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[Bug rtl-optimization/51447] [4.4/4.5/4.6/4.7 Regression] global register variable definition incorrectly removed as dead code
- From: "jakub at gcc dot gnu.org" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: Thu, 15 Dec 2011 11:32:06 +0000
- Subject: [Bug rtl-optimization/51447] [4.4/4.5/4.6/4.7 Regression] global register variable definition incorrectly removed as dead code
- Auto-submitted: auto-generated
- References: <bug-51447-4@http.gcc.gnu.org/bugzilla/>
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=51447
--- Comment #7 from Jakub Jelinek <jakub at gcc dot gnu.org> 2011-12-15 11:32:06 UTC ---
Created attachment 26100
--> http://gcc.gnu.org/bugzilla/attachment.cgi?id=26100
gcc47-pr51447.patch
While that fixes the testcase at -O1, at -O2 and above it still fails.
Apparently ud_dce pass removes it.