1 files changed, 10 insertions, 0 deletions
diff --git a/lib/Target/X86/X86TargetMachine.cpp b/lib/Target/X86/X86TargetMachine.cpp
index eb4d19a778..fba8e8dc9e 100644
--- a/lib/Target/X86/X86TargetMachine.cpp
+++ b/lib/Target/X86/X86TargetMachine.cpp
@@ -76,6 +76,11 @@ bool X86TargetMachine::addPassesToEmitAssembly(PassManager &PM,
   if (PrintCode)
     PM.add(createMachineFunctionPrinterPass());
 
+  // kill floating point registers at the end of basic blocks. this is
+  // done because the floating point register stackifier cannot handle
+  // floating point regs that are live across basic blocks.
+  PM.add(createX86FloatingPointKillerPass());
+
   // Perform register allocation to convert to a concrete x86 representation
   PM.add(createRegisterAllocator());
 
@@ -129,6 +134,11 @@ bool X86TargetMachine::addPassesToJITCompile(FunctionPassManager &PM) {
   if (PrintCode)
     PM.add(createMachineFunctionPrinterPass());
 
+  // kill floating point registers at the end of basic blocks. this is
+  // done because the floating point register stackifier cannot handle
+  // floating point regs that are live across basic blocks.
+  PM.add(createX86FloatingPointKillerPass());
+
   // Perform register allocation to convert to a concrete x86 representation
   PM.add(createRegisterAllocator());