47 lines
857 B
LLVM
47 lines
857 B
LLVM
; RUN: opt %loadPolly -polly-simplify -analyze < %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
|