procyberian/gcc
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity Actions

Remove unnecessary md pattern for TARGET_XTHEADCONDMOV

Browse source 
There are 2 small changes in this patch, but they do not affect the result.

1. Remove unnecessary md pattern for TARGET_XTHEADCONDMOV in thead.md. The operands[4]
in "if_then_else" are always comparison operations, so the generated rtl does not match
the pattern that is expected to be deleted.

2. Change operands[4] from const0_rtx to operands[1] to maintain rtl consistency. Although
when output assembly, only operands[4] CODE will affect the output result.

Signed-off-by: Die Li <lidie@eswincomputing.com>

gcc/ChangeLog:

	* config/riscv/thead.md (*th_cond_gpr_mov<GPR:mode><GPR2:mode>): Delete.
This commit is contained in:
Die Li 2023-06-03 11:02:09 -06:00 • committed by Jeff Law
parent d42f3ad0f7
commit e1d2493f59
1 changed files with 1 additions and 14 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

15
gcc/config/riscv/thead.md
View file

@ -120,25 +120,12 @@
/* Invert the condition and take else-block. */
rtx_code code = GET_CODE (operands[4]);
code = (code == EQ) ? NE : EQ;
operands[4] = gen_rtx_fmt_ee (code, VOIDmode, const0_rtx, const0_rtx);
operands[4] = gen_rtx_fmt_ee (code, VOIDmode, operands[1], const0_rtx);
return "th.mv%C4z\t%0,%z3,%1";
}
[(set_attr "type" "condmove")
(set_attr "mode" "<GPR:MODE>")])
(define_insn "*th_cond_gpr_mov<GPR:mode><GPR2:mode>"
[(set (match_operand:GPR 0 "register_operand" "=r,r")
(if_then_else:GPR
(match_operand:GPR2 1 "register_operand" "r,r")
(match_operand:GPR 2 "reg_or_0_operand" "rJ,0")
(match_operand:GPR 3 "reg_or_0_operand" "0,rJ")))]
"TARGET_XTHEADCONDMOV"
"@
th.mvnez\t%0,%z2,%1
th.mveqz\t%0,%z3,%1"
[(set_attr "type" "condmove")
(set_attr "mode" "<GPR:MODE>")])
;; XTheadFmv
;; In RV32, we lack fmv.x.d and fmv.d.x, but XTheadFmv has instructions