| Message ID | 4DA407D6.6@linaro.org |
|---|---|
| State | Accepted |
| Headers | show |
Index: gcc/config/arm/arm.md =================================================================== --- gcc/config/arm/arm.md (revision 172252) +++ gcc/config/arm/arm.md (working copy) @@ -3554,7 +3554,7 @@ ;; The constraints here are to prevent a *partial* overlap (where %Q0 == %R1). ;; The first alternative allows the common case of a *full* overlap. (define_insn "*arm_negdi2" - [(set (match_operand:DI 0 "s_register_operand" "=&r,r") + [(set (match_operand:DI 0 "s_register_operand" "=r,&r") (neg:DI (match_operand:DI 1 "s_register_operand" "0,r"))) (clobber (reg:CC CC_REGNUM))]
Hi, This should fix PR48090 and should be applied to all release branches. The first alternative doesn't need an early clobber since it is tied to operand 0 - the second alternative however does need one. This is a bug that manifests itself with a particular set of command line options and it is interesting to note that this hasn't been caught in such a long time. Testing in progress . Ok to commit to all release branches ? cheers Ramana 2011-04-11 Ramana Radhakrishnan <ramana.radhakrishnan@linaro.org> PR target/48090 * config/arm/arm.md (*arm_negdi2): Fix early clobber constraints. "TARGET_ARM"