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| ; RUN: opt < %s -basicaa -loop-interchange -verify-dom-info -verify-loop-info \
; RUN: -S -pass-remarks=loop-interchange 2>&1 | FileCheck %s
@A10 = local_unnamed_addr global [3 x [3 x i32]] zeroinitializer, align 16
;; Test to make sure we can handle zext instructions introduced by
;; IndVarSimplify.
;;
;; for (int i = 0; i < 2; ++i)
;; for(int j = 0; j < n; ++j) {
;; A[j][i] = i;
;; }
; CHECK: Loop interchanged with enclosing loop.
@A11 = local_unnamed_addr global [3 x [3 x i32]] zeroinitializer, align 16
define void @interchange_11(i32 %n) {
entry:
br label %for.cond1.preheader
for.cond.loopexit: ; preds = %for.body4
%exitcond28 = icmp ne i64 %indvars.iv.next27, 2
br i1 %exitcond28, label %for.cond1.preheader, label %for.cond.cleanup
for.cond1.preheader: ; preds = %for.cond.loopexit, %entry
%indvars.iv26 = phi i64 [ 0, %entry ], [ %indvars.iv.next27, %for.cond.loopexit ]
%indvars.iv.next27 = add nuw nsw i64 %indvars.iv26, 1
br label %for.body4
for.cond.cleanup: ; preds = %for.cond.loopexit
ret void
for.body4: ; preds = %for.body4, %for.cond1.preheader
%indvars.iv = phi i64 [ 0, %for.cond1.preheader ], [ %indvars.iv.next, %for.body4 ]
; The store below does not appear in the C snippet above.
; With two stores in the loop there may be WAW dependences, and interchange is illegal.
; %arrayidx6 = getelementptr inbounds [3 x [3 x i32]], [3 x [3 x i32]]* @A10, i64 0, i64 %indvars.iv, i64 %indvars.iv26
; %tmp = trunc i64 %indvars.iv26 to i32
; store i32 %tmp, i32* %arrayidx6, align 4
%arrayidx10 = getelementptr inbounds [3 x [3 x i32]], [3 x [3 x i32]]* @A10, i64 0, i64 %indvars.iv, i64 %indvars.iv.next27
%tmp1 = trunc i64 %indvars.iv to i32
store i32 %tmp1, i32* %arrayidx10, align 4
%indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
%n.wide = zext i32 %n to i64
%exitcond = icmp ne i64 %indvars.iv.next, %n.wide
br i1 %exitcond, label %for.body4, label %for.cond.loopexit
}
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