[arm] Implement negscc using SBC when appropriate.

[thirdparty/gcc.git] / gcc / config / arm / thumb2.md

diff --git a/gcc/config/arm/thumb2.md b/gcc/config/arm/thumb2.md
index 6ccc875e2b4e7b8ce256e52da966dfe220c6f5d6..8d0b6be920518e891c1d3a88274b70395a44a124 100644 (file)
--- a/gcc/config/arm/thumb2.md
+++ b/gcc/config/arm/thumb2.md
@@ -368,7 +368,9 @@
   [(set (match_operand:SI 0 "s_register_operand" "=r")
        (neg:SI (match_operator:SI 1 "arm_comparison_operator_mode"
                 [(match_operand 2 "cc_register" "") (const_int 0)])))]
-  "TARGET_THUMB2 && !arm_restrict_it"
+  "TARGET_THUMB2
+   && !arm_restrict_it
+   && !arm_borrow_operation (operands[1], SImode)"
   "#"   ; "ite\\t%D1\;mov%D1\\t%0, #0\;mvn%d1\\t%0, #0"
   "&& true"
   [(set (match_dup 0)
@@ -387,7 +389,9 @@
   [(set (match_operand:SI 0 "low_register_operand" "=l")
        (neg:SI (match_operator:SI 1 "arm_comparison_operator_mode"
                 [(match_operand 2 "cc_register" "") (const_int 0)])))]
-  "TARGET_THUMB2 && arm_restrict_it"
+  "TARGET_THUMB2
+   && arm_restrict_it
+   && !arm_borrow_operation (operands[1], SImode)"
   "#"   ; ";mvn\\t%0, #0 ;it\\t%D1\;mov%D1\\t%0, #0\"
   "&& reload_completed"
   [(set (match_dup 0)