1 ; RUN: llc -O1 -regalloc=greedy -mtriple=x86_64-apple-macosx < %s -o - | FileCheck %s
2 ; Check that last chance split (RAGreedy::tryInstructonSplit) just split
3 ; when this is beneficial, otherwise we end up with uncoalesced copies.
4 ; <rdar://problem/15570057>
6 target datalayout = "e-i64:64-f80:128-s:64-n8:16:32:64-S128"
8 @f = external constant void (i32)*
11 ; Get the address of f in the GOT.
12 ; CHECK: movq _f@{{[^,]+}}, [[F_ENTRY_ADDR:%[a-z0-9]+]]
13 ; Read the actual address of f.
14 ; CHECK: movq ([[F_ENTRY_ADDR]]), [[F_ADDR:%[a-z0-9]+]]
15 ; Check that we do not have useless split points before each call.
17 ; CHECK: callq *[[F_ADDR]]
18 ; Check that we do not have useless split points before each call.
20 ; CHECK: callq *[[F_ADDR]]
21 ; Last call is a tail call, thus the address of the function cannot use
22 ; a callee saved register.
23 ; CHECK: movq [[F_ADDR]], [[F_ADDR_TC:%[a-z0-9]+]]
24 ; CHECK: popq [[F_ADDR]]
25 ; CHECK: jmpq *[[F_ADDR_TC]]
26 define void @test(i32 %a, i32 %b, i32 %c) {
28 %fct_f = load void (i32)*, void (i32)** @f, align 8
29 tail call void %fct_f(i32 %a)
30 tail call void %fct_f(i32 %b)
31 tail call void %fct_f(i32 %c)