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| author | Chris Lattner <sabre@nondot.org> | 2005-11-28 04:52:39 +0000 |
|---|---|---|
| committer | Chris Lattner <sabre@nondot.org> | 2005-11-28 04:52:39 +0000 |
| commit | 1e4ed935995b90ba58353decb8c8c5743c33d00a (patch) | |
| tree | 358525f53889f11575e01ce8ee43bfd66cefa4fc /lib | |
| parent | ac5bb69a4db38833502bd22df4cce32349a81c35 (diff) | |
| download | llvm-1e4ed935995b90ba58353decb8c8c5743c33d00a.tar.gz llvm-1e4ed935995b90ba58353decb8c8c5743c33d00a.tar.bz2 llvm-1e4ed935995b90ba58353decb8c8c5743c33d00a.tar.xz | |
Add a missed optimization
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@24495 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib')
| -rw-r--r-- | lib/Target/X86/README.txt | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/lib/Target/X86/README.txt b/lib/Target/X86/README.txt index 354439bfdb..c9f23d598b 100644 --- a/lib/Target/X86/README.txt +++ b/lib/Target/X86/README.txt @@ -73,3 +73,12 @@ Another useful one would be ~0ULL >> X and ~0ULL << X. Should support emission of the bswap instruction, probably by adding a new DAG node for byte swapping. Also useful on PPC which has byte-swapping loads. +//===---------------------------------------------------------------------===// + +Compile this: +_Bool f(_Bool a) { return a!=1; } + +into: + movzbl %dil, %eax + xorl $1, %eax + ret |