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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22745 91177308-0d34-0410-b5e6-96231b3b80d8
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Chris Lattner 2005-08-10 02:06:35 +00:00
parent cda9ca5a4f
commit 8d56cdd0d1
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test/Transforms/LoopSimplify/phi-node-simplify.ll Normal file
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; Loop Simplify should turn phi nodes like X = phi [X, Y] into just Y, eliminating them.
; RUN: llvm-as < %s | opt -loopsimplify | llvm-dis | grep phi | wc -l | grep 6
%A = weak global [3000000 x int] zeroinitializer ; <[3000000 x int]*> [#uses=1]
%B = weak global [20000 x int] zeroinitializer ; <[20000 x int]*> [#uses=1]
%C = weak global [100 x int] zeroinitializer ; <[100 x int]*> [#uses=1]
%Z = weak global int 0 ; <int*> [#uses=2]
implementation ; Functions:
int %main() {
entry:
tail call void %__main( )
br label %loopentry.1
loopentry.1: ; preds = %loopexit.1, %entry
%indvar20 = phi uint [ 0, %entry ], [ %indvar.next21, %loopexit.1 ] ; <uint> [#uses=1]
%a.1 = phi int* [ getelementptr ([3000000 x int]* %A, int 0, int 0), %entry ], [ %inc.0, %loopexit.1 ] ; <int*> [#uses=1]
br label %no_exit.2
no_exit.2: ; preds = %loopexit.2, %no_exit.2, %loopentry.1
%a.0.4.ph = phi int* [ %a.1, %loopentry.1 ], [ %inc.0, %loopexit.2 ], [ %a.0.4.ph, %no_exit.2 ] ; <int*> [#uses=3]
%b.1.4.ph = phi int* [ getelementptr ([20000 x int]* %B, int 0, int 0), %loopentry.1 ], [ %inc.1, %loopexit.2 ], [ %b.1.4.ph, %no_exit.2 ] ; <int*> [#uses=3]
%indvar17 = phi uint [ 0, %loopentry.1 ], [ %indvar.next18, %loopexit.2 ], [ %indvar17, %no_exit.2 ] ; <uint> [#uses=2]
%indvar = phi uint [ %indvar.next, %no_exit.2 ], [ 0, %loopexit.2 ], [ 0, %loopentry.1 ] ; <uint> [#uses=5]
%b.1.4.rec = cast uint %indvar to int ; <int> [#uses=1]
%c.2.4 = getelementptr [100 x int]* %C, int 0, uint %indvar ; <int*> [#uses=1]
%a.0.4 = getelementptr int* %a.0.4.ph, uint %indvar ; <int*> [#uses=1]
%b.1.4 = getelementptr int* %b.1.4.ph, uint %indvar ; <int*> [#uses=1]
%inc.0.rec = add int %b.1.4.rec, 1 ; <int> [#uses=2]
%inc.0 = getelementptr int* %a.0.4.ph, int %inc.0.rec ; <int*> [#uses=2]
%tmp.13 = load int* %a.0.4 ; <int> [#uses=1]
%inc.1 = getelementptr int* %b.1.4.ph, int %inc.0.rec ; <int*> [#uses=1]
%tmp.15 = load int* %b.1.4 ; <int> [#uses=1]
%tmp.18 = load int* %c.2.4 ; <int> [#uses=1]
%tmp.16 = mul int %tmp.15, %tmp.13 ; <int> [#uses=1]
%tmp.19 = mul int %tmp.16, %tmp.18 ; <int> [#uses=1]
%tmp.20 = load int* %Z ; <int> [#uses=1]
%tmp.21 = add int %tmp.19, %tmp.20 ; <int> [#uses=1]
store int %tmp.21, int* %Z
%indvar.next = add uint %indvar, 1 ; <uint> [#uses=2]
%exitcond = seteq uint %indvar.next, 100 ; <bool> [#uses=1]
br bool %exitcond, label %loopexit.2, label %no_exit.2
loopexit.2: ; preds = %no_exit.2
%indvar.next18 = add uint %indvar17, 1 ; <uint> [#uses=2]
%exitcond19 = seteq uint %indvar.next18, 200 ; <bool> [#uses=1]
br bool %exitcond19, label %loopexit.1, label %no_exit.2
loopexit.1: ; preds = %loopexit.2
%indvar.next21 = add uint %indvar20, 1 ; <uint> [#uses=2]
%exitcond22 = seteq uint %indvar.next21, 300 ; <bool> [#uses=1]
br bool %exitcond22, label %return, label %loopentry.1
return: ; preds = %loopexit.1
ret int undef
}
declare void %__main()