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[Bug target/66112] __builtin_mul_overflow for int16_t emits poor 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: Wed, 13 May 2015 08:09:33 +0000
- Subject: [Bug target/66112] __builtin_mul_overflow for int16_t emits poor code
- Auto-submitted: auto-generated
- References: <bug-66112-4 at http dot gcc dot gnu dot org/bugzilla/>
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66112
--- Comment #10 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Wed May 13 08:09:01 2015
New Revision: 223116
URL: https://gcc.gnu.org/viewcvs?rev=223116&root=gcc&view=rev
Log:
PR target/66112
* config/i386/i386.md (mulv<mode>4, umulv<mode>4, *umulv<mode>4):
Use SWI248 iterator instead of SWI.
(*mulv<mode>4_1): Use SWI48 instead of SWI. Simplify output template.
Use eq_attr "alternative" "0" instead of match_test in
length_immediate attribute computation.
(*mulvhi4, *mulvhi4_1): New define_insns.
* gcc.target/i386/pr66112-2.c: New test.
Added:
trunk/gcc/testsuite/gcc.target/i386/pr66112-2.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/config/i386/i386.md
trunk/gcc/testsuite/ChangeLog