overwritten_scalar.ll
1.22 KB
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; RUN: opt %loadPolly -polly-import-jscop -polly-import-jscop-postfix=transformed -polly-simplify -analyze < %s | FileCheck -match-full-lines %s
;
; Remove identical writes
; (two stores in the same statement that write the same value to the same
; destination)
;
; for (int j = 0; j < n; j += 1) {
; body:
; val = 21.0 + 21.0;
; A[1] = val;
; A[1] = val;
;
; user:
; A[0] = A[1];
; }
;
define void @overwritten_scalar(i32 %n, double* noalias nonnull %A) {
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:
%val = fadd double 21.0, 21.0
br label %user
user:
%phi = phi double [%val, %body]
%add = fadd double %val, %phi
store double %add, double* %A
br label %inc
inc:
%j.inc = add nuw nsw i32 %j, 1
br label %for
exit:
br label %return
return:
ret void
}
; CHECK: Statistics {
; CHECK: Overwrites removed: 1
; CHECK: }
; CHECK: Stmt_body
; CHECK-NEXT: MustWriteAccess := [Reduction Type: NONE] [Scalar: 1]
; CHECK-NEXT: [n] -> { Stmt_body[i0] -> MemRef_val[] };
; CHECK-NEXT: new: [n] -> { Stmt_body[i0] -> MemRef_A[1] };
; CHECK-NEXT: Stmt_user