diff options
| -rw-r--r-- | lib/Target/README.txt | 12 |
1 files changed, 10 insertions, 2 deletions
diff --git a/lib/Target/README.txt b/lib/Target/README.txt index 8f785393fd..90afe3640c 100644 --- a/lib/Target/README.txt +++ b/lib/Target/README.txt @@ -1918,9 +1918,17 @@ a: .LBB0_2: ret .LBB0_3: - xorb %al, %al - jmp foo@PLT # TAILCALL + jmp foo # TAILCALL The movl+movl+btq+jb could be simplified to a cmpl+jne. +Or, if we wanted to be really clever, we could simplify the whole thing to +something like the following, which eliminates a branch: + xorl $1, %edi + cmpl $4, %edi + ja .LBB0_2 + ret +.LBB0_2: + jmp foo # TAILCALL + //===---------------------------------------------------------------------===// |