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| author | Evan Cheng <evan.cheng@apple.com> | 2009-07-10 02:10:17 +0000 |
|---|---|---|
| committer | Evan Cheng <evan.cheng@apple.com> | 2009-07-10 02:10:17 +0000 |
| commit | b6264decdbec4940f66a8850450ab1c31f058b4c (patch) | |
| tree | a73ac66d7dec86734b085449fd6907d5a962f155 | |
| parent | 892837abf35c2c1439af9066a9c2aaa3b3f0e72b (diff) | |
| download | llvm-b6264decdbec4940f66a8850450ab1c31f058b4c.tar.gz llvm-b6264decdbec4940f66a8850450ab1c31f058b4c.tar.bz2 llvm-b6264decdbec4940f66a8850450ab1c31f058b4c.tar.xz | |
More info about Thumb1 predication support.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@75220 91177308-0d34-0410-b5e6-96231b3b80d8
| -rw-r--r-- | lib/Target/ARM/README-Thumb.txt | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/lib/Target/ARM/README-Thumb.txt b/lib/Target/ARM/README-Thumb.txt index 3b27ed3889..eed3c54372 100644 --- a/lib/Target/ARM/README-Thumb.txt +++ b/lib/Target/ARM/README-Thumb.txt @@ -236,4 +236,5 @@ to avoid extra work when we convert Thumb2 instructions to Thumb1 instructions. //===---------------------------------------------------------------------===// We need to make (some of the) Thumb1 instructions predicable. That will allow -shrinking of predicated Thumb2 instructions. +shrinking of predicated Thumb2 instructions. To allow this, we need to be able +to toggle the 's' bit since they do not set CPSR when they are inside IT blocks. |