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llvm-project/llvm/test/CodeGen/X86/expand-call-rvmarker.mir

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[X86] Lower calls with clang.arc.attachedcall bundle This patch adds support for lowering function calls with the `clang.arc.attachedcall` bundle. The goal is to expand such calls to the following sequence of instructions: callq @fn movq %rax, %rdi callq _objc_retainAutoreleasedReturnValue / _objc_unsafeClaimAutoreleasedReturnValue This sequence of instructions triggers Objective-C runtime optimizations, hence we want to ensure no instructions get moved in between them. This patch achieves that by adding a new CALL_RVMARKER ISD node, which gets turned into the CALL64_RVMARKER pseudo, which eventually gets expanded into the sequence mentioned above. The ObjC runtime function to call is determined by the argument in the bundle, which is passed through as a target constant to the pseudo. @ahatanak is working on using this attribute in the front- & middle-end. Together with the front- & middle-end changes, this should address PR31925 for X86. This is the X86 version of 46bc40e50246c1902a1ca7916c8286cb837643ee, which added similar support for AArch64. Reviewed By: ab Differential Revision: https://reviews.llvm.org/D94597
2021-05-21 22:58:35 +08:00
# RUN: llc -o - -run-pass=x86-pseudo -verify-machineinstrs %s | FileCheck %s
--- |
target datalayout = "e-m:o-p270:32:32-p271:32:32-p272:64:64-i64:64-f80:128-n8:16:32:64-S128"
target triple = "x86_64-apple-macosx11.0.0"
declare i8* @objc_retainAutoreleasedReturnValue(i8*)
declare i8* @objc_unsafeClaimAutoreleasedReturnValue(i8*)
declare i8* @fn()
define void @test_objc_retainAutoreleaseReturnedValue() {
ret void
}
define void @test_objc_unsafeClaimAutoreleasedReturnValue() {
ret void
}
define void @test_objc_unsafeClaimAutoreleasedReturnValue_2_args() {
ret void
}
define void @test_ret_void() {
ret void
}
...
---
# CHECK-LABEL: name: test_objc_retainAutoreleaseReturnedValue
# CHECK: bb.0
# CHECK-NEXT: frame-setup PUSH64r undef $rax, implicit-def $rsp, implicit $rsp
# CHECK-NEXT: CFI_INSTRUCTION def_cfa_offset 16
# CHECK-NEXT: CALL64pcrel32 @fn, csr_64, implicit $rsp, implicit $ssp, implicit $rsp, implicit $ssp, implicit-def $rsp, implicit-def $ssp, implicit-def $rax
# CHECK-NEXT: $rdi = MOV64rr $rax
# CHECK-NEXT: CALL64pcrel32 @objc_retainAutoreleasedReturnValue, csr_64, implicit $rsp, implicit $ssp, implicit-def $rax
# CHECK-NEXT: $rcx = frame-destroy POP64r implicit-def $rsp, implicit $rsp
# CHECK-NEXT: RETQ
#
name: test_objc_retainAutoreleaseReturnedValue
alignment: 16
tracksRegLiveness: true
frameInfo:
stackSize: 8
offsetAdjustment: -8
maxAlignment: 1
adjustsStack: true
hasCalls: true
maxCallFrameSize: 0
machineFunctionInfo: {}
body: |
bb.0 (%ir-block.0):
frame-setup PUSH64r undef $rax, implicit-def $rsp, implicit $rsp
CFI_INSTRUCTION def_cfa_offset 16
CALL64pcrel32_RVMARKER 0, @fn, csr_64, implicit $rsp, implicit $ssp, implicit-def $rsp, implicit-def $ssp, implicit-def $rax
$rcx = frame-destroy POP64r implicit-def $rsp, implicit $rsp
RET 0, $rax
...
---
# CHECK-LABEL: name: test_objc_unsafeClaimAutoreleasedReturnValue
# CHECK: bb.0
# CHECK-NEXT: frame-setup PUSH64r undef $rax, implicit-def $rsp, implicit $rsp
# CHECK-NEXT: CFI_INSTRUCTION def_cfa_offset 16
# CHECK-NEXT: CALL64pcrel32 @fn, csr_64, implicit $rsp, implicit $ssp, implicit $rsp, implicit $ssp, implicit-def $rsp, implicit-def $ssp, implicit-def $rax
# CHECK-NEXT: $rdi = MOV64rr $rax
# CHECK-NEXT: CALL64pcrel32 @objc_unsafeClaimAutoreleasedReturnValue, csr_64, implicit $rsp, implicit $ssp, implicit-def $rax
# CHECK-NEXT: $rcx = frame-destroy POP64r implicit-def $rsp, implicit $rsp
# CHECK-NEXT: RETQ
#
name: test_objc_unsafeClaimAutoreleasedReturnValue
alignment: 16
tracksRegLiveness: true
frameInfo:
stackSize: 8
offsetAdjustment: -8
maxAlignment: 1
adjustsStack: true
hasCalls: true
maxCallFrameSize: 0
machineFunctionInfo: {}
body: |
bb.0 (%ir-block.0):
frame-setup PUSH64r undef $rax, implicit-def $rsp, implicit $rsp
CFI_INSTRUCTION def_cfa_offset 16
CALL64pcrel32_RVMARKER 1, @fn, csr_64, implicit $rsp, implicit $ssp, implicit-def $rsp, implicit-def $ssp, implicit-def $rax
$rcx = frame-destroy POP64r implicit-def $rsp, implicit $rsp
RET 0, $rax
...
