overwritten_loadbetween.ll
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; RUN: opt %loadPolly -polly-simplify -analyze < %s | FileCheck -match-full-lines %s
; RUN: opt %loadPolly "-passes=scop(print<polly-simplify>)" -disable-output -aa-pipeline=basic-aa < %s | FileCheck -match-full-lines %s
;
; Do not remove overwrites when the value is read before.
;
; for (int j = 0; j < n; j += 1) {
;body:
; A[0] = 21.0;
; val = A[0];
; A[0] = 42.0;
;
;user:
; B[0] = val;
; }
;
define void @overwritten(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 %body, label %exit
body:
store double 21.0, double* %A
%val = load double, double* %A
store double 42.0, double* %A
br label %user
user:
store double %val, double* %B
br label %inc
inc:
%j.inc = add nuw nsw i32 %j, 1
br label %for
exit:
br label %return
return:
ret void
}
; CHECK: SCoP could not be simplified