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| author | Bob Wilson <bob.wilson@apple.com> | 2011-10-18 17:34:47 +0000 |
|---|---|---|
| committer | Bob Wilson <bob.wilson@apple.com> | 2011-10-18 17:34:47 +0000 |
| commit | db2b18febaea04d01b3dcb24fc44d5be7bd27a00 (patch) | |
| tree | a0c97b10dc98fcc7d0cfed673c0d3fb733d10886 /test/CodeGen/ARM/vector-DAGCombine.ll | |
| parent | 630243a8c2d40df137b64246b7ed4363962fd9b4 (diff) | |
Fix a DAG combiner assertion failure when constant folding BUILD_VECTORS.
svn r139159 caused SelectionDAG::getConstant() to promote BUILD_VECTOR operands
with illegal types, even before type legalization. For this testcase, that led
to one BUILD_VECTOR with i16 operands and another with promoted i32 operands,
which triggered the assertion.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@142370 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'test/CodeGen/ARM/vector-DAGCombine.ll')
| -rw-r--r-- | test/CodeGen/ARM/vector-DAGCombine.ll | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/test/CodeGen/ARM/vector-DAGCombine.ll b/test/CodeGen/ARM/vector-DAGCombine.ll index 81bdc44863..1a97982eb0 100644 --- a/test/CodeGen/ARM/vector-DAGCombine.ll +++ b/test/CodeGen/ARM/vector-DAGCombine.ll @@ -123,3 +123,13 @@ define void @orVec(<3 x i8>* %A) nounwind { ret void } +; The following test was hitting an assertion in the DAG combiner when +; constant folding the multiply because the "sext undef" was translated to +; a BUILD_VECTOR with i32 0 operands, which did not match the i16 operands +; of the other BUILD_VECTOR. +define i16 @foldBuildVectors() { + %1 = sext <8 x i8> undef to <8 x i16> + %2 = mul <8 x i16> %1, <i16 255, i16 255, i16 255, i16 255, i16 255, i16 255, i16 255, i16 255> + %3 = extractelement <8 x i16> %2, i32 0 + ret i16 %3 +} |