Some autoconf tests use module level inline asm to test compiler's handling of
.cfi_startproc. e.g. libffi:
$ cat confopt.c
asm (".cfi_startproc\n\t.cfi_endproc");
int main () { return 0; }
Teach MC / dwarf emission to handle these cfi directives which essentially
create an empty frame.
rdar://10017184
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@138504 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/MC/MCStreamer.cpp b/lib/MC/MCStreamer.cpp
index 5295d0f..7e3d7a6 100644
--- a/lib/MC/MCStreamer.cpp
+++ b/lib/MC/MCStreamer.cpp
@@ -190,14 +190,14 @@
MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
if (CurFrame && !CurFrame->End)
report_fatal_error("Starting a frame before finishing the previous one!");
- MCDwarfFrameInfo Frame;
+ MCDwarfFrameInfo Frame;
Frame.Function = LastSymbol;
// If the function is externally visible, we need to create a local
// symbol to avoid relocations.
StringRef Prefix = getContext().getAsmInfo().getPrivateGlobalPrefix();
- if (LastSymbol->getName().startswith(Prefix)) {
+ if (LastSymbol && LastSymbol->getName().startswith(Prefix)) {
Frame.Begin = LastSymbol;
} else {
Frame.Begin = getContext().CreateTempSymbol();