replica
/
hanchenye-llvm-project
2
0
Fork 0
Code Issues Pull Requests Projects Releases Wiki Activity

clean up the CBE output a bit 

llvm-svn: 21740
This commit is contained in:
Chris Lattner 2005-05-06 06:58:42 +00:00
parent 561b7eb9e1
commit 18335f8925
1 changed files with 15 additions and 13 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

28
llvm/lib/Target/CBackend/Writer.cpp
View File

@ -215,7 +215,6 @@ namespace {
unsigned Indent);
void printIndexingExpression(Value *Ptr, gep_type_iterator I,
gep_type_iterator E);
void printCodeForMain();
};
}
@ -815,8 +814,20 @@ static void generateCompilerSpecificCode(std::ostream& Out) {
<< "#define LLVM_NANSF(NanStr) 0.0F /* Float */\n"
<< "#define LLVM_INF ((double)0.0) /* Double */\n"
<< "#define LLVM_INFF 0.0F /* Float */\n"
<< "#define LLVM_PREFETCH(addr,rw,locality) \n"
<< "#endif\n";
<< "#define LLVM_PREFETCH(addr,rw,locality) /* PREFETCH */\n"
<< "#endif\n\n";
// Output target-specific code that should be inserted into main.
Out << "#define CODE_FOR_MAIN() /* Any target-specific code for main()*/\n";
// On X86, set the FP control word to 64-bits of precision instead of 80 bits.
Out << "#if defined(__GNUC__) && !defined(__llvm__)\n"
<< "#if defined(i386) || defined(__i386__) || defined(__i386)\n"
<< "#undef CODE_FOR_MAIN\n"
<< "#define CODE_FOR_MAIN() \\\n"
<< " {short F;__asm__ (\"fnstcw %0\" : \"=m\" (*&F)); \\\n"
<< " F=(F&~0x300)|0x200;__asm__(\"fldcw %0\"::\"m\"(*&F));}\n"
<< "#endif\n#endif\n";
}
bool CWriter::doInitialization(Module &M) {
@ -1140,7 +1151,7 @@ void CWriter::printFunction(Function &F) {
Out << '\n';
if (F.hasExternalLinkage() && F.getName() == "main")
printCodeForMain();
Out << " CODE_FOR_MAIN();\n";
// print the basic blocks
for (Function::iterator BB = F.begin(), E = F.end(); BB != E; ++BB) {
@ -1155,15 +1166,6 @@ void CWriter::printFunction(Function &F) {
Out << "}\n\n";
}
void CWriter::printCodeForMain() {
// On X86, set the FP control word to 64-bits of precision instead of 80 bits.
Out << "#if defined(__GNUC__) && !defined(__llvm__)\n"
<< "#if defined(i386) || defined(__i386__) || defined(__i386)\n"
<< "{short FPCW;__asm__ (\"fnstcw %0\" : \"=m\" (*&FPCW));\n"
<< "FPCW=(FPCW&~0x300)|0x200;__asm__(\"fldcw %0\" :: \"m\" (*&FPCW));}\n"
<< "#endif\n#endif\n";
}
void CWriter::printLoop(Loop *L) {
Out << " do { /* Syntactic loop '" << L->getHeader()->getName()
<< "' to make GCC happy */\n";