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Add two notes for correlated-expression optimizations.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@139263 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Benjamin Kramer 2011-09-07 22:49:26 +00:00
parent 0472e040cb
commit 3e328ecbd8
1 changed files with 10 additions and 0 deletions
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10
lib/Target/README.txt
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@ -2348,3 +2348,13 @@ which can do this in a single operation (instruction or libcall). It is
probably best to do this in the code generator.
//===---------------------------------------------------------------------===//
unsigned foo(unsigned x, unsigned y) { return (x & y) == 0 || x == 0; }
should fold to (x & y) == 0.
//===---------------------------------------------------------------------===//
unsigned foo(unsigned x, unsigned y) { return x > y && x != 0; }
should fold to x > y.
//===---------------------------------------------------------------------===//