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| author | Alexander Monakov <amonakov@ispras.ru> | 2023-01-13 21:04:02 +0300 |
|---|---|---|
| committer | Alexander Monakov <amonakov@ispras.ru> | 2023-01-13 21:33:14 +0300 |
| commit | 733a1b777f16cd397b43a242d9c31761f66d3da8 (patch) | |
| tree | aecfd13965c06cc086077992307d31d06a75714f /libgcc/fixed-bit.c | |
| parent | b4b1c6aa6d28d3afe989a6dc3210606a3d55a367 (diff) | |
| download | gcc-733a1b777f16cd397b43a242d9c31761f66d3da8.zip gcc-733a1b777f16cd397b43a242d9c31761f66d3da8.tar.gz gcc-733a1b777f16cd397b43a242d9c31761f66d3da8.tar.bz2 | |
sched-deps: do not schedule pseudos across calls [PR108117]
Scheduling across calls in the pre-RA scheduler is problematic: we do
not take liveness info into account, and are thus prone to extending
lifetime of a pseudo over the loop, requiring a callee-saved hardreg
or causing a spill.
If current function called a setjmp, lifting an assignment over a call
may be incorrect if a longjmp would happen before the assignment.
Thanks to Jose Marchesi for testing on AArch64.
gcc/ChangeLog:
PR rtl-optimization/108117
PR rtl-optimization/108132
* sched-deps.cc (deps_analyze_insn): Do not schedule across
calls before reload.
gcc/testsuite/ChangeLog:
PR rtl-optimization/108117
PR rtl-optimization/108132
* gcc.dg/pr108117.c: New test.
Diffstat (limited to 'libgcc/fixed-bit.c')
0 files changed, 0 insertions, 0 deletions