43 +00:00
parent ac0f8f2929
commit 7abddda6cc
1 changed files with 0 additions and 33 deletions
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33
runtime/GCCLibraries/libc/memory.c
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@ -1,33 +0,0 @@
//===-- memory.c - String functions for the LLVM libc Library ----*- C -*-===//
//
// A lot of this code is ripped gratuitously from glibc and libiberty.
//
//===---------------------------------------------------------------------===//
#include <stdlib.h>
// If we're not being compiled with GCC, turn off attributes. Question is how
// to handle overriding of memory allocation functions in that case.
#ifndef __GNUC__
#define __attribute__(X)
#endif
// For now, turn off the weak linkage attribute on Mac OS X.
#if defined(__GNUC__) && defined(__APPLE_CC__)
#define __ATTRIBUTE_WEAK__
#elif defined(__GNUC__)
#define __ATTRIBUTE_WEAK__ __attribute__((weak))
#else
#define __ATTRIBUTE_WEAK__
#endif
void *malloc(size_t) __ATTRIBUTE_WEAK__;
void free(void *) __ATTRIBUTE_WEAK__;
void *memset(void *, int, size_t) __ATTRIBUTE_WEAK__;
void *calloc(size_t nelem, size_t elsize) __ATTRIBUTE_WEAK__;
void *calloc(size_t nelem, size_t elsize) {
void *Result = malloc(nelem*elsize);
if (Result) memset(Result, 0, nelem*elsize);
return Result;
}