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| author | Nick Lewycky <nicholas@mxc.ca> | 2009-01-02 18:54:17 +0000 |
|---|---|---|
| committer | Nick Lewycky <nicholas@mxc.ca> | 2009-01-02 18:54:17 +0000 |
| commit | 3dab9edfde372c31257bcd2b5f8ada7dc66ce0e5 (patch) | |
| tree | 074ea712ec738862611916f0994f712ef6b43273 /test/Analysis | |
| parent | 0fd5f3e4264b5f88055ab4f8135716d3cb013743 (diff) | |
| download | external_llvm-3dab9edfde372c31257bcd2b5f8ada7dc66ce0e5.zip external_llvm-3dab9edfde372c31257bcd2b5f8ada7dc66ce0e5.tar.gz external_llvm-3dab9edfde372c31257bcd2b5f8ada7dc66ce0e5.tar.bz2 | |
Don't try to analyze this "backward" case. This is overly conservative
pending a correct solution.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@61589 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'test/Analysis')
| -rw-r--r-- | test/Analysis/ScalarEvolution/2009-01-02-SignedNegativeStride.ll | 40 |
1 files changed, 40 insertions, 0 deletions
diff --git a/test/Analysis/ScalarEvolution/2009-01-02-SignedNegativeStride.ll b/test/Analysis/ScalarEvolution/2009-01-02-SignedNegativeStride.ll new file mode 100644 index 0000000..07714cd --- /dev/null +++ b/test/Analysis/ScalarEvolution/2009-01-02-SignedNegativeStride.ll @@ -0,0 +1,40 @@ +; RUN: llvm-as < %s | opt -analyze -scalar-evolution | not grep {/u -1} +; PR3275 + +@g_16 = external global i16 ; <i16*> [#uses=3] +@.str = external constant [4 x i8] ; <[4 x i8]*> [#uses=0] + +define void @func_15() nounwind { +entry: + %0 = load i16* @g_16, align 2 ; <i16> [#uses=1] + %1 = icmp sgt i16 %0, 0 ; <i1> [#uses=1] + br i1 %1, label %bb2, label %bb.nph + +bb.nph: ; preds = %entry + %g_16.promoted = load i16* @g_16 ; <i16> [#uses=1] + br label %bb + +bb: ; preds = %bb1, %bb.nph + %g_16.tmp.0 = phi i16 [ %g_16.promoted, %bb.nph ], [ %2, %bb1 ] ; <i16> [#uses=1] + %2 = add i16 %g_16.tmp.0, -1 ; <i16> [#uses=3] + br label %bb1 + +bb1: ; preds = %bb + %3 = icmp sgt i16 %2, 0 ; <i1> [#uses=1] + br i1 %3, label %bb1.bb2_crit_edge, label %bb + +bb1.bb2_crit_edge: ; preds = %bb1 + store i16 %2, i16* @g_16 + br label %bb2 + +bb2: ; preds = %bb1.bb2_crit_edge, %entry + br label %return + +return: ; preds = %bb2 + ret void +} + +declare i32 @main() nounwind + +declare i32 @printf(i8*, ...) nounwind + |