reduction_looprotate_gvnpre_cond2.ll
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; RUN: opt %loadPolly -polly-stmt-granularity=bb -polly-delicm -analyze < %s | FileCheck %s -match-full-lines
;
; Load (but not store) of A[j] hoisted, reduction not written in all iterations.
; FIXME: %join is not mapped because the MemoryKind::Value mapping does not
; encompass all iterations (last iteration is unused)
;
; void func(double *A) {
; for (int j = 0; j < 2; j += 1) { /* outer */
; double phi = 0.0;
; for (int i = 0; i < 4; i += 1) { /* reduction */
; if (i != 2) {
; phi += 4.2;
; A[j] = phi;
; }
; }
; }
; }
;
define void @func(double* noalias nonnull %A) {
entry:
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:
%A_idx = getelementptr inbounds double, double* %A, i32 %j
%init = load double, double* %A_idx
br label %reduction.for
reduction.for:
%i = phi i32 [0, %reduction.preheader], [%i.inc, %reduction.inc]
%phi = phi double [%init, %reduction.preheader], [%join, %reduction.inc]
br label %body
body:
%cond = icmp ne i32 %i, 2
br i1 %cond, label %body_true, label %body_join
body_true:
%add = fadd double %phi, 4.2
store double %add, double* %A_idx
br label %body_join
body_join:
%join = phi double [%phi, %body], [%add, %body_true]
br label %reduction.inc
reduction.inc:
%i.inc = add nuw nsw i32 %i, 1
%i.cmp = icmp slt i32 %i.inc, 4
br i1 %i.cmp, label %reduction.for, label %reduction.exit
reduction.exit:
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: Overwrites mapped to: 1
; CHECK: Value scalars mapped: 1
; CHECK: PHI scalars mapped: 1
; CHECK: }
; CHECK-NEXT: After accesses {
; CHECK-NEXT: Stmt_reduction_preheader
; CHECK-NEXT: ReadAccess := [Reduction Type: NONE] [Scalar: 0]
; CHECK-NEXT: { Stmt_reduction_preheader[i0] -> MemRef_A[i0] };
; CHECK-NEXT: MustWriteAccess := [Reduction Type: NONE] [Scalar: 1]
; CHECK-NEXT: { Stmt_reduction_preheader[i0] -> MemRef_phi__phi[] };
; CHECK-NEXT: new: { Stmt_reduction_preheader[i0] -> MemRef_A[i0] };
; CHECK-NEXT: Stmt_reduction_for
; CHECK-NEXT: ReadAccess := [Reduction Type: NONE] [Scalar: 1]
; CHECK-NEXT: { Stmt_reduction_for[i0, i1] -> MemRef_phi__phi[] };
; CHECK-NEXT: new: { Stmt_reduction_for[i0, i1] -> MemRef_A[i0] };
; CHECK-NEXT: MustWriteAccess := [Reduction Type: NONE] [Scalar: 1]
; CHECK-NEXT: { Stmt_reduction_for[i0, i1] -> MemRef_phi[] };
; CHECK-NEXT: new: { Stmt_reduction_for[i0, i1] -> MemRef_A[i0] };
; CHECK-NEXT: Stmt_body
; CHECK-NEXT: ReadAccess := [Reduction Type: NONE] [Scalar: 1]
; CHECK-NEXT: { Stmt_body[i0, i1] -> MemRef_phi[] };
; CHECK-NEXT: new: { Stmt_body[i0, i1] -> MemRef_A[i0] };
; CHECK-NEXT: MustWriteAccess := [Reduction Type: NONE] [Scalar: 1]
; CHECK-NEXT: { Stmt_body[i0, i1] -> MemRef_join__phi[] };
; CHECK-NEXT: Stmt_body_true
; CHECK-NEXT: ReadAccess := [Reduction Type: NONE] [Scalar: 1]
; CHECK-NEXT: { Stmt_body_true[i0, i1] -> MemRef_phi[] };
; CHECK-NEXT: new: { Stmt_body_true[i0, i1] -> MemRef_A[i0] : i1 <= 1; Stmt_body_true[i0, 3] -> MemRef_A[i0] };
; CHECK-NEXT: MustWriteAccess := [Reduction Type: NONE] [Scalar: 0]
; CHECK-NEXT: { Stmt_body_true[i0, i1] -> MemRef_A[i0] };
; CHECK-NEXT: MustWriteAccess := [Reduction Type: NONE] [Scalar: 1]
; CHECK-NEXT: { Stmt_body_true[i0, i1] -> MemRef_join__phi[] };
; CHECK-NEXT: Stmt_body_join
; CHECK-NEXT: MustWriteAccess := [Reduction Type: NONE] [Scalar: 1]
; CHECK-NEXT: { Stmt_body_join[i0, i1] -> MemRef_join[] };
; CHECK-NEXT: ReadAccess := [Reduction Type: NONE] [Scalar: 1]
; CHECK-NEXT: { Stmt_body_join[i0, i1] -> MemRef_join__phi[] };
; CHECK-NEXT: Stmt_reduction_inc
; CHECK-NEXT: ReadAccess := [Reduction Type: NONE] [Scalar: 1]
; CHECK-NEXT: { Stmt_reduction_inc[i0, i1] -> MemRef_join[] };
; CHECK-NEXT: MustWriteAccess := [Reduction Type: NONE] [Scalar: 1]
; CHECK-NEXT: { Stmt_reduction_inc[i0, i1] -> MemRef_phi__phi[] };
; CHECK-NEXT: new: { Stmt_reduction_inc[i0, i1] -> MemRef_A[i0] : i1 <= 2 };
; CHECK-NEXT: }