diff options
| author | Andrew Pinski <quic_apinski@quicinc.com> | 2024-04-30 14:45:26 -0700 |
|---|---|---|
| committer | Andrew Pinski <quic_apinski@quicinc.com> | 2024-05-07 14:41:15 -0700 |
| commit | e472527c7b45d23e8dfd0fb767a6e663b4bc136e (patch) | |
| tree | 5926e0837501251d372a701b24c9aeefac966c33 /gcc/tree-vect-patterns.cc | |
| parent | 9f14f1978260148d4d6208dfd73df1858e623758 (diff) | |
| download | gcc-e472527c7b45d23e8dfd0fb767a6e663b4bc136e.zip gcc-e472527c7b45d23e8dfd0fb767a6e663b4bc136e.tar.gz gcc-e472527c7b45d23e8dfd0fb767a6e663b4bc136e.tar.bz2 | |
MATCH: Add some more value_replacement simplifications (a != 0 ? expr : 0) to match
This adds a few more of what is currently done in phiopt's value_replacement
to match. I noticed this when I was hooking up phiopt's value_replacement
code to use match and disabling the old code. But this can be done
independently from the hooking up phiopt's value_replacement as phiopt
is already hooked up for simplified versions already.
/* a != 0 ? a / b : 0 -> a / b iff b is nonzero. */
/* a != 0 ? a * b : 0 -> a * b */
/* a != 0 ? a & b : 0 -> a & b */
We prefer the `cond ? a : 0` forms to allow optimization of `a * cond` which
uses that form.
Bootstrapped and tested on x86_64-linux-gnu with no regressions.
PR tree-optimization/114894
gcc/ChangeLog:
* match.pd (`a != 0 ? a / b : 0`): New pattern.
(`a != 0 ? a * b : 0`): New pattern.
(`a != 0 ? a & b : 0`): New pattern.
gcc/testsuite/ChangeLog:
* gcc.dg/tree-ssa/phi-opt-value-5.c: New test.
Signed-off-by: Andrew Pinski <quic_apinski@quicinc.com>
Diffstat (limited to 'gcc/tree-vect-patterns.cc')
0 files changed, 0 insertions, 0 deletions