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| author | Bill Wendling <isanbard@gmail.com> | 2008-11-30 13:08:13 +0000 |
|---|---|---|
| committer | Bill Wendling <isanbard@gmail.com> | 2008-11-30 13:08:13 +0000 |
| commit | 7f0ef6b325d0f6061c584ab93ebb083b87bca4ff (patch) | |
| tree | fdce24fc331229e1683b504ac65d4b91b6d04172 /lib/Target/README.txt | |
| parent | 7c7048ecc688d57d10689009719dc2513a03250e (diff) | |
| download | llvm-7f0ef6b325d0f6061c584ab93ebb083b87bca4ff.tar.gz llvm-7f0ef6b325d0f6061c584ab93ebb083b87bca4ff.tar.bz2 llvm-7f0ef6b325d0f6061c584ab93ebb083b87bca4ff.tar.xz | |
Implement (A&((~A)|B)) -> A&B transformation in the instruction combiner. This
takes care of all permutations of this pattern.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60290 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib/Target/README.txt')
| -rw-r--r-- | lib/Target/README.txt | 10 |
1 files changed, 0 insertions, 10 deletions
diff --git a/lib/Target/README.txt b/lib/Target/README.txt index b0d93f0264..bf7c0b1447 100644 --- a/lib/Target/README.txt +++ b/lib/Target/README.txt @@ -1086,16 +1086,6 @@ produces better code on X86. //===---------------------------------------------------------------------===// -From GCC Bug 33512: -int f(int y, int x) -{ - return x & ((~x) | y); -} -Should combine to x & y. Currently not optimized with "clang --emit-llvm-bc | opt -std-compile-opts". - -//===---------------------------------------------------------------------===// - From GCC Bug 15784: #define abs(x) x>0?x:-x int f(int x, int y) |