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llvm-svn: 26472
2006-03-02 22:34:38 +00:00 · 2006-03-02 22:34:38 +00:00 · 9067500e2e
parent dc41f80f70
commit 9067500e2e
1 changed files with 7 additions and 0 deletions
--- a/llvm/lib/Target/README.txt
+++ b/llvm/lib/Target/README.txt
@ -79,3 +79,10 @@ int f(unsigned x) {
 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=25600
 http://gcc.gnu.org/ml/gcc-patches/2006-02/msg01492.html

+//===---------------------------------------------------------------------===//
+
+We should reassociate:
+int f(int a, int b){ return a * a + 2 * a * b + b * b; }
+into:
+int f(int a, int b) { return a * (a + 2 * b) + b * b; }
+to eliminate a multiply.