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missed optzn

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llvm-svn: 26299
This commit is contained in:
Chris Lattner 2006-02-21 18:29:44 +00:00
parent dfdfc6b22d
commit 5d8ecbe2e5
1 changed files with 11 additions and 0 deletions
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11
lib/Target/README.txt
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@ -68,3 +68,14 @@ int %test(int %A) {
This sort of thing occurs in the alloca lowering code and other places that
are generating alignment of an already aligned value.
//===---------------------------------------------------------------------===//
Turn this into a signed shift right in instcombine:
int f(unsigned x) {
return x >> 31 ? -1 : 0;
}
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=25600
http://gcc.gnu.org/ml/gcc-patches/2006-02/msg01492.html