2016-09-20 Uros Bizjak <ubiz...@gmail.com>
* config/i386/i386.md (mult->ashift peephole2s): Use pow2p_hwi
instead of exact_log2.
Bootstrapped and regression tested on x86_64-linux-gnu {,-m32} ,
committed to mainline SVN.
Uros.
Index: config/i386/i386.md
===================================================================
--- config/i386/i386.md (revision 240276)
+++ config/i386/i386.md (working copy)
@@ -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)
