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| author | Bill Wendling <isanbard@gmail.com> | 2008-05-28 22:54:52 +0000 |
|---|---|---|
| committer | Bill Wendling <isanbard@gmail.com> | 2008-05-28 22:54:52 +0000 |
| commit | 8370d38adee63b3a4d87bfe81be4aacc55fe7cda (patch) | |
| tree | 4689ca3c0b6ee971d3aef6ec8536642eefb377a8 /utils/TableGen/CodeGenInstruction.cpp | |
| parent | a8db14796b22ba7798ef94fc831d56c8a11d4e2a (diff) | |
| download | llvm-8370d38adee63b3a4d87bfe81be4aacc55fe7cda.tar.gz llvm-8370d38adee63b3a4d87bfe81be4aacc55fe7cda.tar.bz2 llvm-8370d38adee63b3a4d87bfe81be4aacc55fe7cda.tar.xz | |
Add a flag to indicate that an instruction is as cheap (or cheaper) than a move
instruction to execute. This can be used for transformations (like two-address
conversion) to remat an instruction instead of generating a "move"
instruction. The idea is to decrease the live ranges and register pressure and
all that jazz.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@51660 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'utils/TableGen/CodeGenInstruction.cpp')
| -rw-r--r-- | utils/TableGen/CodeGenInstruction.cpp | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/utils/TableGen/CodeGenInstruction.cpp b/utils/TableGen/CodeGenInstruction.cpp index 53daf9d944..37c2069ec7 100644 --- a/utils/TableGen/CodeGenInstruction.cpp +++ b/utils/TableGen/CodeGenInstruction.cpp @@ -99,6 +99,7 @@ CodeGenInstruction::CodeGenInstruction(Record *R, const std::string &AsmStr) hasSideEffects = R->getValueAsBit("hasSideEffects"); mayHaveSideEffects = R->getValueAsBit("mayHaveSideEffects"); neverHasSideEffects = R->getValueAsBit("neverHasSideEffects"); + isAsCheapAsAMove = R->getValueAsBit("isAsCheapAsAMove"); hasOptionalDef = false; isVariadic = false; |