34 lines
1.2 KiB
LLVM
34 lines
1.2 KiB
LLVM
|
; RUN: llc -O1 -regalloc=greedy -mtriple=x86_64-apple-macosx < %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
|
||
|
|
}
|