diff options
| -rw-r--r-- | lib/Target/X86/README.txt | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/lib/Target/X86/README.txt b/lib/Target/X86/README.txt index 477838d0e5..9ac0bb5972 100644 --- a/lib/Target/X86/README.txt +++ b/lib/Target/X86/README.txt @@ -26,6 +26,15 @@ long long test(int X, int Y) { return (long long)X*Y; } ... which should only be one imul instruction. +or: + +unsigned long long int t2(unsigned int a, unsigned int b) { + return (unsigned long long)a * b; +} + +... which should be one mul instruction. + + This can be done with a custom expander, but it would be nice to move this to generic code. |