llvm.org GIT mirror llvm / release_29 test / CodeGen / X86 / subreg-to-reg-1.ll
release_29

Tree @release_29 (Download .tar.gz)

subreg-to-reg-1.ll @release_29raw · history · blame

; RUN: llc < %s -march=x86-64 | grep {leal	.*), %e.\*} | count 1

; Don't eliminate or coalesce away the explicit zero-extension!
; This is currently using an leal because of a 3-addressification detail,
; though this isn't necessary; The point of this test is to make sure
; a 32-bit add is used.

define i64 @foo(i64 %a) nounwind {
  %b = add i64 %a, 4294967295
  %c = and i64 %b, 4294967295
  %d = add i64 %c, 1
  ret i64 %d
}