diff options
| author | Claudiu Zissulescu <claziss@synopsys.com> | 2013-09-06 19:27:54 +0200 |
|---|---|---|
| committer | Joern Rennecke <amylaar@gcc.gnu.org> | 2013-09-06 18:27:54 +0100 |
| commit | c42091c1b505de009cea3420537a5453d81d0165 (patch) | |
| tree | e9d3367377ae74b0cd5bae6deee44fccdc09158d /gcc/resource.c | |
| parent | 2c641f8b3a3059353ac6f8798d10d2f5c611109b (diff) | |
| download | gcc-c42091c1b505de009cea3420537a5453d81d0165.zip gcc-c42091c1b505de009cea3420537a5453d81d0165.tar.gz gcc-c42091c1b505de009cea3420537a5453d81d0165.tar.bz2 | |
resource.c (mark_target_live_regs): Compute resources taking into account if a call is predicated or not.
2013-09-06 Claudiu Zissulescu <claziss@synopsys.com>
* resource.c (mark_target_live_regs): Compute resources taking
into account if a call is predicated or not.
From-SVN: r202343
Diffstat (limited to 'gcc/resource.c')
| -rw-r--r-- | gcc/resource.c | 17 |
1 files changed, 12 insertions, 5 deletions
diff --git a/gcc/resource.c b/gcc/resource.c index a0fd2ec..919cffb 100644 --- a/gcc/resource.c +++ b/gcc/resource.c @@ -994,11 +994,18 @@ mark_target_live_regs (rtx insns, rtx target, struct resources *res) if (CALL_P (real_insn)) { - /* CALL clobbers all call-used regs that aren't fixed except - sp, ap, and fp. Do this before setting the result of the - call live. */ - AND_COMPL_HARD_REG_SET (current_live_regs, - regs_invalidated_by_call); + /* Values in call-clobbered registers survive a COND_EXEC CALL + if that is not executed; this matters for resoure use because + they may be used by a complementarily (or more strictly) + predicated instruction, or if the CALL is NORETURN. */ + if (GET_CODE (PATTERN (real_insn)) != COND_EXEC) + { + /* CALL clobbers all call-used regs that aren't fixed except + sp, ap, and fp. Do this before setting the result of the + call live. */ + AND_COMPL_HARD_REG_SET (current_live_regs, + regs_invalidated_by_call); + } /* A CALL_INSN sets any global register live, since it may have been modified by the call. */ |