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[Bug target/54989] FAIL: gcc.dg/hoist-register-pressure.c scan-rtl-dump hoist "PRE/HOIST: end of bb .* copying expression" on darwin
- From: "howarth at nitro dot med.uc.edu" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: Sat, 20 Oct 2012 17:11:16 +0000
- Subject: [Bug target/54989] FAIL: gcc.dg/hoist-register-pressure.c scan-rtl-dump hoist "PRE/HOIST: end of bb .* copying expression" on darwin
- Auto-submitted: auto-generated
- References: <bug-54989-4@http.gcc.gnu.org/bugzilla/>
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=54989
--- Comment #3 from Jack Howarth <howarth at nitro dot med.uc.edu> 2012-10-20 17:11:16 UTC ---
(In reply to comment #1)
> The failure is caused by higher register pressure in the THEN branch of the
> case, though I am not sure why the register pressure is higher than x86-linux.
>
In case it helps, the exact compiler defaults on darwin are...
# GNU C++ (GCC) version 4.8.0 20121019 (experimental)
(x86_64-apple-darwin12.2.0)
# compiled by GNU C version 4.8.0 20121019 (experimental), GMP version
5.0.5, MPFR version 3.1.1, MPC version 1.0.1
# GGC heuristics: --param ggc-min-expand=30 --param ggc-min-heapsize=4096
# options passed: -D__DYNAMIC__ t.cc -fPIC -mmacosx-version-min=10.8.2
# -mtune=core2 -fverbose-asm
# options enabled: -Wnonportable-cfstrings -fPIC
# -fasynchronous-unwind-tables -fauto-inc-dec -fbranch-count-reg -fcommon
# -fdelete-null-pointer-checks -fearly-inlining
# -feliminate-unused-debug-types -fexceptions -ffunction-cse -fgcse-lm
# -fident -finline-atomics -fira-hoist-pressure -fira-share-save-slots
# -fira-share-spill-slots -fivopts -fkeep-static-consts
# -fleading-underscore -fmath-errno -fmerge-debug-strings
# -fmove-loop-invariants -fnext-runtime -fobjc-abi-version= -fpeephole
# -fprefetch-loop-arrays -freg-struct-return
# -fsched-critical-path-heuristic -fsched-dep-count-heuristic
# -fsched-group-heuristic -fsched-interblock -fsched-last-insn-heuristic
# -fsched-rank-heuristic -fsched-spec -fsched-spec-insn-heuristic
# -fsched-stalled-insns-dep -fshow-column -fsigned-zeros
# -fsplit-ivs-in-unroller -fstrict-volatile-bitfields -fsync-libcalls
# -ftrapping-math -ftree-coalesce-vars -ftree-cselim -ftree-forwprop
# -ftree-loop-if-convert -ftree-loop-im -ftree-loop-ivcanon
# -ftree-loop-optimize -ftree-parallelize-loops= -ftree-phiprop -ftree-pta
# -ftree-reassoc -ftree-scev-cprop -ftree-slp-vectorize
# -ftree-vect-loop-version -funit-at-a-time -funwind-tables -fverbose-asm
# -fzero-initialized-in-bss -gstrict-dwarf -m128bit-long-double -m64
# -m80387 -maccumulate-outgoing-args -malign-stringops -matt-stubs
# -mconstant-cfstrings -mfancy-math-387 -mfp-ret-in-387 -mieee-fp
# -mlong-double-80 -mmmx -mno-sse4 -mpush-args -mred-zone -msse -msse2
# -msse3