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new testcase

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22743 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner 2005-08-10 01:11:24 +00:00
parent 05bd374b1f
commit a12489e34f
1 changed files with 41 additions and 0 deletions
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41
test/Transforms/IndVarsSimplify/variable-stride-ivs.ll Normal file
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; RUN: llvm-as < %s | opt -indvars -instcombine | llvm-dis | grep 'store int 0'
; Test that -indvars can reduce variable stride IVs. If it can reduce variable
; stride iv's, it will make %iv. and %m.0.0 isomorphic to each other without
; cycles, allowing the tmp.21 subtraction to be eliminated.
void %vnum_test8(int* %data) {
entry:
%tmp.1 = getelementptr int* %data, int 3 ; <int*> [#uses=1]
%tmp.2 = load int* %tmp.1 ; <int> [#uses=2]
%tmp.4 = getelementptr int* %data, int 4 ; <int*> [#uses=1]
%tmp.5 = load int* %tmp.4 ; <int> [#uses=2]
%tmp.8 = getelementptr int* %data, int 2 ; <int*> [#uses=1]
%tmp.9 = load int* %tmp.8 ; <int> [#uses=3]
%tmp.125 = setgt int %tmp.2, 0 ; <bool> [#uses=1]
br bool %tmp.125, label %no_exit.preheader, label %return
no_exit.preheader: ; preds = %entry
%tmp.16 = getelementptr int* %data, int %tmp.9 ; <int*> [#uses=1]
br label %no_exit
no_exit: ; preds = %no_exit, %no_exit.preheader
%iv. = phi uint [ 0, %no_exit.preheader ], [ %iv..inc, %no_exit ] ; <uint> [#uses=1]
%iv. = phi int [ %tmp.5, %no_exit.preheader ], [ %iv..inc, %no_exit ] ; <int> [#uses=2]
%m.0.0 = phi int [ %tmp.5, %no_exit.preheader ], [ %tmp.24, %no_exit ] ; <int> [#uses=2]
store int 2, int* %tmp.16
%tmp.21 = sub int %m.0.0, %iv. ; <int> [#uses=1]
store int %tmp.21, int* %data
%tmp.24 = add int %m.0.0, %tmp.9 ; <int> [#uses=1]
%iv..inc = add int %tmp.9, %iv. ; <int> [#uses=1]
%iv..inc = add uint %iv., 1 ; <uint> [#uses=2]
%iv..inc1 = cast uint %iv..inc to int ; <int> [#uses=1]
%tmp.12 = setlt int %iv..inc1, %tmp.2 ; <bool> [#uses=1]
br bool %tmp.12, label %no_exit, label %return.loopexit
return.loopexit: ; preds = %no_exit
br label %return
return: ; preds = %return.loopexit, %entry
ret void
}