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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
This commit is contained in:
Richard Sandiford 2019-09-30 16:21:07 +00:00 committed by Richard Sandiford
parent 3df28f006a
commit 7187286ef3
2 changed files with 14 additions and 1 deletions
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7
gcc/ChangeLog
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@ -1,3 +1,10 @@
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

8
gcc/postreload-gcse.c
View File

@ -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))