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Remove global call sets: regcprop.c 

This is a direct replacement of an existing test for fully and
partially clobbered registers.

2019-09-30  Richard Sandiford  <richard.sandiford@arm.com>

gcc/
	* regcprop.c (copyprop_hardreg_forward_1): Use the recorded
	mode of the register when deciding whether it is no longer
	available after a call.

From-SVN: r276331
This commit is contained in:
Richard Sandiford 2019-09-30 16:21:14 +00:00 committed by Richard Sandiford
parent 35b81ea3f7
commit 30503f4ea4
2 changed files with 11 additions and 6 deletions
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6
gcc/ChangeLog
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@ -1,3 +1,9 @@
2019-09-30 Richard Sandiford <richard.sandiford@arm.com>
* regcprop.c (copyprop_hardreg_forward_1): Use the recorded
mode of the register when deciding whether it is no longer
available after a call.
2019-09-30 Richard Sandiford <richard.sandiford@arm.com>
* recog.c: Include function-abi.h.

11
gcc/regcprop.c
View File

@ -1055,16 +1055,15 @@ copyprop_hardreg_forward_1 (basic_block bb, struct value_data *vd)
function_abi callee_abi = insn_callee_abi (insn);
for (regno = 0; regno < FIRST_PSEUDO_REGISTER; regno++)
if ((callee_abi.clobbers_full_reg_p (regno)
|| (targetm.hard_regno_call_part_clobbered
(callee_abi.id (), regno, vd->e[regno].mode)))
if (vd->e[regno].mode != VOIDmode
&& callee_abi.clobbers_reg_p (vd->e[regno].mode, regno)
&& (regno < set_regno || regno >= set_regno + set_nregs))
kill_value_regno (regno, 1, vd);
/* If SET was seen in CALL_INSN_FUNCTION_USAGE, and SET_SRC
of the SET isn't in regs_invalidated_by_call hard reg set,
but instead among CLOBBERs on the CALL_INSN, we could wrongly
assume the value in it is still live. */
of the SET isn't clobbered by CALLEE_ABI, but instead among
CLOBBERs on the CALL_INSN, we could wrongly assume the
value in it is still live. */
if (ksvd.ignore_set_reg)
kill_clobbered_values (insn, vd);
}