summaryrefslogtreecommitdiff
path: root/lib/CodeGen/MachineModuleInfo.cpp
diff options
context:
space:
mode:
Diffstat (limited to 'lib/CodeGen/MachineModuleInfo.cpp')
-rw-r--r--lib/CodeGen/MachineModuleInfo.cpp35
1 files changed, 34 insertions, 1 deletions
diff --git a/lib/CodeGen/MachineModuleInfo.cpp b/lib/CodeGen/MachineModuleInfo.cpp
index 8af9d053b1..74cf9f50df 100644
--- a/lib/CodeGen/MachineModuleInfo.cpp
+++ b/lib/CodeGen/MachineModuleInfo.cpp
@@ -268,6 +268,39 @@ MachineModuleInfo::MachineModuleInfo()
MachineModuleInfo::~MachineModuleInfo() {
}
+static MCCFIInstruction convertMoveToCFI(const MCRegisterInfo &MRI,
+ MCSymbol *Label,
+ const MachineLocation &Dst,
+ const MachineLocation &Src) {
+ // If advancing cfa.
+ if (Dst.isReg() && Dst.getReg() == MachineLocation::VirtualFP) {
+ if (Src.getReg() == MachineLocation::VirtualFP)
+ return MCCFIInstruction::createDefCfaOffset(Label, Src.getOffset());
+ // Reg + Offset
+ return MCCFIInstruction::createDefCfa(
+ Label, MRI.getDwarfRegNum(Src.getReg(), true), -Src.getOffset());
+ }
+
+ if (Src.isReg() && Src.getReg() == MachineLocation::VirtualFP) {
+ assert(Dst.isReg() && "Machine move not supported yet.");
+ return MCCFIInstruction::createDefCfaRegister(
+ Label, MRI.getDwarfRegNum(Dst.getReg(), true));
+ }
+
+ assert(!Dst.isReg() && "Machine move not supported yet.");
+ return MCCFIInstruction::createOffset(
+ Label, MRI.getDwarfRegNum(Src.getReg(), true), Dst.getOffset());
+}
+
+
+void MachineModuleInfo::addFrameMove(MCSymbol *Label,
+ const MachineLocation &Dst,
+ const MachineLocation &Src) {
+ MCCFIInstruction I =
+ convertMoveToCFI(Context.getRegisterInfo(), Label, Dst, Src);
+ FrameInstructions.push_back(I);
+}
+
bool MachineModuleInfo::doInitialization(Module &M) {
ObjFileMMI = 0;
@@ -303,7 +336,7 @@ bool MachineModuleInfo::doFinalization(Module &M) {
///
void MachineModuleInfo::EndFunction() {
// Clean up frame info.
- FrameMoves.clear();
+ FrameInstructions.clear();
// Clean up exception info.
LandingPads.clear();