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| ; RUN: opt %loadPolly -polly-stmt-granularity=bb -polly-optree -analyze < %s | FileCheck %s -match-full-lines
;
; To forward %val, B[j] cannot be reused in bodyC because it is overwritten
; between. Verify that instead the alternative C[j] is used.
;
; for (int j = 0; j < n; j += 1) {
; bodyA:
; double val = B[j];
;
; bodyB:
; B[j] = 0;
; C[j] = val;
;
; bodyC:
; A[j] = val;
; }
;
define void @func(i32 %n, double* noalias nonnull %A, double* noalias nonnull %B, double* noalias nonnull %C) {
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
br label %bodyB
bodyB:
store double 0.0, double* %B_idx
%C_idx = getelementptr inbounds double, double* %C, i32 %j
store double %val, double* %C_idx
br label %bodyC
bodyC:
%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: 2
; CHECK: Operand trees forwarded: 2
; CHECK: Statements with forwarded operand trees: 2
; CHECK: }
; CHECK-NEXT: After statements {
; CHECK-NEXT: Stmt_bodyA
; CHECK-NEXT: ReadAccess := [Reduction Type: NONE] [Scalar: 0]
; CHECK-NEXT: [n] -> { Stmt_bodyA[i0] -> MemRef_B[i0] };
; CHECK-NEXT: MustWriteAccess := [Reduction Type: NONE] [Scalar: 1]
; CHECK-NEXT: [n] -> { Stmt_bodyA[i0] -> MemRef_val[] };
; CHECK-NEXT: Instructions {
; CHECK-NEXT: %val = load double, double* %B_idx
; 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[i0] };
; CHECK-NEXT: MustWriteAccess := [Reduction Type: NONE] [Scalar: 0]
; CHECK-NEXT: [n] -> { Stmt_bodyB[i0] -> MemRef_B[i0] };
; CHECK-NEXT: MustWriteAccess := [Reduction Type: NONE] [Scalar: 0]
; CHECK-NEXT: [n] -> { Stmt_bodyB[i0] -> MemRef_C[i0] };
; CHECK-NEXT: Instructions {
; CHECK-NEXT: %val = load double, double* %B_idx
; CHECK-NEXT: store double 0.000000e+00, double* %B_idx
; CHECK-NEXT: store double %val, double* %C_idx
; CHECK-NEXT: }
; CHECK-NEXT: Stmt_bodyC
; CHECK-NEXT: ReadAccess := [Reduction Type: NONE] [Scalar: 0]
; CHECK-NEXT: ;
; CHECK-NEXT: new: [n] -> { Stmt_bodyC[i0] -> MemRef_C[i0] };
; CHECK-NEXT: MustWriteAccess := [Reduction Type: NONE] [Scalar: 0]
; CHECK-NEXT: [n] -> { Stmt_bodyC[i0] -> MemRef_A[i0] };
; CHECK-NEXT: Instructions {
; CHECK-NEXT: %val = load double, double* %B_idx
; CHECK-NEXT: store double %val, double* %A_idx
; CHECK-NEXT: }
; CHECK-NEXT: }
|