bool DeadMachineInstructionElim::isDead(const MachineInstr *MI) const {
// Don't delete instructions with side effects.
bool SawStore = false;
- if (!MI->isSafeToMove(TII, SawStore, 0))
+ if (!MI->isSafeToMove(TII, SawStore, 0) && !MI->isPHI())
return false;
// Examine each operand.
br label %phi1.exit
phi1.exit: ; preds = %bb.i35, %bb142
- %.pn = phi double [ %6, %bb.i35 ], [ 0.000000e+00, %bb142 ] ; <double> [#uses=0]
+ %.pn = phi double [ %6, %bb.i35 ], [ 0.000000e+00, %bb142 ] ; <double> [#uses=1]
%9 = phi double [ %8, %bb.i35 ], [ 0.000000e+00, %bb142 ] ; <double> [#uses=1]
- %10 = fmul double undef, %9 ; <double> [#uses=0]
+ %10 = fmul double %.pn, %9 ; <double> [#uses=1]
br i1 %14, label %phi0.exit, label %bb.i
bb.i: ; preds = %phi1.exit
unreachable
phi0.exit: ; preds = %phi1.exit
- %11 = fsub double %4, undef ; <double> [#uses=1]
+ %11 = fsub double %4, %10 ; <double> [#uses=1]
%12 = fadd double 0.000000e+00, %11 ; <double> [#uses=1]
store double %12, double* undef, align 4
br label %bb142
bb107.i.i: ; preds = %bb107.i.i, %bb.i6.i
%q_addr.0.i.i.in = phi %struct.bnode** [ null, %bb107.i.i ], [ %4, %bb.i6.i ] ; <%struct.bnode**> [#uses=1]
- %q_addr.0.i.i = load %struct.bnode** %q_addr.0.i.i.in ; <%struct.bnode*> [#uses=0]
+ %q_addr.0.i.i = load %struct.bnode** %q_addr.0.i.i.in ; <%struct.bnode*> [#uses=1]
+ %q_addr.1 = getelementptr %struct.anon* %0, i32 0, i32 4, i32 1
+ store %struct.bnode* %q_addr.0.i.i, %struct.bnode** %q_addr.1, align 4
br label %bb107.i.i
bb47.loopexit.i: ; preds = %bb32.i