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| author | Xionghu Luo <luoxhu@linux.ibm.com> | 2021-12-28 19:09:14 -0600 |
|---|---|---|
| committer | Xionghu Luo <luoxhu@linux.ibm.com> | 2021-12-28 19:11:28 -0600 |
| commit | 44372676e81358de29d5c853685a7664a95d8a96 (patch) | |
| tree | 0a4e76fdcad408ddebe415e5886fa65c5c7b1104 /gcc/fortran/expr.c | |
| parent | 054e57e467b15677966f832b491b1584feb194ee (diff) | |
| download | gcc-44372676e81358de29d5c853685a7664a95d8a96.zip gcc-44372676e81358de29d5c853685a7664a95d8a96.tar.gz gcc-44372676e81358de29d5c853685a7664a95d8a96.tar.bz2 | |
Fix ICE in lsplit when built with -O3 -fno-guess-branch-probability [PR103793]
no-guess-branch-probability option requires profile_count scaling with
initialized_p guard, use multiply instead of apply_scale, which will do
the right thing to undefined probabilities and will not cause unnecesary
roundoff errors and precision info loss.
Also merge the missed part of r12-6086 of factor out function to avoid
duplicate code.
Regression testest pass on Power and X86.
gcc/ChangeLog:
PR tree-optimization/103793
* tree-ssa-loop-split.c (fix_loop_bb_probability): New function.
(split_loop): Use multiply to scale loop1's exit probability.
(do_split_loop_on_cond): Call fix_loop_bb_probability.
gcc/testsuite/ChangeLog:
PR tree-optimization/103793
* gcc.dg/pr103793.c: New test.
Diffstat (limited to 'gcc/fortran/expr.c')
0 files changed, 0 insertions, 0 deletions