forked from OSchip/llvm-project
39 lines
1.1 KiB
LLVM
39 lines
1.1 KiB
LLVM
; RUN: opt -loop-accesses -analyze < %s | FileCheck %s
|
|
|
|
; Handle memchecks involving loop-invariant addresses:
|
|
;
|
|
; extern int *A, *b;
|
|
; for (i = 0; i < N; ++i) {
|
|
; A[i] = b;
|
|
; }
|
|
|
|
target datalayout = "e-m:o-i64:64-f80:128-n8:16:32:64-S128"
|
|
|
|
; CHECK: Memory dependences are safe with run-time checks
|
|
; CHECK: Run-time memory checks:
|
|
; CHECK-NEXT: Check 0:
|
|
; CHECK-NEXT: Comparing group ({{.*}}):
|
|
; CHECK-NEXT: %arrayidxA = getelementptr inbounds i32, i32* %a, i64 %ind
|
|
; CHECK-NEXT: Against group ({{.*}}):
|
|
; CHECK-NEXT: i32* %b
|
|
|
|
define void @f(i32* %a, i32* %b) {
|
|
entry:
|
|
br label %for.body
|
|
|
|
for.body: ; preds = %for.body, %entry
|
|
%ind = phi i64 [ 0, %entry ], [ %inc, %for.body ]
|
|
|
|
%arrayidxA = getelementptr inbounds i32, i32* %a, i64 %ind
|
|
|
|
%loadB = load i32, i32* %b, align 4
|
|
store i32 %loadB, i32* %arrayidxA, align 4
|
|
|
|
%inc = add nuw nsw i64 %ind, 1
|
|
%exitcond = icmp eq i64 %inc, 20
|
|
br i1 %exitcond, label %for.end, label %for.body
|
|
|
|
for.end: ; preds = %for.body
|
|
ret void
|
|
}
|