diff options
Diffstat (limited to 'llvm/lib/Target/X86/X86TargetMachine.cpp')
| -rw-r--r-- | llvm/lib/Target/X86/X86TargetMachine.cpp | 7 |
1 files changed, 6 insertions, 1 deletions
diff --git a/llvm/lib/Target/X86/X86TargetMachine.cpp b/llvm/lib/Target/X86/X86TargetMachine.cpp index df00d3ffcc7..2a93a2d5018 100644 --- a/llvm/lib/Target/X86/X86TargetMachine.cpp +++ b/llvm/lib/Target/X86/X86TargetMachine.cpp @@ -19,11 +19,15 @@ #include "llvm/CodeGen/Passes.h" #include "llvm/MC/MCCodeEmitter.h" #include "llvm/MC/MCStreamer.h" +#include "llvm/Support/CommandLine.h" #include "llvm/Support/FormattedStream.h" #include "llvm/Target/TargetOptions.h" #include "llvm/Target/TargetRegistry.h" using namespace llvm; +static cl::opt<bool> +LiveX87("live-x87", cl::desc("Allow live X87 registers across blocks")); + static MCAsmInfo *createMCAsmInfo(const Target &T, StringRef TT) { Triple TheTriple(TT); switch (TheTriple.getOS()) { @@ -183,7 +187,8 @@ bool X86TargetMachine::addInstSelector(PassManagerBase &PM, bool X86TargetMachine::addPreRegAlloc(PassManagerBase &PM, CodeGenOpt::Level OptLevel) { // Install a pass to insert x87 FP_REG_KILL instructions, as needed. - PM.add(createX87FPRegKillInserterPass()); + if (!LiveX87) + PM.add(createX87FPRegKillInserterPass()); PM.add(createX86MaxStackAlignmentHeuristicPass()); return false; // -print-machineinstr shouldn't print after this. |
