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[patch committed] Fix target/40313
- From: Kaz Kojima <kkojima at rr dot iij4u dot or dot jp>
- To: gcc-patches at gcc dot gnu dot org
- Date: Mon, 01 Jun 2009 06:51:02 +0900 (JST)
- Subject: [patch committed] Fix target/40313
I've applied the attached patch to fix PR target/40313.
In failing case, insn scheduling after reload pass moves a frame
related insn in the prologue after NOTE_INSN_EPILOGUE_BEG note
and this confuses dwarf2out_begin_epilogue. The patch emits
a blockage insn before such insn in that situation. This may
make a difference of the codes with/without -g which isn't good
in general, but I guess it wouldn't be a real problem in this
specific situation because if such movement of the frame related
insn happened, then no one can expect -g works well in the first
The patch is tested with bootstrap and the top level "make -k
check" on sh4-unknown-linux-gnu with no new failures.
2009-05-31 Kaz Kojima <firstname.lastname@example.org>
* config/sh/sh.c: Include debug.h.
(sh_expand_epilogue): Emit a blockage insn before the frame
pointer adjustment also when dwarf2out_do_frame returns true.
--- ORIG/trunk/gcc/config/sh/sh.c 2009-05-30 18:35:42.000000000 +0900
+++ trunk/gcc/config/sh/sh.c 2009-05-31 08:46:05.000000000 +0900
@@ -43,6 +43,7 @@ along with GCC; see the file COPYING3.
@@ -6747,8 +6748,9 @@ sh_expand_epilogue (bool sibcall_p)
/* We must avoid scheduling the epilogue with previous basic blocks
- when exception handling is enabled. See PR/18032. */
- if (flag_exceptions)
+ when exception handling or frame information is needed.
+ See PR/18032 and PR/40313. */
+ if (flag_exceptions || dwarf2out_do_frame ())
emit_insn (gen_blockage ());
output_stack_adjust (frame_size, hard_frame_pointer_rtx, e,