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refactor intrinsic handling code out into its own method.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@47823 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner 2008-03-02 08:29:41 +00:00
parent d9a706ecf9
commit 2299fec22c
1 changed files with 115 additions and 108 deletions
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223
lib/Target/CBackend/CBackend.cpp
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@ -271,6 +271,7 @@ namespace {
void visitSelectInst(SelectInst &I);
void visitCallInst (CallInst &I);
void visitInlineAsm(CallInst &I);
bool visitBuiltinCall(CallInst &I, Intrinsic::ID ID, bool &WroteCallee);
void visitMallocInst(MallocInst &I);
void visitAllocaInst(AllocaInst &I);
@ -2554,7 +2555,6 @@ void CWriter::lowerIntrinsics(Function &F) {
}
}
void CWriter::visitCallInst(CallInst &I) {
//check if we have inline asm
if (isInlineAsm(I)) {
@ -2566,114 +2566,9 @@ void CWriter::visitCallInst(CallInst &I) {
// Handle intrinsic function calls first...
if (Function *F = I.getCalledFunction())
if (Intrinsic::ID ID = (Intrinsic::ID)F->getIntrinsicID()) {
switch (ID) {
default: {
// If this is an intrinsic that directly corresponds to a GCC
// builtin, we emit it here.
const char *BuiltinName = "";
#define GET_GCC_BUILTIN_NAME
#include "llvm/Intrinsics.gen"
#undef GET_GCC_BUILTIN_NAME
assert(BuiltinName[0] && "Unknown LLVM intrinsic!");
Out << BuiltinName;
WroteCallee = true;
break;
}
case Intrinsic::memory_barrier:
Out << "0; __sync_syncronize()";
if (Intrinsic::ID ID = (Intrinsic::ID)F->getIntrinsicID())
if (visitBuiltinCall(I, ID, WroteCallee))
return;
case Intrinsic::vastart:
Out << "0; ";
Out << "va_start(*(va_list*)";
writeOperand(I.getOperand(1));
Out << ", ";
// Output the last argument to the enclosing function...
if (I.getParent()->getParent()->arg_empty()) {
cerr << "The C backend does not currently support zero "
<< "argument varargs functions, such as '"
<< I.getParent()->getParent()->getName() << "'!\n";
abort();
}
writeOperand(--I.getParent()->getParent()->arg_end());
Out << ')';
return;
case Intrinsic::vaend:
if (!isa<ConstantPointerNull>(I.getOperand(1))) {
Out << "0; va_end(*(va_list*)";
writeOperand(I.getOperand(1));
Out << ')';
} else {
Out << "va_end(*(va_list*)0)";
}
return;
case Intrinsic::vacopy:
Out << "0; ";
Out << "va_copy(*(va_list*)";
writeOperand(I.getOperand(1));
Out << ", *(va_list*)";
writeOperand(I.getOperand(2));
Out << ')';
return;
case Intrinsic::returnaddress:
Out << "__builtin_return_address(";
writeOperand(I.getOperand(1));
Out << ')';
return;
case Intrinsic::frameaddress:
Out << "__builtin_frame_address(";
writeOperand(I.getOperand(1));
Out << ')';
return;
case Intrinsic::powi:
Out << "__builtin_powi(";
writeOperand(I.getOperand(1));
Out << ", ";
writeOperand(I.getOperand(2));
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;
case Intrinsic::prefetch:
Out << "LLVM_PREFETCH((const void *)";
writeOperand(I.getOperand(1));
Out << ", ";
writeOperand(I.getOperand(2));
Out << ", ";
writeOperand(I.getOperand(3));
Out << ")";
return;
case Intrinsic::stacksave:
// Emit this as: Val = 0; *((void**)&Val) = __builtin_stack_save()
// to work around GCC bugs (see PR1809).
Out << "0; *((void**)&" << GetValueName(&I)
<< ") = __builtin_stack_save()";
return;
case Intrinsic::dbg_stoppoint: {
// If we use writeOperand directly we get a "u" suffix which is rejected
// by gcc.
