(divsi3): Fix divide by 2^N with compare RTL.

From-SVN: r7498

diff --git a/gcc/config/rs6000/rs6000.md b/gcc/config/rs6000/rs6000.md
index 3bff980..ee9b8d6 100644 (file)
--- a/gcc/config/rs6000/rs6000.md
+++ b/gcc/config/rs6000/rs6000.md
@@ -1254,8 +1254,9 @@
 
 (define_insn ""
   [(set (match_operand:CC 0 "cc_reg_operand" "=x")
-       (div:SI (match_operand:SI 1 "gpc_reg_operand" "r")
-               (match_operand:SI 2 "const_int_operand" "N")))
+       (compare:CC (div:SI (match_operand:SI 1 "gpc_reg_operand" "r")
+                           (match_operand:SI 2 "const_int_operand" "N"))
+                   (const_int 0)))
    (clobber (match_scratch:SI 3 "=r"))]
   "exact_log2 (INTVAL (operands[2])) >= 0"
   "{srai|srawi} %3,%1,%p2\;{aze.|addze.} %3,%3"
@@ -1264,8 +1265,9 @@
 
 (define_insn ""
   [(set (match_operand:CC 3 "cc_reg_operand" "=x")
-       (div:SI (match_operand:SI 1 "gpc_reg_operand" "r")
-               (match_operand:SI 2 "const_int_operand" "N")))
+       (compare:CC (div:SI (match_operand:SI 1 "gpc_reg_operand" "r")
+                           (match_operand:SI 2 "const_int_operand" "N"))
+                   (const_int 0)))
    (set (match_operand:SI 0 "gpc_reg_operand" "=r")
        (div:SI (match_dup 1) (match_dup 2)))]
   "exact_log2 (INTVAL (operands[2])) >= 0"