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Add statistic for # machine instrs emitted

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Add GROSS HACK to get CompilationCallback to work when compiled in release mode


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@6646 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner 2003-06-06 04:00:05 +00:00
parent 3339459e48
commit 302de59001
1 changed files with 13 additions and 1 deletions
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14
lib/Target/X86/X86CodeEmitter.cpp
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@ -12,8 +12,12 @@
#include "llvm/CodeGen/MachineFunctionPass.h"
#include "llvm/CodeGen/MachineInstr.h"
#include "llvm/Value.h"
#include "Support/Statistic.h"
namespace {
Statistic<>
NumEmitted("x86-emitter", "Number of machine instructions emitted");
class JITResolver {
MachineCodeEmitter &MCE;
@ -71,11 +75,17 @@ unsigned JITResolver::getLazyResolver(Function *F) {
void JITResolver::CompilationCallback() {
unsigned *StackPtr = (unsigned*)__builtin_frame_address(0);
unsigned RetAddr = (unsigned)(intptr_t)__builtin_return_address(0);
assert(StackPtr[1] == RetAddr &&
"Could not find return address on the stack!");
bool isStub = ((unsigned char*)RetAddr)[0] == 0xCD; // Interrupt marker?
// FIXME FIXME FIXME FIXME: __builtin_frame_address doesn't work if frame
// pointer elimination has been performed. Having a variable sized alloca
// disables frame pointer elimination currently, even if it's dead. This is a
// gross hack.
alloca(10+isStub);
// FIXME FIXME FIXME FIXME
// The call instruction should have pushed the return value onto the stack...
RetAddr -= 4; // Backtrack to the reference itself...
@ -429,6 +439,8 @@ static unsigned sizeOfPtr(const TargetInstrDescriptor &Desc) {
}
void Emitter::emitInstruction(MachineInstr &MI) {
NumEmitted++; // Keep track of the # of mi's emitted
unsigned Opcode = MI.getOpcode();
const TargetInstrDescriptor &Desc = II->get(Opcode);