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[Bug target/53914] poor code generated for offset addressing on ppc32
- From: "amodra at gmail dot com" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: Tue, 10 Jul 2012 13:32:47 +0000
- Subject: [Bug target/53914] poor code generated for offset addressing on ppc32
- Auto-submitted: auto-generated
- References: <bug-53914-4@http.gcc.gnu.org/bugzilla/>
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=53914
Alan Modra <amodra at gmail dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Target| |powerpc-linux
--- Comment #1 from Alan Modra <amodra at gmail dot com> 2012-07-10 13:32:47 UTC ---
Appears to be caused by "o" constraint in movdi_internal32 used for gpr->mem
disallowing offsets larger than 32k-12 due to rs6000_mode_dependent_address.
"m" is used for fpr->mem, so reload chooses a fpr.