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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@54602 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner 2008-08-10 00:47:21 +00:00
parent afcde473c5
commit c90b866797
1 changed files with 13 additions and 0 deletions
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13
lib/Target/README.txt
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@ -438,6 +438,19 @@ long long fib(const long long n) {
//===---------------------------------------------------------------------===//
Tail recursion elimination should handle:
int pow2m1(int n) {
if (n == 0)
return 0;
return 2 * pow2m1 (n - 1) + 1;
}
Also, multiplies can be turned into SHL's, so they should be handled as if
they were associative. "return foo() << 1" can be tail recursion eliminated.
//===---------------------------------------------------------------------===//
Argument promotion should promote arguments for recursive functions, like
this: