llvm-6502/test/CodeGen/X86/overlap-add.ll
Chris Lattner 52da8845c6 fix two spellos
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@27050 91177308-0d34-0410-b5e6-96231b3b80d8
2006-03-24 07:13:29 +00:00

28 lines
821 B
LLVM

;; X's live range extends beyond the shift, so the register allocator
;; cannot coalesce it with Y. Because of this, a copy needs to be
;; emitted before the shift to save the register value before it is
;; clobbered. However, this copy is not needed if the register
;; allocator turns the shift into an LEA. This also occurs for ADD.
; Check that the shift gets turned into an LEA.
; RUN: llvm-as < %s | llc -march=x86 -x86-asm-syntax=intel | not grep 'mov %E.X, %E.X'
; FIXME: We need live variable information about flags to do this xform safely. :(
; XFAIL: *
%G = external global int
int %test1(int %X, int %Y) {
%Z = add int %X, %Y
volatile store int %Y, int* %G
volatile store int %Z, int* %G
ret int %X
}
int %test2(int %X) {
%Z = add int %X, 1 ;; inc
volatile store int %Z, int* %G
ret int %X
}