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[Bug tree-optimization/69376] [6 Regression] wrong code at -Os and above on x86_64-linux-gnu
- From: "rguenth at gcc dot gnu.org" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: Fri, 22 Jan 2016 13:39:50 +0000
- Subject: [Bug tree-optimization/69376] [6 Regression] wrong code at -Os and above on x86_64-linux-gnu
- Auto-submitted: auto-generated
- References: <bug-69376-4 at http dot gcc dot gnu dot org/bugzilla/>
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=69376
--- Comment #5 from Richard Biener <rguenth at gcc dot gnu.org> ---
Created attachment 37433
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=37433&action=edit
patch
Patch that I have tested but which exposes another latent issue?
FAIL: 21_strings/basic_string/requirements/exception/generation_prohibited.cc
ex
ecution test
FAIL: ext/vstring/requirements/exception/generation_prohibited.cc execution
test
on x86_64 both -m32 and -m64 with allocating gigabytes of memory and eventually
throwing bad_alloc (). -fno-tree-pre recovers from this, so does -fno-tree-vrp
(as expected), so does disabling only vrp2 (or vrp1).