1 ; RUN: llc -O1 -regalloc=greedy -mtriple=x86_64-apple-macosx -march x86-64 < %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> 5 6 target datalayout = "e-i64:64-f80:128-s:64-n8:16:32:64-S128" 7 8 @f = external constant void (i32)* 9 10 ; CHECK-LABEL: test: 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. 16 ; CHECK-NOT: movq 17 ; CHECK: callq *[[F_ADDR]] 18 ; Check that we do not have useless split points before each call. 19 ; CHECK-NOT: movq 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) { 27 entry: 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) 32 ret void 33 } 34
