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| author | Richard Sandiford <richard.sandiford@arm.com> | 2019-09-30 16:21:07 +0000 |
|---|---|---|
| committer | Richard Sandiford <rsandifo@gcc.gnu.org> | 2019-09-30 16:21:07 +0000 |
| commit | 7187286ef3381ebde6377015fe776d6d11329a32 (patch) | |
| tree | b8883782b4098fb88d3045da443e50e98c141046 /gcc | |
| parent | 3df28f006a7ceaf958a9ce9d100dd1e266e18f26 (diff) | |
| download | gcc-7187286ef3381ebde6377015fe776d6d11329a32.zip gcc-7187286ef3381ebde6377015fe776d6d11329a32.tar.gz gcc-7187286ef3381ebde6377015fe776d6d11329a32.tar.bz2 | |
Remove global call sets: postreload-gcse.c
This is another case in which we should conservatively treat
partial kills as full kills.
2019-09-30 Richard Sandiford <richard.sandiford@arm.com>
gcc/
* postreload-gcse.c: Include regs.h and function-abi.h.
(record_opr_changes): Use insn_callee_abi to get the ABI of the
call insn target. Conservatively assume that partially-clobbered
registers are altered.
From-SVN: r276329
Diffstat (limited to 'gcc')
| -rw-r--r-- | gcc/ChangeLog | 7 | ||||
| -rw-r--r-- | gcc/postreload-gcse.c | 8 |
2 files changed, 14 insertions, 1 deletions
diff --git a/gcc/ChangeLog b/gcc/ChangeLog index 208d32f..a30c38d 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -1,5 +1,12 @@ 2019-09-30 Richard Sandiford <richard.sandiford@arm.com> + * postreload-gcse.c: Include regs.h and function-abi.h. + (record_opr_changes): Use insn_callee_abi to get the ABI of the + call insn target. Conservatively assume that partially-clobbered + registers are altered. + +2019-09-30 Richard Sandiford <richard.sandiford@arm.com> + * postreload.c (reload_combine_recognize_pattern): Use crtl->abi when deciding whether a register is free for use after RA. (reload_combine): Remove unnecessary use of fixed_reg_set. diff --git a/gcc/postreload-gcse.c b/gcc/postreload-gcse.c index a709838..0c12b38 100644 --- a/gcc/postreload-gcse.c +++ b/gcc/postreload-gcse.c @@ -41,6 +41,8 @@ along with GCC; see the file COPYING3. If not see #include "intl.h" #include "gcse-common.h" #include "gcse.h" +#include "regs.h" +#include "function-abi.h" /* The following code implements gcse after reload, the purpose of this pass is to cleanup redundant loads generated by reload and other @@ -772,7 +774,11 @@ record_opr_changes (rtx_insn *insn) { unsigned int regno; 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_regno (insn, regno); if (! RTL_CONST_OR_PURE_CALL_P (insn)) |