noforward_sideffects.ll
850 Bytes
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; RUN: opt %loadPolly -polly-optree -analyze < %s | FileCheck %s -match-full-lines
;
; Do not forward instructions with side-effects (here: function call).
;
; for (int j = 0; j < n; j += 1) {
; bodyA:
; double val = f();
;
; bodyB:
; A[0] = val;
; }
;
declare double @f(double* %A) #1
define void @func(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 %bodyA, label %exit
bodyA:
%val = call double (double*) @f(double* %A)
br label %bodyB
bodyB:
store double %val, double* %A
br label %inc
inc:
%j.inc = add nuw nsw i32 %j, 1
br label %for
exit:
br label %return
return:
ret void
}
attributes #1 = { nounwind readnone }
; CHECK: ForwardOpTree executed, but did not modify anything