reduction_looprotate_undef.ll
3.82 KB
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; RUN: opt %loadPolly -polly-stmt-granularity=bb -polly-flatten-schedule -polly-delicm-overapproximate-writes=true -polly-delicm-compute-known=true -polly-delicm -analyze < %s | FileCheck %s
;
; void func(int *A) {
; for (int j = 0; j < 2; j += 1) { /* outer */
; int phi;
; for (int i = 0; i < 4; i += 1) /* reduction */
; phi += 42;
; A[j] = phi;
; }
; }
;
define void @func(i32* 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:
br label %reduction.for
reduction.for:
%i = phi i32 [0, %reduction.preheader], [%i.inc, %reduction.inc]
%phi = phi i32 [undef, %reduction.preheader], [%conv, %reduction.inc]
br label %body
body:
%fval = sitofp i32 %phi to double
%add = fadd double %fval, 4.2
%conv = fptosi double %add to i32
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:
%A_idx = getelementptr inbounds i32, i32* %A, i32 %j
store i32 %conv, i32* %A_idx
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: After accesses {
; CHECK-NEXT: Stmt_reduction_preheader
; 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: MustWriteAccess := [Reduction Type: NONE] [Scalar: 1]
; CHECK-NEXT: { Stmt_body[i0, i1] -> MemRef_conv[] };
; CHECK-NEXT: new: { Stmt_body[i0, i1] -> MemRef_A[i0] };
; 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] : 3i1 <= 22 - 14i0; Stmt_body[1, 3] -> MemRef_A[1] };
; CHECK-NEXT: Stmt_reduction_inc
; CHECK-NEXT: ReadAccess := [Reduction Type: NONE] [Scalar: 1]
; CHECK-NEXT: { Stmt_reduction_inc[i0, i1] -> MemRef_conv[] };
; CHECK-NEXT: new: { Stmt_reduction_inc[i0, i1] -> MemRef_A[i0] : 3i1 <= 22 - 14i0; Stmt_reduction_inc[1, 3] -> MemRef_A[1] };
; 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] };
; CHECK-NEXT: Stmt_reduction_exit
; CHECK-NEXT: MustWriteAccess := [Reduction Type: NONE] [Scalar: 0]
; CHECK-NEXT: { Stmt_reduction_exit[i0] -> MemRef_A[i0] };
; CHECK-NEXT: ReadAccess := [Reduction Type: NONE] [Scalar: 1]
; CHECK-NEXT: { Stmt_reduction_exit[i0] -> MemRef_conv[] };
; CHECK-NEXT: new: { Stmt_reduction_exit[i0] -> MemRef_A[i0] };
; CHECK-NEXT: }