MC: add support for cfi_return_column
This adds support for the CFI pseudo-op return_column. This specifies
the frame table column which contains the return address.
Addresses PR33953!
llvm-svn: 309360
diff --git a/llvm/lib/MC/MCStreamer.cpp b/llvm/lib/MC/MCStreamer.cpp
index 2bfb9a6..e35907f 100644
--- a/llvm/lib/MC/MCStreamer.cpp
+++ b/llvm/lib/MC/MCStreamer.cpp
@@ -508,6 +508,12 @@
CurFrame->Instructions.push_back(Instruction);
}
+void MCStreamer::EmitCFIReturnColumn(int64_t Register) {
+ EnsureValidDwarfFrame();
+ MCDwarfFrameInfo *CurFrame = getCurrentDwarfFrameInfo();
+ CurFrame->RAReg = Register;
+}
+
void MCStreamer::EnsureValidWinFrameInfo() {
const MCAsmInfo *MAI = Context.getAsmInfo();
if (!MAI->usesWindowsCFI())