| Commit message (Collapse) | Author | Age | Files | Lines | |
|---|---|---|---|---|---|
| * | Update test. | Benjamin Kramer | 2011-07-26 | 1 | -1/+1 |
| | | | | | git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@136170 91177308-0d34-0410-b5e6-96231b3b80d8 | ||||
| * | Add a neat little two's complement hack for x86. | Benjamin Kramer | 2011-07-26 | 1 | -0/+11 |
| On x86 we can't encode an immediate LHS of a sub directly. If the RHS comes from a XOR with a constant we can fold the negation into the xor and add one to the immediate of the sub. Then we can turn the sub into an add, which can be commuted and encoded efficiently. This code is generated for __builtin_clz and friends. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@136167 91177308-0d34-0410-b5e6-96231b3b80d8 | |||||
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