continue;
// Check if I is induction variable increment instruction.
- if (!IndVarIncrement && I->getOpcode() == Instruction::Add) {
+ if (I->getOpcode() == Instruction::Add) {
Value *Op0 = I->getOperand(0);
Value *Op1 = I->getOperand(1);
if ((PN = dyn_cast<PHINode>(Op0))) {
if ((CI = dyn_cast<ConstantInt>(Op1)))
- IndVarIncrement = I;
+ if (CI->isOne()) {
+ if (!IndVarIncrement && PN == IndVar)
+ IndVarIncrement = I;
+ // else this is another loop induction variable
+ continue;
+ }
} else
if ((PN = dyn_cast<PHINode>(Op1))) {
if ((CI = dyn_cast<ConstantInt>(Op0)))
- IndVarIncrement = I;
+ if (CI->isOne()) {
+ if (!IndVarIncrement && PN == IndVar)
+ IndVarIncrement = I;
+ // else this is another loop induction variable
+ continue;
+ }
}
-
- if (IndVarIncrement && PN == IndVar && CI->isOne())
- continue;
- }
+ }
// I is an Exit condition if next instruction is block terminator.
// Exit condition is OK if it compares loop invariant exit value,
--- /dev/null
+; PR714
+; Update loop iteraton space to eliminate condition inside loop.
+; RUN: llvm-as < %s | opt -loop-index-split | llvm-dis | not grep bothcond
+define void @test(float* %x, i32 %ndat, float** %y, float %xcen, i32 %xmin, i32 %xmax, float %sigmal, float %contribution) {
+entry:
+ %tmp5310 = icmp sgt i32 %xmin, %xmax ; <i1> [#uses=1]
+ br i1 %tmp5310, label %return, label %bb.preheader
+
+bb.preheader: ; preds = %entry
+ %tmp3031 = fpext float %contribution to double ; <double> [#uses=1]
+ %tmp32 = mul double %tmp3031, 5.000000e-01 ; <double> [#uses=1]
+ %tmp3839 = fpext float %sigmal to double ; <double> [#uses=1]
+ br label %bb
+
+bb: ; preds = %bb.preheader, %cond_next45
+ %i.01.0 = phi i32 [ %tmp47, %cond_next45 ], [ %xmin, %bb.preheader ] ; <i32> [#uses=4]
+ %k.06.0 = phi i32 [ %tmp49, %cond_next45 ], [ 0, %bb.preheader ] ; <i32> [#uses=3]
+ %tmp2 = icmp sgt i32 %i.01.0, -1 ; <i1> [#uses=1]
+ %tmp6 = icmp slt i32 %i.01.0, %ndat ; <i1> [#uses=1]
+ %bothcond = and i1 %tmp2, %tmp6 ; <i1> [#uses=1]
+ br i1 %bothcond, label %cond_true9, label %cond_next45
+
+cond_true9: ; preds = %bb
+ %tmp12 = getelementptr float* %x, i32 %i.01.0 ; <float*> [#uses=1]
+ %tmp13 = load float* %tmp12, align 4 ; <float> [#uses=1]
+ %tmp15 = sub float %xcen, %tmp13 ; <float> [#uses=1]
+ %tmp16 = tail call float @fabsf( float %tmp15 ) ; <float> [#uses=1]
+ %tmp18 = fdiv float %tmp16, %sigmal ; <float> [#uses=1]
+ %tmp21 = load float** %y, align 4 ; <float*> [#uses=2]
+ %tmp27 = getelementptr float* %tmp21, i32 %k.06.0 ; <float*> [#uses=1]
+ %tmp28 = load float* %tmp27, align 4 ; <float> [#uses=1]
+ %tmp2829 = fpext float %tmp28 to double ; <double> [#uses=1]
+ %tmp34 = sub float -0.000000e+00, %tmp18 ; <float> [#uses=1]
+ %tmp3435 = fpext float %tmp34 to double ; <double> [#uses=1]
+ %tmp36 = tail call double @exp( double %tmp3435 ) ; <double> [#uses=1]
+ %tmp37 = mul double %tmp32, %tmp36 ; <double> [#uses=1]
+ %tmp40 = fdiv double %tmp37, %tmp3839 ; <double> [#uses=1]
+ %tmp41 = add double %tmp2829, %tmp40 ; <double> [#uses=1]
+ %tmp4142 = fptrunc double %tmp41 to float ; <float> [#uses=1]
+ %tmp44 = getelementptr float* %tmp21, i32 %k.06.0 ; <float*> [#uses=1]
+ store float %tmp4142, float* %tmp44, align 4
+ br label %cond_next45
+
+cond_next45: ; preds = %bb, %cond_true9
+ %tmp47 = add i32 %i.01.0, 1 ; <i32> [#uses=2]
+ %tmp49 = add i32 %k.06.0, 1 ; <i32> [#uses=1]
+ %tmp53 = icmp sgt i32 %tmp47, %xmax ; <i1> [#uses=1]
+ br i1 %tmp53, label %return.loopexit, label %bb
+
+return.loopexit: ; preds = %cond_next45
+ br label %return
+
+return: ; preds = %return.loopexit, %entry
+ ret void
+}
+
+declare float @fabsf(float)
+
+declare double @exp(double)