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; Loop Simplify should turn phi nodes like X = phi [X, Y] into just Y, eliminating them.
; RUN: opt < %s -loop-simplify -S | grep phi | count 6
@A = weak global [3000000 x i32] zeroinitializer ; <[3000000 x i32]*> [#uses=1]
@B = weak global [20000 x i32] zeroinitializer ; <[20000 x i32]*> [#uses=1]
@C = weak global [100 x i32] zeroinitializer ; <[100 x i32]*> [#uses=1]
@Z = weak global i32 0 ; <i32*> [#uses=2]
define i32 @main() {
entry:
tail call void @__main( )
br label %loopentry.1
loopentry.1: ; preds = %loopexit.1, %entry
%indvar20 = phi i32 [ 0, %entry ], [ %indvar.next21, %loopexit.1 ] ; <i32> [#uses=1]
%a.1 = phi i32* [ getelementptr ([3000000 x i32], [3000000 x i32]* @A, i32 0, i32 0), %entry ], [ %inc.0, %loopexit.1 ] ; <i32*> [#uses=1]
br label %no_exit.2
no_exit.2: ; preds = %loopexit.2, %no_exit.2, %loopentry.1
%a.0.4.ph = phi i32* [ %a.1, %loopentry.1 ], [ %inc.0, %loopexit.2 ], [ %a.0.4.ph, %no_exit.2 ] ; <i32*> [#uses=3]
%b.1.4.ph = phi i32* [ getelementptr ([20000 x i32], [20000 x i32]* @B, i32 0, i32 0), %loopentry.1 ], [ %inc.1, %loopexit.2 ], [ %b.1.4.ph, %no_exit.2 ] ; <i32*> [#uses=3]
%indvar17 = phi i32 [ 0, %loopentry.1 ], [ %indvar.next18, %loopexit.2 ], [ %indvar17, %no_exit.2 ] ; <i32> [#uses=2]
%indvar = phi i32 [ %indvar.next, %no_exit.2 ], [ 0, %loopexit.2 ], [ 0, %loopentry.1 ] ; <i32> [#uses=5]
%b.1.4.rec = bitcast i32 %indvar to i32 ; <i32> [#uses=1]
%gep.upgrd.1 = zext i32 %indvar to i64 ; <i64> [#uses=1]
%c.2.4 = getelementptr [100 x i32], [100 x i32]* @C, i32 0, i64 %gep.upgrd.1 ; <i32*> [#uses=1]
%gep.upgrd.2 = zext i32 %indvar to i64 ; <i64> [#uses=1]
%a.0.4 = getelementptr i32, i32* %a.0.4.ph, i64 %gep.upgrd.2 ; <i32*> [#uses=1]
%gep.upgrd.3 = zext i32 %indvar to i64 ; <i64> [#uses=1]
%b.1.4 = getelementptr i32, i32* %b.1.4.ph, i64 %gep.upgrd.3 ; <i32*> [#uses=1]
%inc.0.rec = add i32 %b.1.4.rec, 1 ; <i32> [#uses=2]
%inc.0 = getelementptr i32, i32* %a.0.4.ph, i32 %inc.0.rec ; <i32*> [#uses=2]
%tmp.13 = load i32, i32* %a.0.4 ; <i32> [#uses=1]
%inc.1 = getelementptr i32, i32* %b.1.4.ph, i32 %inc.0.rec ; <i32*> [#uses=1]
%tmp.15 = load i32, i32* %b.1.4 ; <i32> [#uses=1]
%tmp.18 = load i32, i32* %c.2.4 ; <i32> [#uses=1]
%tmp.16 = mul i32 %tmp.15, %tmp.13 ; <i32> [#uses=1]
%tmp.19 = mul i32 %tmp.16, %tmp.18 ; <i32> [#uses=1]
%tmp.20 = load i32, i32* @Z ; <i32> [#uses=1]
%tmp.21 = add i32 %tmp.19, %tmp.20 ; <i32> [#uses=1]
store i32 %tmp.21, i32* @Z
%indvar.next = add i32 %indvar, 1 ; <i32> [#uses=2]
%exitcond = icmp eq i32 %indvar.next, 100 ; <i1> [#uses=1]
br i1 %exitcond, label %loopexit.2, label %no_exit.2
loopexit.2: ; preds = %no_exit.2
%indvar.next18 = add i32 %indvar17, 1 ; <i32> [#uses=2]
%exitcond19 = icmp eq i32 %indvar.next18, 200 ; <i1> [#uses=1]
br i1 %exitcond19, label %loopexit.1, label %no_exit.2
loopexit.1: ; preds = %loopexit.2
%indvar.next21 = add i32 %indvar20, 1 ; <i32> [#uses=2]
%exitcond22 = icmp eq i32 %indvar.next21, 300 ; <i1> [#uses=1]
br i1 %exitcond22, label %return, label %loopentry.1
return: ; preds = %loopexit.1
ret i32 undef
}
declare void @__main()
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