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| -rw-r--r-- | lib/Target/README.txt | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/lib/Target/README.txt b/lib/Target/README.txt index e9133721f4..fe11900353 100644 --- a/lib/Target/README.txt +++ b/lib/Target/README.txt @@ -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: |