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r242090 - /branches/ARM/sve-branch/gcc/alias.c
- From: rsandifo at gcc dot gnu dot org
- To: gcc-cvs at gcc dot gnu dot org
- Date: Fri, 11 Nov 2016 16:57:50 -0000
- Subject: r242090 - /branches/ARM/sve-branch/gcc/alias.c
Author: rsandifo
Date: Fri Nov 11 16:57:50 2016
New Revision: 242090
URL: https://gcc.gnu.org/viewcvs?rev=242090&root=gcc&view=rev
Log:
Use simplify_gen_binary in canon_rtx
After simplifying the operands of a PLUS, canon_rtx checked only
for cases in which one of the simplified operands was a constant,
falling back to gen_rtx_PLUS otherwise. This left the PLUS in a
non-canonical order if one of the simplified operands was
(plus (reg R1) (const_int X)); we'd end up with:
(plus (plus (reg R1) (const_int Y)) (reg R2))
rather than:
(plus (plus (reg R1) (reg R2)) (const_int Y))
Fixing this exposed new DSE opportunities on spu-elf in
gcc.c-torture/execute/builtins/strcat-chk.c but otherwise
it doesn't seem to have much practical effect.
Modified:
branches/ARM/sve-branch/gcc/alias.c