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Add a missed optimization

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@24495 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner 2005-11-28 04:52:39 +00:00
parent ac5bb69a4d
commit 1e4ed93599
1 changed files with 9 additions and 0 deletions
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9
lib/Target/X86/README.txt
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@ -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