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[Bug tree-optimization/80155] [7 regression] Performance regression with code hoisting enabled
- From: "rguenth at gcc dot gnu.org" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: Thu, 23 Mar 2017 12:39:30 +0000
- Subject: [Bug tree-optimization/80155] [7 regression] Performance regression with code hoisting enabled
- Auto-submitted: auto-generated
- References: <bug-80155-4@http.gcc.gnu.org/bugzilla/>
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80155
--- Comment #11 from Richard Biener <rguenth at gcc dot gnu.org> ---
Ok, the 2nd level opportunitues are important. So the 2nd candidate remains
for the loop carried dependencies issue(s). Regresses (on x86_64):
Running target unix/{,-m32}
FAIL: gcc.dg/store-motion-fgcse-sm.c scan-rtl-dump store_motion "STORE_MOTION
of f, .* basic blocks, 1 insns deleted, 1 insns created"
FAIL: gcc.dg/tree-ssa/loadpre10.c scan-tree-dump-times pre "Eliminated: 1" 1
FAIL: gcc.dg/tree-ssa/loadpre23.c scan-tree-dump-times pre "Eliminated: 1" 1
FAIL: gcc.dg/tree-ssa/loadpre24.c scan-tree-dump-times pre "Eliminated: 1" 1
FAIL: gcc.dg/tree-ssa/loadpre25.c scan-tree-dump-times pre "Eliminated: 1" 1
FAIL: gcc.dg/tree-ssa/loadpre4.c scan-tree-dump-times pre "Eliminated: 1" 1
FAIL: gcc.dg/tree-ssa/loadpre6.c scan-tree-dump-times pre "Eliminated: 1" 1
FAIL: gcc.dg/tree-ssa/pr21417.c scan-tree-dump-times thread4 "FSM jump thread"
1
FAIL: gcc.dg/tree-ssa/pr71347.c scan-tree-dump-not optimized ".* = MEM.*;"
FAIL: gcc.dg/tree-ssa/ssa-pre-23.c scan-tree-dump pre "Eliminated: 3"
FAIL: gcc.target/i386/pr49781-1.c scan-assembler-not lea[lq]?[
\\t]\\\\((%|)r[a-z0-9]*
most of them are expected and looking for the feature we disabled. loadpre6,
pr21417.c and pr49781-1.c need a closer look.