DbgStopPointInst &SPI = cast<DbgStopPointInst>(I);
Out << "\n#line "
<< SPI.getLine()
<< " \"" << SPI.getDirectory()
<< SPI.getFileName() << "\"\n";
return;
}
}
}
Value *Callee = I.getCalledValue();
@ -2763,6 +2658,118 @@ void CWriter::visitCallInst(CallInst &I) {
Out << ')';
}
/// visitBuiltinCall - Handle the call to the specified builtin. Returns true
/// if the entire call is handled, return false it it wasn't handled, and
/// optionally set 'WroteCallee' if the callee has already been printed out.
bool CWriter::visitBuiltinCall(CallInst &I, Intrinsic::ID ID,
bool &WroteCallee) {
switch (ID) {
default: {
// If this is an intrinsic that directly corresponds to a GCC
// builtin, we emit it here.
const char *BuiltinName = "";
Function *F = I.getCalledFunction();
#define GET_GCC_BUILTIN_NAME
#include "llvm/Intrinsics.gen"
#undef GET_GCC_BUILTIN_NAME
assert(BuiltinName[0] && "Unknown LLVM intrinsic!");
Out << BuiltinName;
WroteCallee = true;
return false;
}
case Intrinsic::memory_barrier:
Out << "__sync_syncronize()";
return true;
case Intrinsic::vastart:
Out << "0; ";
Out << "va_start(*(va_list*)";
writeOperand(I.getOperand(1));
Out << ", ";
// Output the last argument to the enclosing function.
if (I.getParent()->getParent()->arg_empty()) {
cerr << "The C backend does not currently support zero "
<< "argument varargs functions, such as '"
<< I.getParent()->getParent()->getName() << "'!\n";
abort();
}
writeOperand(--I.getParent()->getParent()->arg_end());
Out << ')';
return true;
case Intrinsic::vaend:
if (!isa<ConstantPointerNull>(I.getOperand(1))) {
Out << "0; va_end(*(va_list*)";
writeOperand(I.getOperand(1));
Out << ')';
} else {
Out << "va_end(*(va_list*)0)";
}
return true;
case Intrinsic::vacopy:
Out << "0; ";
Out << "va_copy(*(va_list*)";
writeOperand(I.getOperand(1));
Out << ", *(va_list*)";
writeOperand(I.getOperand(2));
Out << ')';
return true;
case Intrinsic::returnaddress:
Out << "__builtin_return_address(";
writeOperand(I.getOperand(1));
Out << ')';
return true;
case Intrinsic::frameaddress:
Out << "__builtin_frame_address(";
writeOperand(I.getOperand(1));
Out << ')';
return true;
case Intrinsic::powi:
Out << "__builtin_powi(";
writeOperand(I.getOperand(1));
Out << ", ";
writeOperand(I.getOperand(2));
Out << ')';
return true;
case Intrinsic::setjmp:
Out << "setjmp(*(jmp_buf*)";
writeOperand(I.getOperand(1));
Out << ')';
return true;
case Intrinsic::longjmp:
Out << "longjmp(*(jmp_buf*)";
writeOperand(I.getOperand(1));
Out << ", ";
writeOperand(I.getOperand(2));
Out << ')';
return true;
case Intrinsic::prefetch:
Out << "LLVM_PREFETCH((const void *)";
writeOperand(I.getOperand(1));
Out << ", ";
writeOperand(I.getOperand(2));
Out << ", ";
writeOperand(I.getOperand(3));
Out << ")";
return true;
case Intrinsic::stacksave:
// Emit this as: Val = 0; *((void**)&Val) = __builtin_stack_save()
// to work around GCC bugs (see PR1809).
Out << "0; *((void**)&" << GetValueName(&I)
<< ") = __builtin_stack_save()";
return true;
case Intrinsic::dbg_stoppoint: {
// If we use writeOperand directly we get a "u" suffix which is rejected
// by gcc.
DbgStopPointInst &SPI = cast<DbgStopPointInst>(I);
Out << "\n#line "
<< SPI.getLine()
<< " \"" << SPI.getDirectory()
<< SPI.getFileName() << "\"\n";
return true;
}
}
}
//This converts the llvm constraint string to something gcc is expecting.
//TODO: work out platform independent constraints and factor those out