---
# CHECK-LABEL: name: test_objc_unsafeClaimAutoreleasedReturnValue_2_args
# CHECK: bb.0
# CHECK: frame-setup PUSH64r undef $rax, implicit-def $rsp, implicit $rsp
# CHECK-NEXT: $rax = MOV64rr $rdi
# CHECK-NEXT: $rdi = MOV64rr killed $rdx
# CHECK-NEXT: $rdx = MOV64rr killed $rax
# CHECK-NEXT: CALL64pcrel32 @fn, csr_64, implicit $rsp, implicit $ssp, implicit $rsp, implicit $ssp, implicit $rdi, implicit $rsi, implicit $rdx, implicit-def $rsp, implicit-def $ssp, implicit-def $rax
# CHECK-NEXT: $rdi = MOV64rr $rax
# CHECK-NEXT: CALL64pcrel32 @objc_retainAutoreleasedReturnValue, csr_64, implicit $rsp, implicit $ssp, implicit-def dead $rax
# CHECK-NEXT: $rax = frame-destroy POP64r implicit-def $rsp, implicit $rsp
# CHECK-NEXT: RETQ
#
name: test_objc_unsafeClaimAutoreleasedReturnValue_2_args
alignment: 16
tracksRegLiveness: true
frameInfo:
stackSize: 8
offsetAdjustment: -8
maxAlignment: 1
adjustsStack: true
hasCalls: true
maxCallFrameSize: 0
machineFunctionInfo: {}
body: |
bb.0 (%ir-block.0):
liveins: $rdi, $rdx, $rsi
frame-setup PUSH64r undef $rax, implicit-def $rsp, implicit $rsp
$rax = MOV64rr $rdi
$rdi = MOV64rr killed $rdx
$rdx = MOV64rr killed $rax
CALL64pcrel32_RVMARKER 0, @fn, csr_64, implicit $rsp, implicit $ssp, implicit $rdi, implicit $rsi, implicit $rdx, implicit-def $rsp, implicit-def $ssp, implicit-def dead $rax
$rax = frame-destroy POP64r implicit-def $rsp, implicit $rsp
RET 0, $rax
...
# CHECK-LABEL: name: test_ret_void
# CHECK: bb.0
# CHECK-NEXT: frame-setup PUSH64r undef $rax, implicit-def $rsp, implicit $rsp
# CHECK-NEXT: CFI_INSTRUCTION def_cfa_offset 16
# CHECK-NEXT: CALL64pcrel32 @fn, csr_64, implicit $rsp, implicit $ssp, implicit $rsp, implicit $ssp, implicit-def $rsp, implicit-def $ssp, implicit-def $rax
# CHECK-NEXT: $rdi = MOV64rr $rax
# CHECK-NEXT: CALL64pcrel32 @objc_retainAutoreleasedReturnValue, csr_64, implicit $rsp, implicit $ssp, implicit-def dead $rax
# CHECK-NEXT: $rax = frame-destroy POP64r implicit-def $rsp, implicit $rsp
# CHECK-NEXT: RETQ
#
name: test_ret_void
alignment: 16
tracksRegLiveness: true
frameInfo:
stackSize: 8
offsetAdjustment: -8
maxAlignment: 1
adjustsStack: true
hasCalls: true
maxCallFrameSize: 0
machineFunctionInfo: {}
body: |
bb.0 (%ir-block.0):
frame-setup PUSH64r undef $rax, implicit-def $rsp, implicit $rsp
CFI_INSTRUCTION def_cfa_offset 16
CALL64pcrel32_RVMARKER 0, @fn, csr_64, implicit $rsp, implicit $ssp, implicit-def $rsp, implicit-def $ssp, implicit-def dead $rax
$rax = frame-destroy POP64r implicit-def $rsp, implicit $rsp
RET 0