llvm-project/polly/test/ForwardOpTree/forward_store.ll

; RUN: opt %loadPolly -polly-print-optree -disable-output < %s | FileCheck %s -match-full-lines
;
; Rematerialize a load.
;
; for (int j = 0; j < n; j += 1) {
; bodyA:
;   double val = B[j];
;
; bodyB:
;   A[j] = val;
; }
;

declare double @f() #0

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:
      %val = call double @f()
      %A_idx = getelementptr inbounds double, double* %A, i32 %j
      store double %val, double* %A_idx
      br label %bodyB

    bodyB:
      %B_idx = getelementptr inbounds double, double* %B, i32 %j
      store double %val, double* %B_idx
      br label %inc

inc:
  %j.inc = add nuw nsw i32 %j, 1
  br label %for

exit:
  br label %return

return:
  ret void
}

attributes #0 = { nounwind readnone }


; CHECK: Statistics {
; CHECK:     Reloads: 1
; CHECK: }

; CHECK:      After statements {
; CHECK-NEXT:     Stmt_bodyA
; CHECK-NEXT:             MustWriteAccess :=  [Reduction Type: NONE] [Scalar: 0]
; CHECK-NEXT:                 [n] -> { Stmt_bodyA[i0] -> MemRef_A[i0] };
; CHECK-NEXT:             MustWriteAccess :=  [Reduction Type: NONE] [Scalar: 1]
; CHECK-NEXT:                 [n] -> { Stmt_bodyA[i0] -> MemRef_val[] };
; CHECK-NEXT:             Instructions {
; CHECK-NEXT:                   %val = call double @f()
; CHECK-NEXT:                   store double %val, double* %A_idx, align 8
; CHECK-NEXT:             }
; CHECK-NEXT:     Stmt_bodyB
; CHECK-NEXT:             MustWriteAccess :=  [Reduction Type: NONE] [Scalar: 0]
; CHECK-NEXT:                 [n] -> { Stmt_bodyB[i0] -> MemRef_B[i0] };
; CHECK-NEXT:             ReadAccess :=       [Reduction Type: NONE] [Scalar: 1]
; CHECK-NEXT:                 [n] -> { Stmt_bodyB[i0] -> MemRef_val[] };
; CHECK-NEXT:            new: [n] -> { Stmt_bodyB[i0] -> MemRef_A[i0] };
; CHECK-NEXT:             Instructions {
; CHECK-NEXT:                   store double %val, double* %B_idx, align 8
; CHECK-NEXT:             }
; CHECK-NEXT: }