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Do not push two return addresses on the stack when we call external functions who have their addresses taken. This fixes test-call.ll 

llvm-svn: 18134
This commit is contained in:
Chris Lattner 2004-11-22 22:25:30 +00:00
parent b769690ab3
commit a76f09d0d3
1 changed files with 16 additions and 10 deletions
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26
llvm/lib/Target/X86/X86JITInfo.cpp
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@ -18,16 +18,6 @@
#include "llvm/Config/alloca.h" #include "llvm/Config/alloca.h"
using namespace llvm; using namespace llvm;
void *X86JITInfo::emitFunctionStub(void *Fn, MachineCodeEmitter &MCE) {
MCE.startFunctionStub(6);
MCE.emitByte(0xE8); // Call with 32 bit pc-rel destination...
MCE.emitWord((intptr_t)Fn-MCE.getCurrentPCValue()-4);
MCE.emitByte(0xCD); // Interrupt - Just a marker identifying the stub!
return MCE.finishFunctionStub(0);
}
void X86JITInfo::replaceMachineCodeForFunction(void *Old, void *New) { void X86JITInfo::replaceMachineCodeForFunction(void *Old, void *New) {
unsigned char *OldByte = (unsigned char *)Old; unsigned char *OldByte = (unsigned char *)Old;
*OldByte++ = 0xE9; // Emit JMP opcode. *OldByte++ = 0xE9; // Emit JMP opcode.
@ -113,6 +103,22 @@ X86JITInfo::getLazyResolverFunction(JITCompilerFn F) {
return CompilationCallback; return CompilationCallback;
} }
void *X86JITInfo::emitFunctionStub(void *Fn, MachineCodeEmitter &MCE) {
if (Fn != CompilationCallback) {
MCE.startFunctionStub(5);
MCE.emitByte(0xE9);
MCE.emitWord((intptr_t)Fn-MCE.getCurrentPCValue()-4);
return MCE.finishFunctionStub(0);
}
MCE.startFunctionStub(6);
MCE.emitByte(0xE8); // Call with 32 bit pc-rel destination...
MCE.emitWord((intptr_t)Fn-MCE.getCurrentPCValue()-4);
MCE.emitByte(0xCD); // Interrupt - Just a marker identifying the stub!
return MCE.finishFunctionStub(0);
}
/// relocate - Before the JIT can run a block of code that has been emitted, /// relocate - Before the JIT can run a block of code that has been emitted,
/// it must rewrite the code to contain the actual addresses of any /// it must rewrite the code to contain the actual addresses of any