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i386.md (mult->ashift peephole2s): Use pow2p_hwi instead of exact_log2.

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* config/i386/i386.md (mult->ashift peephole2s): Use pow2p_hwi
	instead of exact_log2.

From-SVN: r240281
This commit is contained in:
Uros Bizjak 2016-09-20 20:00:46 +02:00
parent 3c1917945d
commit ed34fc9723
2 changed files with 10 additions and 4 deletions
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10
gcc/ChangeLog
View file

@ -1,3 +1,8 @@
2016-09-20 Uros Bizjak <ubizjak@gmail.com>
* config/i386/i386.md (mult->ashift peephole2s): Use pow2p_hwi
instead of exact_log2.
2016-09-20 Uros Bizjak <ubizjak@gmail.com>
PR target/77621
@ -346,7 +351,8 @@
2016-09-14 Pat Haugen <pthaugen@us.ibm.com>
* loop-unroll.c (unroll_loop_runtime_iterations): Set probability of succ edge.
* loop-unroll.c (unroll_loop_runtime_iterations): Set probability
of succ edge.
2016-09-14 Segher Boessenkool <segher@kernel.crashing.org>
@ -446,7 +452,7 @@
2016-09-13 Tamar Christina <tamar.christina@arm.com>
* config/aarch64/aarch64-builtins.c
* config/aarch64/aarch64-builtins.c
(aarch64_init_simd_builtins): Fix builtin type signature printing.
2016-09-13 Uros Bizjak <ubizjak@gmail.com>

4
gcc/config/i386/i386.md
View file

@ -18304,7 +18304,7 @@
[(set (match_operand:SWI48 0 "register_operand")
(mult:SWI48 (match_dup 0)
(match_operand:SWI48 1 "const_int_operand")))]
"exact_log2 (INTVAL (operands[1])) >= 0
"pow2p_hwi (INTVAL (operands[1]))
&& peep2_regno_dead_p (0, FLAGS_REG)"
[(parallel [(set (match_dup 0) (ashift:SWI48 (match_dup 0) (match_dup 1)))
(clobber (reg:CC FLAGS_REG))])]
@ -18316,7 +18316,7 @@
(mult:SI (match_operand:SI 1 "register_operand")
(match_operand:SI 2 "const_int_operand"))))]
"TARGET_64BIT
&& exact_log2 (INTVAL (operands[2])) >= 0
&& pow2p_hwi (INTVAL (operands[2]))
&& REGNO (operands[0]) == REGNO (operands[1])
&& peep2_regno_dead_p (0, FLAGS_REG)"
[(parallel [(set (match_dup 0)