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Mark function used by asm block as used, otherwise optimizer may not see the use and may delete the function.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@53692 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Devang Patel 2008-07-16 17:54:34 +00:00
parent 5d0af038a7
commit 0d885d1661
2 changed files with 8 additions and 1 deletions
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5
include/llvm/Support/Compiler.h
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@ -23,6 +23,11 @@
#define VISIBILITY_HIDDEN
#endif
#if (__GNUC__ >= 4)
#define ATTRIBUTE_USED __attribute__((__used__))
#else
#define ATTRIBUTE_USED
#endif
// C++ doesn't support 'extern template' of template specializations. GCC does,
// but requires __extension__ before it. In the header, use this:

4
lib/Target/X86/X86JITInfo.cpp
View File

@ -18,6 +18,7 @@
#include "llvm/Function.h"
#include "llvm/CodeGen/MachineCodeEmitter.h"
#include "llvm/Config/alloca.h"
#include "llvm/Support/Compiler.h"
#include <cstdlib>
#include <cstring>
using namespace llvm;
@ -315,7 +316,8 @@ extern "C" {
/// function stub when we did not know the real target of a call. This function
/// must locate the start of the stub or call site and pass it into the JIT
/// compiler function.
extern "C" void X86CompilationCallback2(intptr_t *StackPtr, intptr_t RetAddr) {
extern "C" void ATTRIBUTE_USED
X86CompilationCallback2(intptr_t *StackPtr, intptr_t RetAddr) {
intptr_t *RetAddrLoc = &StackPtr[1];
assert(*RetAddrLoc == RetAddr &&
"Could not find return address on the stack!");