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author | Dan Gohman <gohman@apple.com> | 2009-02-16 00:56:15 +0000 |
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committer | Dan Gohman <gohman@apple.com> | 2009-02-16 00:56:15 +0000 |
commit | 74786c0f4360db7547f8a12980260b5b7a441627 (patch) | |
tree | b6c70648223bc2e9f62a6c4f33748f7c7d05b4da /test/Transforms/IndVarSimplify/variable-stride-ivs.ll | |
parent | 926b0a27b9adf79b89042785b8496cced5a49883 (diff) | |
download | external_llvm-74786c0f4360db7547f8a12980260b5b7a441627.zip external_llvm-74786c0f4360db7547f8a12980260b5b7a441627.tar.gz external_llvm-74786c0f4360db7547f8a12980260b5b7a441627.tar.bz2 |
Rename IndVarsSimplify to IndVarSimplify, to be consistent with
the name used in the code that these tests are for.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@64624 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'test/Transforms/IndVarSimplify/variable-stride-ivs.ll')
-rw-r--r-- | test/Transforms/IndVarSimplify/variable-stride-ivs.ll | 43 |
1 files changed, 43 insertions, 0 deletions
diff --git a/test/Transforms/IndVarSimplify/variable-stride-ivs.ll b/test/Transforms/IndVarSimplify/variable-stride-ivs.ll new file mode 100644 index 0000000..759ba8e --- /dev/null +++ b/test/Transforms/IndVarSimplify/variable-stride-ivs.ll @@ -0,0 +1,43 @@ +; RUN: llvm-as < %s | opt -indvars -instcombine | llvm-dis | \ +; RUN: grep {store i32 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. +; END. + +define void @vnum_test8(i32* %data) { +entry: + %tmp.1 = getelementptr i32* %data, i32 3 ; <i32*> [#uses=1] + %tmp.2 = load i32* %tmp.1 ; <i32> [#uses=2] + %tmp.4 = getelementptr i32* %data, i32 4 ; <i32*> [#uses=1] + %tmp.5 = load i32* %tmp.4 ; <i32> [#uses=2] + %tmp.8 = getelementptr i32* %data, i32 2 ; <i32*> [#uses=1] + %tmp.9 = load i32* %tmp.8 ; <i32> [#uses=3] + %tmp.125 = icmp sgt i32 %tmp.2, 0 ; <i1> [#uses=1] + br i1 %tmp.125, label %no_exit.preheader, label %return + +no_exit.preheader: ; preds = %entry + %tmp.16 = getelementptr i32* %data, i32 %tmp.9 ; <i32*> [#uses=1] + br label %no_exit + +no_exit: ; preds = %no_exit, %no_exit.preheader + %iv.ui = phi i32 [ 0, %no_exit.preheader ], [ %iv..inc.ui, %no_exit ] ; <i32> [#uses=1] + %iv. = phi i32 [ %tmp.5, %no_exit.preheader ], [ %iv..inc, %no_exit ] ; <i32> [#uses=2] + %m.0.0 = phi i32 [ %tmp.5, %no_exit.preheader ], [ %tmp.24, %no_exit ] ; <i32> [#uses=2] + store i32 2, i32* %tmp.16 + %tmp.21 = sub i32 %m.0.0, %iv. ; <i32> [#uses=1] + store i32 %tmp.21, i32* %data + %tmp.24 = add i32 %m.0.0, %tmp.9 ; <i32> [#uses=1] + %iv..inc = add i32 %tmp.9, %iv. ; <i32> [#uses=1] + %iv..inc.ui = add i32 %iv.ui, 1 ; <i32> [#uses=2] + %iv..inc1 = bitcast i32 %iv..inc.ui to i32 ; <i32> [#uses=1] + %tmp.12 = icmp slt i32 %iv..inc1, %tmp.2 ; <i1> [#uses=1] + br i1 %tmp.12, label %no_exit, label %return.loopexit + +return.loopexit: ; preds = %no_exit + br label %return + +return: ; preds = %return.loopexit, %entry + ret void +} + |