diff options
| author | J"orn Rennecke <joern.rennecke@superh.com> | 2003-11-22 14:18:48 +0000 |
|---|---|---|
| committer | Joern Rennecke <amylaar@gcc.gnu.org> | 2003-11-22 14:18:48 +0000 |
| commit | 249083758d18f86be080a87d0ec8630ad58c1f30 (patch) | |
| tree | 4cfdf829d7d0f5f2f97e1df25e84a2183686596d /gcc/flow.c | |
| parent | 3eee102eda9cf88ca7a8e1c007c48892aedb4d9b (diff) | |
| download | gcc-249083758d18f86be080a87d0ec8630ad58c1f30.zip gcc-249083758d18f86be080a87d0ec8630ad58c1f30.tar.gz gcc-249083758d18f86be080a87d0ec8630ad58c1f30.tar.bz2 | |
flow.c (update_life_info): Amend comment about when a register can become dead.
* flow.c (update_life_info): Amend comment about when a register
can become dead.
From-SVN: r73838
Diffstat (limited to 'gcc/flow.c')
| -rw-r--r-- | gcc/flow.c | 3 |
1 files changed, 3 insertions, 0 deletions
@@ -594,6 +594,9 @@ verify_local_live_at_start (regset new_live_at_start, basic_block bb) generates subregs of a multi-word pseudo, current life analysis will lose the kill. So we _can_ have a pseudo go live. How irritating. + It is also not true when a peephole decides that it doesn't need one + or more of the inputs. + Including PROP_REG_INFO does not properly refresh regs_ever_live unless the caller resets it to zero. */ |