1 ;; X's live range extends beyond the shift, so the register allocator
2 ;; cannot coallesce it with Y. Because of this, a copy needs to be
3 ;; emitted before the shift to save the register value before it is
4 ;; clobbered. However, this copy is not needed if the register
5 ;; allocator turns the shift into an LEA. This also occurs for ADD.
7 ; Check that the shift gets turned into an LEA.
9 ; RUN: llvm-as < %s | llc -march=x86 -x86-asm-syntax=intel | not grep 'mov %E.X, %E.X'
11 ; FIXME: We need live variable information about flags to do this xform safely. :(
14 %G = external global int
16 int %test1(int %X, int %Y) {
18 volatile store int %Y, int* %G
19 volatile store int %Z, int* %G
24 %Z = add int %X, 1 ;; inc
25 volatile store int %Z, int* %G