More DWARF-related things cleanup:

1. Fix PR1380
2. Apply Duncan's patch from PR1410
3. Insert workaround for "one personality function per module" as noted in PR1414
4. Emit correct debug frames for x86/linux. This partly fixes DebugInfo/2006-11-06-StackTrace.cpp: stack trace is
shown correctly, but arguments for function on top of stack are displayed incorrectly.

llvm-svn: 37015

1 files changed, 10 insertions, 7 deletions

diff --git a/llvm/lib/Target/X86/X86RegisterInfo.cpp b/llvm/lib/Target/X86/X86RegisterInfo.cpp
index 06d12b0a429..30d029f6ca1 100644
--- a/llvm/lib/Target/X86/X86RegisterInfo.cpp
+++ b/llvm/lib/Target/X86/X86RegisterInfo.cpp
@@ -1153,11 +1153,6 @@ void X86RegisterInfo::emitPrologue(MachineFunction &MF) const {
        TargetFrameInfo::StackGrowsUp ?
        TAI->getAddressSize() : -TAI->getAddressSize());
 
-    // Add return address to move list
-    MachineLocation CSDst(StackPtr, stackGrowth);
-    MachineLocation CSSrc(getRARegister());
-    Moves.push_back(MachineMove(StartLabelId, CSDst, CSSrc));
-
     if (NumBytes) {
       // Show update of SP.
       if (hasFP(MF)) {
@@ -1282,10 +1277,18 @@ unsigned X86RegisterInfo::getFrameRegister(MachineFunction &MF) const {
 
 void X86RegisterInfo::getInitialFrameState(std::vector<MachineMove> &Moves)
                                                                          const {
-  // Initial state of the frame pointer is esp.
+  // Calculate amount of bytes used for return address storing
+  int stackGrowth = (Is64Bit ? -8 : -4);
+
+  // Initial state of the frame pointer is esp+4.
   MachineLocation Dst(MachineLocation::VirtualFP);
-  MachineLocation Src(StackPtr, 0);
+  MachineLocation Src(StackPtr, stackGrowth);
   Moves.push_back(MachineMove(0, Dst, Src));
+
+  // Add return address to move list
+  MachineLocation CSDst(StackPtr, stackGrowth);
+  MachineLocation CSSrc(getRARegister());
+  Moves.push_back(MachineMove(0, CSDst, CSSrc));
 }
 
 unsigned X86RegisterInfo::getEHExceptionRegister() const {