cfgcleanup would try to join noreturn paths with different components
handled. This then fails in dwarf2cfi.
2016-06-07 Segher Boessenkool <seg...@kernel.crashing.org>
* cfgcleanup.c (outgoing_edges_match): Don't join noreturn calls
if shrink_wrapped_separate.
---
gcc/cfgcleanup.c | 5 +++++
1 file changed, 5 insertions(+)
diff --git a/gcc/cfgcleanup.c b/gcc/cfgcleanup.c
index 023b9d2..e3f205b 100644
--- a/gcc/cfgcleanup.c
+++ b/gcc/cfgcleanup.c
@@ -1824,6 +1824,11 @@ outgoing_edges_match (int mode, basic_block bb1,
basic_block bb2)
|| !find_reg_note (last1, REG_ARGS_SIZE, NULL)))
return false;
+ /* If shrink-wrapping separate components, joining noreturn calls that
+ have different components set up will confuse dwarf2cfi. */
+ if (!nonfakeedges && crtl->shrink_wrapped_separate)
+ return false;
+
/* fallthru edges must be forwarded to the same destination. */
if (fallthru1)
{
--
1.9.3
