blah.txt

(cmpt379)thinkpad[/tmp/llvm_test] python test.py 
; ModuleID = 'tut2'

define i32 @gcd(i32 %x, i32 %y) {
entry:
  %tmp = icmp eq i32 %x, %y
  br i1 %tmp, label %return, label %cond_false

return:                                           ; preds = %entry
  ret i32 %x

cond_false:                                       ; preds = %entry
  %tmp1 = icmp ult i32 %x, %y
  br i1 %tmp1, label %cond_true, label %cond_false_2

cond_true:                                        ; preds = %cond_false
  %tmp2 = sub i32 %y, %x
  %tmp3 = call i32 @gcd(i32 %x, i32 %tmp2)
  ret i32 %tmp3

cond_false_2:                                     ; preds = %cond_false
  %x_sub_y = sub i32 %x, %y
  %tmp4 = call i32 @gcd(i32 %x_sub_y, i32 %y)
  ret i32 %tmp4
}

(cmpt379)thinkpad[/tmp/llvm_test] python test.py | llc
	.file	"<stdin>"
	.text
	.globl	gcd
	.align	16, 0x90
	.type	gcd,@function
gcd:                                    # @gcd
	.cfi_startproc
# BB#0:                                 # %entry
	pushq	%rax
.Ltmp1:
	.cfi_def_cfa_offset 16
	movl	%edi, %eax
	subl	%esi, %eax
	jne	.LBB0_1
# BB#5:                                 # %return
	movl	%edi, %eax
	popq	%rdx
	ret
.LBB0_1:                                # %cond_false
	jae	.LBB0_4
# BB#2:                                 # %cond_true
	subl	%edi, %esi
	jmp	.LBB0_3
.LBB0_4:                                # %cond_false_2
	movl	%eax, %edi
.LBB0_3:                                # %cond_true
	callq	gcd
	popq	%rdx
	ret
.Ltmp2:
	.size	gcd, .Ltmp2-gcd
	.cfi_endproc


	.section	".note.GNU-stack","",@progbits