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[Bug rtl-optimization/38245] [4.4 Regression] stack corruption when a call is removed but not the outgoing argument pushes
- From: "ebotcazou at gcc dot gnu dot org" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: 7 Jan 2009 06:34:10 -0000
- Subject: [Bug rtl-optimization/38245] [4.4 Regression] stack corruption when a call is removed but not the outgoing argument pushes
- References: <bug-38245-12544@http.gcc.gnu.org/bugzilla/>
- Reply-to: gcc-bugzilla at gcc dot gnu dot org
------- Comment #20 from ebotcazou at gcc dot gnu dot org 2009-01-07 06:34 -------
> Most "interesting" libcalls for x86 -m32 probably are the DImode ones, and if
> subreg lowering does this for all arguments, we would have to update the
> REG_REP notes in the CALL_INSN, or do a lot of DSE-like work...
What about canonicalizing the modes in CALL_INSN_FUNCTION_USAGE to word mode
or smaller, like for hard registers? Would this make the DSE-like work more
or less trivial?
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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=38245