Implemented Support of IA interrupt and exception handlers:

[oota-llvm.git] / lib / Target / X86 / X86MCInstLower.cpp

diff --git a/lib/Target/X86/X86MCInstLower.cpp b/lib/Target/X86/X86MCInstLower.cpp
index 8878c9f169b5b3227ce00e39ec2c6bad907d69bc..d0c03d6ab7c0399aa4b7cce6ba13f7b486d07571 100644 (file)
--- a/lib/Target/X86/X86MCInstLower.cpp
+++ b/lib/Target/X86/X86MCInstLower.cpp
@@ -1143,11 +1143,14 @@ void X86AsmPrinter::EmitInstruction(const MachineInstr *MI) {
     const X86FrameLowering* FrameLowering =
         MF->getSubtarget<X86Subtarget>().getFrameLowering();
     bool hasFP = FrameLowering->hasFP(*MF);
+    
+    // TODO: This is needed only if we require precise CFA.
+    bool HasActiveDwarfFrame = OutStreamer->getNumFrameInfos() &&
+                               !OutStreamer->getDwarfFrameInfos().back().End;
 
-    bool NeedsDwarfCFI = MMI->usePreciseUnwindInfo();
     int stackGrowth = -RI->getSlotSize();
 
-    if (NeedsDwarfCFI && !hasFP) {
+    if (HasActiveDwarfFrame && !hasFP) {
       OutStreamer->EmitCFIAdjustCfaOffset(-stackGrowth);
     }
 
@@ -1158,7 +1161,7 @@ void X86AsmPrinter::EmitInstruction(const MachineInstr *MI) {
     EmitAndCountInstruction(MCInstBuilder(X86::POP32r)
                             .addReg(MI->getOperand(0).getReg()));
 
-    if (NeedsDwarfCFI && !hasFP) {
+    if (HasActiveDwarfFrame && !hasFP) {
       OutStreamer->EmitCFIAdjustCfaOffset(stackGrowth);
     }
     return;