This patch fixes issue with lowering below mentioned pattern :-

_foo:
        smull	 r0, r1, r1, r0
	smull	 r2, r3, r3, r2
	adds	r0, r2, r0
	adc	r1, r3, r1
	bx	lr

to

_foo:
        smull	 r0, r1, r1, r0
	smlal	 r0, r1, r3, r2
	bx	lr

llvm-svn: 226904