Message ID | 4DA407D6.6@linaro.org |
---|---|
State | New |
Headers | show |
On Tue, 2011-04-12 at 09:05 +0100, Ramana Radhakrishnan wrote: > 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. > OK everywhere. R.
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))]