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| author | Richard Biener <rguenther@suse.de> | 2023-01-09 09:42:22 +0100 |
|---|---|---|
| committer | Richard Biener <rguenther@suse.de> | 2023-01-11 13:13:50 +0100 |
| commit | f99d7d669eaa2830eb5878df4da67e77ec791522 (patch) | |
| tree | feea70ad9071ddde1440fbb8c422c964fa23699d /gcc/function.cc | |
| parent | b39c1bea5bae9aee1df25cab1064f983b9ec6941 (diff) | |
| download | gcc-f99d7d669eaa2830eb5878df4da67e77ec791522.zip gcc-f99d7d669eaa2830eb5878df4da67e77ec791522.tar.gz gcc-f99d7d669eaa2830eb5878df4da67e77ec791522.tar.bz2 | |
tree-optimization/107767 - not profitable switch conversion
When the CFG has not merged equal PHI defs in a switch stmt the
cost model from switch conversion gets off and we prefer a
jump table over branches. The following fixes that by recording
cases that will be merged later and more appropriately counting
unique values.
PR tree-optimization/107767
* tree-cfgcleanup.cc (phi_alternatives_equal): Export.
* tree-cfgcleanup.h (phi_alternatives_equal): Declare.
* tree-switch-conversion.cc (switch_conversion::collect):
Count unique non-default targets accounting for later
merging opportunities.
* gcc.dg/tree-ssa/pr107767.c: New testcase.
Diffstat (limited to 'gcc/function.cc')
0 files changed, 0 insertions, 0 deletions