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| author | Evan Cheng <evan.cheng@apple.com> | 2008-02-18 23:04:32 +0000 |
|---|---|---|
| committer | Evan Cheng <evan.cheng@apple.com> | 2008-02-18 23:04:32 +0000 |
| commit | efec751a1b786724862ceff52748df94873a807e (patch) | |
| tree | eaa70165cf0d18db2261a60816bef7d6663661bc /include/llvm/CodeGen | |
| parent | e0cfecf47d466b5776371526c27969e07177b839 (diff) | |
- When DAG combiner is folding a bit convert into a BUILD_VECTOR, it should check if it's essentially a SCALAR_TO_VECTOR. Avoid turning (v8i16) <10, u, u, u> to <10, 0, u, u, u, u, u, u>. Instead, simply convert it to a SCALAR_TO_VECTOR of the proper type.
- X86 now normalize SCALAR_TO_VECTOR to (BIT_CONVERT (v4i32 SCALAR_TO_VECTOR)). Get rid of X86ISD::S2VEC.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@47290 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'include/llvm/CodeGen')
| -rw-r--r-- | include/llvm/CodeGen/SelectionDAGNodes.h | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/include/llvm/CodeGen/SelectionDAGNodes.h b/include/llvm/CodeGen/SelectionDAGNodes.h index 415e291d13..d6a492d0c1 100644 --- a/include/llvm/CodeGen/SelectionDAGNodes.h +++ b/include/llvm/CodeGen/SelectionDAGNodes.h @@ -611,6 +611,11 @@ namespace ISD { /// BUILD_VECTOR where all of the elements are 0 or undef. bool isBuildVectorAllZeros(const SDNode *N); + /// isScalarToVector - Return true if the specified node is a + /// ISD::SCALAR_TO_VECTOR node or a BUILD_VECTOR node where only the low + /// element is not an undef. + bool isScalarToVector(const SDNode *N); + /// isDebugLabel - Return true if the specified node represents a debug /// label (i.e. ISD::LABEL or TargetInstrInfo::LABEL node and third operand /// is 0). |