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| author | Richard Sandiford <richard.sandiford@arm.com> | 2019-09-30 16:20:44 +0000 |
|---|---|---|
| committer | Richard Sandiford <rsandifo@gcc.gnu.org> | 2019-09-30 16:20:44 +0000 |
| commit | a4dfaad2e5594d871fe00a1116005e28f95d644e (patch) | |
| tree | 3233d2242a991f2f03d526e2a5f4919768029e6c /gcc/gcse.c | |
| parent | c1b582720a39c3cb944aaff0298f721cdd034e3f (diff) | |
| download | gcc-a4dfaad2e5594d871fe00a1116005e28f95d644e.zip gcc-a4dfaad2e5594d871fe00a1116005e28f95d644e.tar.gz gcc-a4dfaad2e5594d871fe00a1116005e28f95d644e.tar.bz2 | |
Remove global call sets: gcse.c
This is another case in which we can conservatively treat partial
kills as full kills. Again this is in principle a bug fix for
TARGET_HARD_REGNO_CALL_PART_CLOBBERED targets, but in practice
it probably doesn't make a difference.
2019-09-30 Richard Sandiford <richard.sandiford@arm.com>
gcc/
* gcse.c: Include function-abi.h.
(compute_hash_table_work): Use insn_callee_abi to get the ABI of
the call insn target. Invalidate partially call-clobbered
registers as well as fully call-clobbered ones.
From-SVN: r276323
Diffstat (limited to 'gcc/gcse.c')
| -rw-r--r-- | gcc/gcse.c | 10 |
1 files changed, 8 insertions, 2 deletions
@@ -160,6 +160,7 @@ along with GCC; see the file COPYING3. If not see #include "dbgcnt.h" #include "gcse.h" #include "gcse-common.h" +#include "function-abi.h" /* We support GCSE via Partial Redundancy Elimination. PRE optimizations are a superset of those done by classic GCSE. @@ -1528,8 +1529,13 @@ compute_hash_table_work (struct gcse_hash_table_d *table) if (CALL_P (insn)) { hard_reg_set_iterator hrsi; - EXECUTE_IF_SET_IN_HARD_REG_SET (regs_invalidated_by_call, - 0, regno, hrsi) + + /* We don't track modes of hard registers, so we need + to be conservative and assume that partial kills + are full kills. */ + HARD_REG_SET callee_clobbers + = insn_callee_abi (insn).full_and_partial_reg_clobbers (); + EXECUTE_IF_SET_IN_HARD_REG_SET (callee_clobbers, 0, regno, hrsi) record_last_reg_set_info (insn, regno); if (! RTL_CONST_OR_PURE_CALL_P (insn) |