| ; RUN: opt %loadPolly -polly-delicm -analyze < %s | FileCheck %s |
| ; |
| ; void func(double *A) { |
| ; fsomeval = 21.0 + 21.0; |
| ; for (int j = 0; j < 2; j += 1) { /* outer */ |
| ; double phi = 0.0; |
| ; for (int i = 0; i < 4; i += 1) /* reduction */ |
| ; phi += 4.2; |
| ; A[j] = fsomeval; |
| ; } |
| ; } |
| ; |
| ; Check that fsomeval is not mapped to A[j] because it is read-only. |
| ; There is no advantage in mapping values not modified within the SCoP. |
| ; |
| define void @func(double* noalias nonnull %A) { |
| entry: |
| %fsomeval = fadd double 21.0, 21.0 |
| 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] |
| %phi = phi double [0.0, %reduction.preheader], [%add, %reduction.inc] |
| %i.cmp = icmp slt i32 %i, 4 |
| br i1 %i.cmp, label %body, label %reduction.exit |
| |
| |
| |
| body: |
| %add = fadd double %phi, 4.2 |
| 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 |
| store double %fsomeval, 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: } |
| ; CHECK: No modification has been made |
