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Implement support for the unwind intrinsic in the CBE

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@8116 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner 2003-08-24 13:06:10 +00:00
parent 93ee3f66ad
commit e55497cd04
2 changed files with 26 additions and 0 deletions
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13
lib/Target/CBackend/CBackend.cpp
View File

@ -1137,6 +1137,19 @@ void CWriter::visitCallInst(CallInst &I) {
writeOperand(I.getOperand(2));
Out << ")";
return;
case LLVMIntrinsic::unwind:
// The unwind intrinsic calls a control flow transfer out of the current
// function, unwinding the stack until a caller who used the invoke
// instruction is found. In this context, we code generated the invoke
// instruction to add an entry to the top of the jmpbuf_list. Thus,
// here we just have to longjmp to the specified handler.
Out << "if (__llvm_jmpbuf_list == 0) { /* llvm.unwind */\n"
<< " printf(\"throw found with no handler!\\n\"); abort();\n"
<< " }\n"
<< " longjmp(__llvm_jmpbuf_list->buf, 1)";
return;
case LLVMIntrinsic::setjmp:
case LLVMIntrinsic::sigsetjmp:

13
lib/Target/CBackend/Writer.cpp
View File

@ -1137,6 +1137,19 @@ void CWriter::visitCallInst(CallInst &I) {
writeOperand(I.getOperand(2));
Out << ")";
return;
case LLVMIntrinsic::unwind:
// The unwind intrinsic calls a control flow transfer out of the current
// function, unwinding the stack until a caller who used the invoke
// instruction is found. In this context, we code generated the invoke
// instruction to add an entry to the top of the jmpbuf_list. Thus,
// here we just have to longjmp to the specified handler.
Out << "if (__llvm_jmpbuf_list == 0) { /* llvm.unwind */\n"
<< " printf(\"throw found with no handler!\\n\"); abort();\n"
<< " }\n"
<< " longjmp(__llvm_jmpbuf_list->buf, 1)";
return;
case LLVMIntrinsic::setjmp:
case LLVMIntrinsic::sigsetjmp: