noforward_load_conditional.ll
1.15 KB
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; RUN: opt %loadPolly -polly-optree -analyze < %s | FileCheck %s -match-full-lines
;
; B[j] is overwritten by at least one statement between the
; definition of %val and its use. Hence, it cannot be forwarded.
;
; for (int j = 0; j < n; j += 1) {
; bodyA:
; double val = B[j];
; if (j < 1) {
; bodyA_true:
; B[j] = 0.0;
; }
;
; bodyB:
; A[j] = val;
; }
;
define void @func(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 %bodyA, label %exit
bodyA:
%B_idx = getelementptr inbounds double, double* %B, i32 %j
%val = load double, double* %B_idx
%cond = icmp slt i32 %j, 1
br i1 %cond, label %bodyA_true, label %bodyB
bodyA_true:
store double 0.0, double* %B_idx
br label %bodyB
bodyB:
%A_idx = getelementptr inbounds double, double* %A, i32 %j
store double %val, double* %A_idx
br label %inc
inc:
%j.inc = add nuw nsw i32 %j, 1
br label %for
exit:
br label %return
return:
ret void
}
; CHECK: ForwardOpTree executed, but did not modify anything