| commit | 5b95ed652fcfe578aa8af4e21318fca989164e21 | [log] [tgz] |
|---|---|---|
| author | Chris Lattner <sabre@nondot.org> | Tue Apr 12 02:19:10 2005 +0000 |
| committer | Chris Lattner <sabre@nondot.org> | Tue Apr 12 02:19:10 2005 +0000 |
| tree | b1791d6b9cf62d61986587863e5b69e1b482b49c | |
| parent | 08b698e38db5ab5db44c0472e2a7f4f780887629 [diff] |
Emit comparisons against the sign bit better. Codegen this:
bool %test1(long %X) {
%A = setlt long %X, 0
ret bool %A
}
like this:
test1:
cmpl $0, 8(%esp)
setl %al
movzbl %al, %eax
ret
instead of:
test1:
movl 8(%esp), %ecx
cmpl $0, %ecx
setl %al
movzbw %al, %ax
cmpl $0, 4(%esp)
setb %dl
movzbw %dl, %dx
cmpl $0, %ecx
cmove %dx, %ax
movzbl %al, %eax
ret
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21243 91177308-0d34-0410-b5e6-96231b3b80d8