[Bug rtl-optimization/38245] [4.4 Regression] stack corruption when a call is removed but not the outgoing argument pushes

[ebotcazou 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