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Diffstat (limited to 'test/CodeGen/X86/shuffle-combine-crash.ll')
| -rw-r--r-- | test/CodeGen/X86/shuffle-combine-crash.ll | 30 |
1 files changed, 0 insertions, 30 deletions
diff --git a/test/CodeGen/X86/shuffle-combine-crash.ll b/test/CodeGen/X86/shuffle-combine-crash.ll deleted file mode 100644 index 06fcaa973893..000000000000 --- a/test/CodeGen/X86/shuffle-combine-crash.ll +++ /dev/null @@ -1,30 +0,0 @@ -; RUN: llc < %s -mtriple=x86_64-unknown-linux-gnu -mcpu=corei7 - -; Verify that DAGCombiner does not crash when checking if it is -; safe to fold the shuffles in function @sample_test according to rule -; (shuffle (shuffle A, Undef, M0), Undef, M1) -> (shuffle A, Undef, M2) -; -; The DAGCombiner avoids folding shuffles if -; the resulting shuffle dag node is not legal for the target. -; That means, the shuffle must have legal type and legal mask. -; -; Before, the DAGCombiner forgot to check if the resulting shuffle -; was legal. It instead just called method -; 'X86TargetLowering::isShuffleMaskLegal'; however, that was not enough since -; that method always expect to have a valid vector type in input. -; As a consequence, compiling the function below would have caused a crash. - -define void @sample_test() { - br i1 undef, label %5, label %1 - -; <label>:1 ; preds = %0 - %2 = load <4 x i8>, <4 x i8>* undef - %3 = shufflevector <4 x i8> %2, <4 x i8> undef, <4 x i32> <i32 2, i32 2, i32 0, i32 0> - %4 = shufflevector <4 x i8> %3, <4 x i8> undef, <4 x i32> <i32 2, i32 3, i32 0, i32 1> - store <4 x i8> %4, <4 x i8>* undef - br label %5 - -; <label>:5 ; preds = %1, %0 - ret void -} - |