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| author | Evan Cheng <evan.cheng@apple.com> | 2005-12-17 06:54:43 +0000 |
|---|---|---|
| committer | Evan Cheng <evan.cheng@apple.com> | 2005-12-17 06:54:43 +0000 |
| commit | 98abbfb2ef9c19238a0eb1683814b2ba6bbacdcb (patch) | |
| tree | a08d790d7f37c9c6be584b81bbdd54e691bc5f29 | |
| parent | 0d8fcd3218ed93e338a2e7b845f358f1c6f74d58 (diff) | |
Added an idea about any_extend for performance tuning.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@24763 91177308-0d34-0410-b5e6-96231b3b80d8
| -rw-r--r-- | lib/Target/X86/README.txt | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/lib/Target/X86/README.txt b/lib/Target/X86/README.txt index 6e23fca25c..5fdcc69619 100644 --- a/lib/Target/X86/README.txt +++ b/lib/Target/X86/README.txt @@ -102,3 +102,8 @@ Some isel ideas: //===---------------------------------------------------------------------===// Should we promote i16 to i32 to avoid partial register update stalls? + +//===---------------------------------------------------------------------===// + +Leave any_extend as pseudo instruction and hint to register +allocator. Delay codegen until post register allocation. |