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