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| author | Vladimir N. Makarov <vmakarov@redhat.com> | 2023-09-28 11:53:51 -0400 |
|---|---|---|
| committer | Vladimir N. Makarov <vmakarov@redhat.com> | 2023-09-28 11:57:45 -0400 |
| commit | 8552dcd8e4448c02fe230662093756b75dd94399 (patch) | |
| tree | aa2c4017e437000ad2f2f39237d9db44eb71214a /gcc | |
| parent | d8b56c95782aeeee79ec40932ca88d00fd9f2ee2 (diff) | |
| download | gcc-8552dcd8e4448c02fe230662093756b75dd94399.zip gcc-8552dcd8e4448c02fe230662093756b75dd94399.tar.gz gcc-8552dcd8e4448c02fe230662093756b75dd94399.tar.bz2 | |
Revert "[RA]: Improve cost calculation of pseudos with equivalences"
This reverts commit 3c834d85f2ec42c60995c2b678196a06cb744959.
Although the patch improves x86-64 specfp2007, it also results in
performance and code size regression on different targets and
new GCC testsuite failures on tests expecting a specific output.
Diffstat (limited to 'gcc')
| -rw-r--r-- | gcc/ira-costs.cc | 11 |
1 files changed, 9 insertions, 2 deletions
diff --git a/gcc/ira-costs.cc b/gcc/ira-costs.cc index 8c93ace..d9e700e 100644 --- a/gcc/ira-costs.cc +++ b/gcc/ira-costs.cc @@ -1947,8 +1947,15 @@ find_costs_and_classes (FILE *dump_file) } if (i >= first_moveable_pseudo && i < last_moveable_pseudo) i_mem_cost = 0; - else - i_mem_cost -= equiv_savings; + else if (equiv_savings < 0) + i_mem_cost = -equiv_savings; + else if (equiv_savings > 0) + { + i_mem_cost = 0; + for (k = cost_classes_ptr->num - 1; k >= 0; k--) + i_costs[k] += equiv_savings; + } + best_cost = (1 << (HOST_BITS_PER_INT - 2)) - 1; best = ALL_REGS; alt_class = NO_REGS; |