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msp430.md (ashlhi3): Optimize one bit shifts.

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* config/msp430/msp430.md (ashlhi3): Optimize one bit shifts.
	(ashrhi3): Likewise.
	(lshrhi3): Likewise.

From-SVN: r235410
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DJ Delorie 2016-04-25 07:59:44 -04:00 • committed by Nick Clifton
parent 2de1cf8c4b
commit 9c8a71e668
2 changed files with 15 additions and 0 deletions
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6
gcc/ChangeLog
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@ -1,3 +1,9 @@
2016-04-25 DJ Delorie <dj@redhat.com>
* config/msp430/msp430.md (ashlhi3): Optimize one bit shifts.
(ashrhi3): Likewise.
(lshrhi3): Likewise.
2016-04-25 Richard Biener <rguenther@suse.de>
PR tree-optimization/70780

9
gcc/config/msp430/msp430.md
View file

@ -756,6 +756,9 @@
&& REG_P (operands[1])
&& CONST_INT_P (operands[2]))
emit_insn (gen_430x_shift_left (operands[0], operands[1], operands[2]));
else if (CONST_INT_P (operands[2])
&& INTVAL (operands[2]) == 1)
emit_insn (gen_slli_1 (operands[0], operands[1]));
else
msp430_expand_helper (operands, \"__mspabi_slli\", true);
DONE;
@ -825,6 +828,9 @@
&& REG_P (operands[1])
&& CONST_INT_P (operands[2]))
emit_insn (gen_430x_arithmetic_shift_right (operands[0], operands[1], operands[2]));
else if (CONST_INT_P (operands[2])
&& INTVAL (operands[2]) == 1)
emit_insn (gen_srai_1 (operands[0], operands[1]));
else
msp430_expand_helper (operands, \"__mspabi_srai\", true);
DONE;
@ -910,6 +916,9 @@
&& REG_P (operands[1])
&& CONST_INT_P (operands[2]))
emit_insn (gen_430x_logical_shift_right (operands[0], operands[1], operands[2]));
else if (CONST_INT_P (operands[2])
&& INTVAL (operands[2]) == 1)
emit_insn (gen_srli_1 (operands[0], operands[1]));
else
msp430_expand_helper (operands, \"__mspabi_srli\", true);
DONE;