; RUN: llc -O1 -regalloc=greedy -mtriple=x86_64-apple-macosx -march x86-64 < %s -o - | FileCheck %s ; Check that last chance split (RAGreedy::tryInstructonSplit) just split ; when this is beneficial, otherwise we end up with uncoalesced copies. ; <rdar://problem/15570057> target datalayout = "e-i64:64-f80:128-s:64-n8:16:32:64-S128" @f = external constant void (i32)* ; CHECK-LABEL: test: ; Get the address of f in the GOT. ; CHECK: movq _f@{{[^,]+}}, [[F_ENTRY_ADDR:%[a-z0-9]+]] ; Read the actual address of f. ; CHECK: movq ([[F_ENTRY_ADDR]]), [[F_ADDR:%[a-z0-9]+]] ; Check that we do not have useless split points before each call. ; CHECK-NOT: movq ; CHECK: callq *[[F_ADDR]] ; Check that we do not have useless split points before each call. ; CHECK-NOT: movq ; CHECK: callq *[[F_ADDR]] ; Last call is a tail call, thus the address of the function cannot use ; a callee saved register. ; CHECK: movq [[F_ADDR]], [[F_ADDR_TC:%[a-z0-9]+]] ; CHECK: popq [[F_ADDR]] ; CHECK: jmpq *[[F_ADDR_TC]] define void @test(i32 %a, i32 %b, i32 %c) { entry: %fct_f = load void (i32)*, void (i32)** @f, align 8 tail call void %fct_f(i32 %a) tail call void %fct_f(i32 %b) tail call void %fct_f(i32 %c) ret void }