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Now that the lowerinvoke pass inserts calls to llvm.setjmp/llvm.longjmp, some

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hacks can be banished.  Also, this gives us the opportunity to emit special code
for the setjmp/longjmps which alows the elimination of one GCC warning for every
setjmp/longjmp site (which is often THOUSANDS in C++ programs).  Yaay!


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@11484 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner 2004-02-15 22:51:47 +00:00
parent 9b700f7951
commit e42cde2a14
2 changed files with 30 additions and 4 deletions
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17
lib/Target/CBackend/CBackend.cpp
View File

@ -686,8 +686,7 @@ bool CWriter::doInitialization(Module &M) {
Out << "\n/* Function Declarations */\n";
for (Module::iterator I = M.begin(), E = M.end(); I != E; ++I) {
// Don't print declarations for intrinsic functions.
if (!I->getIntrinsicID() &&
I->getName() != "setjmp" && I->getName() != "longjmp") {
if (!I->getIntrinsicID()) {
printFunctionSignature(I, true);
if (I->hasWeakLinkage()) Out << " __ATTRIBUTE_WEAK__";
Out << ";\n";
@ -1187,6 +1186,8 @@ void CWriter::lowerIntrinsics(Module &M) {
case Intrinsic::va_end:
case Intrinsic::returnaddress:
case Intrinsic::frameaddress:
case Intrinsic::setjmp:
case Intrinsic::longjmp:
// We directly implement these intrinsics
break;
default:
@ -1245,6 +1246,18 @@ void CWriter::visitCallInst(CallInst &I) {
writeOperand(I.getOperand(1));
Out << ")";
return;
case Intrinsic::setjmp:
Out << "setjmp(*(jmp_buf*)";
writeOperand(I.getOperand(1));
Out << ")";
return;
case Intrinsic::longjmp:
Out << "longjmp(*(jmp_buf*)";
writeOperand(I.getOperand(1));
Out << ", ";
writeOperand(I.getOperand(2));
Out << ")";
return;
}
}
visitCallSite(&I);

17
lib/Target/CBackend/Writer.cpp
View File

@ -686,8 +686,7 @@ bool CWriter::doInitialization(Module &M) {
Out << "\n/* Function Declarations */\n";
for (Module::iterator I = M.begin(), E = M.end(); I != E; ++I) {
// Don't print declarations for intrinsic functions.
if (!I->getIntrinsicID() &&
I->getName() != "setjmp" && I->getName() != "longjmp") {
if (!I->getIntrinsicID()) {
printFunctionSignature(I, true);
if (I->hasWeakLinkage()) Out << " __ATTRIBUTE_WEAK__";
Out << ";\n";
@ -1187,6 +1186,8 @@ void CWriter::lowerIntrinsics(Module &M) {
case Intrinsic::va_end:
case Intrinsic::returnaddress:
case Intrinsic::frameaddress:
case Intrinsic::setjmp:
case Intrinsic::longjmp:
// We directly implement these intrinsics
break;
default:
@ -1245,6 +1246,18 @@ void CWriter::visitCallInst(CallInst &I) {
writeOperand(I.getOperand(1));
Out << ")";
return;
case Intrinsic::setjmp:
Out << "setjmp(*(jmp_buf*)";
writeOperand(I.getOperand(1));
Out << ")";
return;
case Intrinsic::longjmp:
Out << "longjmp(*(jmp_buf*)";
writeOperand(I.getOperand(1));
Out << ", ";
writeOperand(I.getOperand(2));
Out << ")";
return;
}
}
visitCallSite(&I);