unsigned-division-5.ll
1.8 KB
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; RUN: opt %loadPolly -polly-scops -analyze \
; RUN: -polly-invariant-load-hoisting=true < %s | FileCheck %s
;
; void f(int *A, unsigned N) {
; for (unsigned i = 0; i < N; i++)
; A[i / 3] = A[5 * N / 3];
; }
;
; CHECK: Invariant Accesses: {
; CHECK-NEXT: ReadAccess := [Reduction Type: NONE] [Scalar: 0]
; CHECK-NEXT: [N] -> { Stmt_for_body[i0] -> MemRef_A[o0] : -2 + 5N <= 3o0 <= 5N };
; CHECK-NEXT: Execution Context: [N] -> { : 0 < N <= 1844674407370955161 }
; CHECK-NEXT: }
;
; CHECK: Assumed Context:
; CHECK-NEXT: [N] -> { : }
; CHECK-NEXT: Invalid Context:
; CHECK-NEXT: [N] -> { : N >= 1844674407370955162 }
; CHECK: MustWriteAccess := [Reduction Type: NONE] [Scalar: 0]
; CHECK-NEXT: [N] -> { Stmt_for_body[i0] -> MemRef_A[o0] : -2 + i0 <= 3o0 <= i0 };
target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"
define void @f(i32* %A, i64 %N) {
entry:
br label %for.cond
for.cond: ; preds = %for.inc, %entry
%indvars.iv = phi i64 [ %indvars.iv.next, %for.inc ], [ 0, %entry ]
%exitcond = icmp ne i64 %indvars.iv, %N
br i1 %exitcond, label %for.body, label %for.end
for.body: ; preds = %for.cond
%mul = mul nsw i64 %N, 5
%div2 = udiv i64 %mul, 3
%arrayidx2 = getelementptr inbounds i32, i32* %A, i64 %div2
%load = load i32, i32* %arrayidx2, align 4
%div = udiv i64 %indvars.iv, 3
%arrayidx = getelementptr inbounds i32, i32* %A, i64 %div
store i32 %load, i32* %arrayidx, align 4
br label %for.inc
for.inc: ; preds = %for.body
%indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
br label %for.cond
for.end: ; preds = %for.cond
ret void
}