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|
; RUN: opt %loadPolly -polly-optree -analyze < %s | FileCheck %s -match-full-lines
;
; Rematerialize a load in the presence of a non-store WRITE access.
;
; for (int j = 0; j < n; j += 1) {
; bodyA:
; memset(A, 0, 16);
; memset(B, 0, 16);
;
; bodyB:
; double val = B[j];
;
; bodyC:
; A[j] = val;
; }
;
declare void @llvm.memset.p0f64.i64(double* nocapture, i8, i64, i32, i1)
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:
call void @llvm.memset.p0f64.i64(double* %A, i8 0, i64 16, i32 1, i1 false)
call void @llvm.memset.p0f64.i64(double* %B, i8 0, i64 16, i32 1, i1 false)
br label %bodyB
bodyB:
%B_idx = getelementptr inbounds double, double* %B, i32 %j
%val = load double, double* %B_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: 1
; CHECK: Operand trees forwarded: 1
; CHECK: Statements with forwarded operand trees: 1
; CHECK: }
; CHECK-NEXT: After statements {
; CHECK: Stmt_bodyB
; CHECK-NEXT: ReadAccess := [Reduction Type: NONE] [Scalar: 0]
; CHECK-NEXT: [n] -> { Stmt_bodyB[i0] -> MemRef_B[o0] : 8i0 <= o0 <= 7 + 8i0 };
; CHECK-NEXT: MustWriteAccess := [Reduction Type: NONE] [Scalar: 1]
; CHECK-NEXT: [n] -> { Stmt_bodyB[i0] -> MemRef_val[] };
; CHECK-NEXT: Instructions {
; CHECK-NEXT: %val = load double, double* %B_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_B[8i0] };
; CHECK-NEXT: MustWriteAccess := [Reduction Type: NONE] [Scalar: 0]
; CHECK-NEXT: [n] -> { Stmt_bodyC[i0] -> MemRef_A[o0] : 8i0 <= o0 <= 7 + 8i0 };
; CHECK-NEXT: Instructions {
; CHECK-NEXT: %val = load double, double* %B_idx
; CHECK-NEXT: store double %val, double* %A_idx
; CHECK-NEXT: }
; CHECK-NEXT: }
|
