| commit | ea1c45405d8e886497cabb90370e82114d4166ba | [log] [tgz] |
|---|---|---|
| author | Chris Lattner <sabre@nondot.org> | Wed Dec 08 23:43:58 2004 +0000 |
| committer | Chris Lattner <sabre@nondot.org> | Wed Dec 08 23:43:58 2004 +0000 |
| tree | ac816510ef606b2d62d168592cba120a111ba337 | |
| parent | a95cf3024b9a3c3ed6bf3e862d956ce46a8cbebe [diff] |
Do extremely simple sinking of instructions when they are only used in a
successor block. This turns cases like this:
x = a op b
if (c) {
use x
}
into:
if (c) {
x = a op b
use x
}
This triggers 3965 times in spec, and is tested by
Regression/Transforms/InstCombine/sink_instruction.ll
This appears to expose a bug in the X86 backend for 177.mesa, which I'm
looking in to.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@18677 91177308-0d34-0410-b5e6-96231b3b80d8