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| author | Chris Lattner <sabre@nondot.org> | 2007-12-24 19:27:46 +0000 |
|---|---|---|
| committer | Chris Lattner <sabre@nondot.org> | 2007-12-24 19:27:46 +0000 |
| commit | 44cb8efdc19207fdb12c261821fbcb0516b8bcbd (patch) | |
| tree | de78e4fa6d756781429f81d5df862f0003da0d48 | |
| parent | 97d37260df83eaac0f8876087ad2c53f07d6efc9 (diff) | |
| download | external_llvm-44cb8efdc19207fdb12c261821fbcb0516b8bcbd.zip external_llvm-44cb8efdc19207fdb12c261821fbcb0516b8bcbd.tar.gz external_llvm-44cb8efdc19207fdb12c261821fbcb0516b8bcbd.tar.bz2 | |
add a simple hack
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@45343 91177308-0d34-0410-b5e6-96231b3b80d8
| -rw-r--r-- | lib/Target/X86/README.txt | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/lib/Target/X86/README.txt b/lib/Target/X86/README.txt index 8effd47..ad15b14 100644 --- a/lib/Target/X86/README.txt +++ b/lib/Target/X86/README.txt @@ -1573,3 +1573,15 @@ _test: //===---------------------------------------------------------------------===// +We can fold a store into "zeroing a reg". Instead of: + +xorl %eax, %eax +movl %eax, 124(%esp) + +we should get: + +movl $0, 124(%esp) + +if the flags of the xor are dead. + +//===---------------------------------------------------------------------===// |