diff options
| -rw-r--r-- | lib/Target/X86/README.txt | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/lib/Target/X86/README.txt b/lib/Target/X86/README.txt index 72965d0759..0bf8c4f8b4 100644 --- a/lib/Target/X86/README.txt +++ b/lib/Target/X86/README.txt @@ -23,6 +23,14 @@ generic code. //===---------------------------------------------------------------------===// +CodeGen/X86/lea-3.ll:test3 should be a single LEA, not a shift/move. The X86 +backend knows how to three-addressify this shift, but it appears the register +allocator isn't even asking it to do so in this case. We should investigate +why this isn't happening, it could have significant impact on other important +cases for X86 as well. + +//===---------------------------------------------------------------------===// + This should be one DIV/IDIV instruction, not a libcall: unsigned test(unsigned long long X, unsigned Y) { |