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author | Richard Biener <rguenther@suse.de> | 2023-02-07 13:01:12 +0100 |
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committer | Richard Biener <rguenther@suse.de> | 2023-02-07 14:39:31 +0100 |
commit | 295adfc9ed20468cdaba3afe258d57b58a8df792 (patch) | |
tree | 7f2c76fd7eefb95476d6ac1192cf1625f67acf35 /gcc/ira.h | |
parent | 5321d53279a60ee589a3c9779beb46503f9fc49f (diff) | |
download | gcc-295adfc9ed20468cdaba3afe258d57b58a8df792.zip gcc-295adfc9ed20468cdaba3afe258d57b58a8df792.tar.gz gcc-295adfc9ed20468cdaba3afe258d57b58a8df792.tar.bz2 |
tree-optimization/26854 - compile-time hog in SSA forwprop
The following addresses
tree forward propagate : 12.41 ( 9%)
seen with the compile.i testcase of this PR which points at
the has_use_on_stmt function which, for SSA names with many
uses is slow. The solution is to instead of immediate uses,
look at stmt operands to identify whether a name has a use
on a stmt. That improves SSA forwprop to
tree forward propagate : 1.30 ( 0%)
for this testcase.
PR tree-optimization/26854
* gimple-fold.cc (has_use_on_stmt): Look at stmt operands
instead of immediate uses.
Diffstat (limited to 'gcc/ira.h')
0 files changed, 0 insertions, 0 deletions