| ; RUN: opt %loadPolly -polly-stmt-granularity=bb -polly-optree -analyze < %s | FileCheck %s -match-full-lines |
| ; |
| ; Forward a the LoadInst %val into %bodyB. %val is executed multiple times, |
| ; we must get the last loaded values. |
| ; |
| ; for (int j = 0; j < n; j += 1) { |
| ; double val; |
| ; for (int i = 0; i < n; i += 1) { |
| ; bodyA: |
| ; val = B[j]; |
| ; } |
| ; |
| ; 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 sle i32 %j, %n |
| br i1 %j.cmp, label %bodyA, label %exit |
| |
| bodyA: |
| %i = phi i32 [0, %for], [%i.inc, %bodyA] |
| %B_idx = getelementptr inbounds double, double* %B, i32 %i |
| %val = load double, double* %B_idx |
| %i.inc = add nuw nsw i32 %i, 1 |
| %i.cmp = icmp slt i32 %i, %n |
| br i1 %i.cmp, label %bodyA, 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: Statistics { |
| ; CHECK: Known loads forwarded: 1 |
| ; CHECK: Operand trees forwarded: 1 |
| ; CHECK: Statements with forwarded operand trees: 1 |
| ; CHECK: } |
| |
| ; CHECK: After statements { |
| ; CHECK-NEXT: Stmt_bodyA |
| ; CHECK-NEXT: ReadAccess := [Reduction Type: NONE] [Scalar: 0] |
| ; CHECK-NEXT: [n] -> { Stmt_bodyA[i0, i1] -> MemRef_B[i1] }; |
| ; CHECK-NEXT: MustWriteAccess := [Reduction Type: NONE] [Scalar: 1] |
| ; CHECK-NEXT: [n] -> { Stmt_bodyA[i0, i1] -> MemRef_val[] }; |
| ; CHECK-NEXT: Instructions { |
| ; CHECK-NEXT: %val = load double, double* %B_idx, align 8 |
| ; CHECK-NEXT: %i.cmp = icmp slt i32 %i, %n |
| ; CHECK-NEXT: } |
| ; CHECK-NEXT: Stmt_bodyB |
| ; CHECK-NEXT: ReadAccess := [Reduction Type: NONE] [Scalar: 0] |
| ; CHECK-NEXT: ; |
| ; CHECK-NEXT: new: [n] -> { Stmt_bodyB[i0] -> MemRef_B[n] }; |
| ; CHECK-NEXT: MustWriteAccess := [Reduction Type: NONE] [Scalar: 0] |
| ; CHECK-NEXT: [n] -> { Stmt_bodyB[i0] -> MemRef_A[i0] }; |
| ; CHECK-NEXT: Instructions { |
| ; CHECK-NEXT: %val = load double, double* %B_idx, align 8 |
| ; CHECK-NEXT: store double %val, double* %A_idx, align 8 |
| ; CHECK-NEXT: } |
| ; CHECK-NEXT: } |