; RUN: opt %loadPolly -polly-delicm -analyze < %s | FileCheck %s ; ; void func(double *A) { ; for (int j = 0; j < 2; j += 1) { /* outer */ ; double phi1 = 0.0, phi2 = 0.0; ; for (int i = 0; i < 4; i += 1) { /* reduction */ ; phi1 += 4.2; ; phi2 += 29.0; ; } ; A[j] = phi1 + phi2; ; } ; } ; ; Check that we cannot map both, %phi1 and %phi2 to A[j] (conflict). ; Note that it is undefined which one will be mapped. We keep the test ; symmetric so it passes if either one is mapped. ; define void @func(double* noalias nonnull %A) { entry: br label %outer.preheader outer.preheader: br label %outer.for outer.for: %j = phi i32 [0, %outer.preheader], [%j.inc, %outer.inc] %j.cmp = icmp slt i32 %j, 2 br i1 %j.cmp, label %reduction.preheader, label %outer.exit reduction.preheader: br label %reduction.for reduction.for: %i = phi i32 [0, %reduction.preheader], [%i.inc, %reduction.inc] %phi1 = phi double [0.0, %reduction.preheader], [%add1, %reduction.inc] %phi2 = phi double [0.0, %reduction.preheader], [%add2, %reduction.inc] %i.cmp = icmp slt i32 %i, 4 br i1 %i.cmp, label %body, label %reduction.exit body: %add1 = fadd double %phi1, 4.2 %add2 = fadd double %phi2, 29.0 br label %reduction.inc reduction.inc: %i.inc = add nuw nsw i32 %i, 1 br label %reduction.for reduction.exit: %A_idx = getelementptr inbounds double, double* %A, i32 %j %sum = fadd double %phi1, %phi2 store double %sum, double* %A_idx br label %outer.inc outer.inc: %j.inc = add nuw nsw i32 %j, 1 br label %outer.for outer.exit: br label %return return: ret void } ; CHECK: Statistics { ; CHECK: Compatible overwrites: 1 ; CHECK: Overwrites mapped to: 1 ; CHECK: Value scalars mapped: 2 ; CHECK: PHI scalars mapped: 1 ; CHECK: }