| ; RUN: opt %loadPolly -polly-optree -analyze < %s | FileCheck %s -match-full-lines |
| ; |
| ; B[j] is overwritten by at least one statement between the |
| ; definition of %val and its use. Hence, it cannot be forwarded. |
| ; |
| ; for (int j = 0; j < n; j += 1) { |
| ; bodyA: |
| ; double val = B[j]; |
| ; if (j < 1) { |
| ; bodyA_true: |
| ; B[j] = 0.0; |
| ; } |
| ; |
| ; bodyB: |
| ; A[j] = val; |
| ; } |
| ; |
| define void @func(i32 %n, double* noalias nonnull %A, double* noalias nonnull %B) { |
| entry: |
| br label %for |
| |
| for: |
| %j = phi i32 [0, %entry], [%j.inc, %inc] |
| %j.cmp = icmp slt i32 %j, %n |
| br i1 %j.cmp, label %bodyA, label %exit |
| |
| bodyA: |
| %B_idx = getelementptr inbounds double, double* %B, i32 %j |
| %val = load double, double* %B_idx |
| %cond = icmp slt i32 %j, 1 |
| br i1 %cond, label %bodyA_true, label %bodyB |
| |
| bodyA_true: |
| store double 0.0, double* %B_idx |
| br label %bodyB |
| |
| bodyB: |
| %A_idx = getelementptr inbounds double, double* %A, i32 %j |
| store double %val, double* %A_idx |
| br label %inc |
| |
| inc: |
| %j.inc = add nuw nsw i32 %j, 1 |
| br label %for |
| |
| exit: |
| br label %return |
| |
| return: |
| ret void |
| } |
| |
| |
| ; CHECK: ForwardOpTree executed, but did not modify anything |