From 18335f89257bd951b9c980b414ca7fe4deebc9f2 Mon Sep 17 00:00:00 2001 From: Chris Lattner Date: Fri, 6 May 2005 06:58:42 +0000 Subject: [PATCH] clean up the CBE output a bit llvm-svn: 21740 --- llvm/lib/Target/CBackend/Writer.cpp | 28 +++++++++++++++------------- 1 file changed, 15 insertions(+), 13 deletions(-) diff --git a/llvm/lib/Target/CBackend/Writer.cpp b/llvm/lib/Target/CBackend/Writer.cpp index be124b0501ef..282d013047c1 100644 --- a/llvm/lib/Target/CBackend/Writer.cpp +++ b/llvm/lib/Target/CBackend/Writer.cpp @@ -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";