cabefea2ec
The "packed epilog" form only implies that the epilog is located exactly at the end of the function (so the location of the epilog is implicit from the epilog opcodes), but it doesn't have to share opcodes with the prolog - as long as the total number of opcode bytes and the offset to the epilog fit within the bitfields. This avoids writing a 4 byte epilog scope in many cases. (I haven't measured how much this shrinks actual xdata sections in practice though.) Differential Revision: https://reviews.llvm.org/D125536
219 lines
9.7 KiB
YAML
219 lines
9.7 KiB
YAML
# RUN: llc -o - %s -mtriple=aarch64-windows -start-after=prologepilog \
|
|
# RUN: -filetype=obj | llvm-readobj --unwind - | FileCheck %s
|
|
|
|
# Check that that the large stack allocation is correctly represented in .xdata.
|
|
|
|
# CHECK: ExceptionData {
|
|
# CHECK-NEXT: FunctionLength: 156
|
|
# CHECK-NEXT: Version: 0
|
|
# CHECK-NEXT: ExceptionData: No
|
|
# CHECK-NEXT: EpiloguePacked: Yes
|
|
# CHECK-NEXT: EpilogueOffset: 10
|
|
# CHECK-NEXT: ByteCodeLength: 20
|
|
# CHECK-NEXT: Prologue [
|
|
# CHECK-NEXT: 0xe002dac9 ; sub sp, #2993296
|
|
# CHECK-NEXT: 0xe3 ; nop
|
|
# CHECK-NEXT: 0xe3 ; nop
|
|
# CHECK-NEXT: 0x42 ; stp x29, x30, [sp, #16]
|
|
# CHECK-NEXT: 0xd53f ; str x28, [sp, #-256]!
|
|
# CHECK-NEXT: 0xe4 ; end
|
|
# CHECK-NEXT: ]
|
|
# CHECK-NEXT: Epilogue [
|
|
# CHECK-NEXT: 0xe002da00 ; add sp, #2990080
|
|
# CHECK-NEXT: 0xc0c9 ; add sp, #3216
|
|
# CHECK-NEXT: 0x42 ; ldp x29, x30, [sp, #16]
|
|
# CHECK-NEXT: 0xd53f ; ldr x28, [sp], #256
|
|
# CHECK-NEXT: 0xe4 ; end
|
|
# CHECK-NEXT: ]
|
|
# CHECK-NEXT: }
|
|
|
|
|
|
--- |
|
|
target datalayout = "e-m:w-p:64:64-i32:32-i64:64-i128:128-n32:64-S128"
|
|
target triple = "aarch64-unknown-windows-msvc19.11.0"
|
|
|
|
; Function Attrs: noinline optnone
|
|
define dso_local i32 @"?func@@YAHH@Z"(i32 %i) #0 {
|
|
entry:
|
|
%retval = alloca i32, align 4
|
|
%i.addr = alloca i32, align 4
|
|
%A = alloca [748193 x i32], align 4
|
|
%a = alloca i32, align 4
|
|
%B = alloca [123 x i32], align 4
|
|
store i32 %i, i32* %i.addr, align 4
|
|
%0 = load i32, i32* %i.addr, align 4
|
|
%add = add nsw i32 %0, 2
|
|
store i32 %add, i32* %a, align 4
|
|
%call = call i32 @"?func2@@YAHXZ"()
|
|
%1 = load i32, i32* %i.addr, align 4
|
|
%cmp = icmp sgt i32 %1, 2
|
|
br i1 %cmp, label %if.then, label %if.else
|
|
|
|
if.then: ; preds = %entry
|
|
%call1 = call i32 @"?func2@@YAHXZ"()
|
|
store i32 %call1, i32* %retval, align 4
|
|
br label %return
|
|
|
|
if.else: ; preds = %entry
|
|
%arraydecay = getelementptr inbounds [123 x i32], [123 x i32]* %B, i32 0, i32 0
|
|
%call2 = call i32 @"?func3@@YAHPEAH@Z"(i32* %arraydecay)
|
|
store i32 %call2, i32* %retval, align 4
|
|
br label %return
|
|
|
|
return: ; preds = %if.else, %if.then
|
|
%2 = load i32, i32* %retval, align 4
|
|
ret i32 %2
|
|
}
|
|
|
|
declare dso_local i32 @"?func2@@YAHXZ"() #1
|
|
|
|
declare dso_local i32 @"?func3@@YAHPEAH@Z"(i32*) #1
|
|
|
|
; Function Attrs: nounwind
|
|
declare void @llvm.stackprotector(i8*, i8**) #2
|
|
|
|
attributes #0 = { noinline optnone "correctly-rounded-divide-sqrt-fp-math"="false" "disable-tail-calls"="false" "less-precise-fpmad"="false" "frame-pointer"="none" "no-infs-fp-math"="false" "no-jump-tables"="false" "no-nans-fp-math"="false" "no-signed-zeros-fp-math"="false" "no-trapping-math"="false" "stack-protector-buffer-size"="8" "target-cpu"="generic" "target-features"="+neon" "unsafe-fp-math"="false" "use-soft-float"="false" }
|
|
attributes #1 = { "correctly-rounded-divide-sqrt-fp-math"="false" "disable-tail-calls"="false" "less-precise-fpmad"="false" "frame-pointer"="none" "no-infs-fp-math"="false" "no-nans-fp-math"="false" "no-signed-zeros-fp-math"="false" "no-trapping-math"="false" "stack-protector-buffer-size"="8" "target-cpu"="generic" "target-features"="+neon" "unsafe-fp-math"="false" "use-soft-float"="false" }
|
|
attributes #2 = { nounwind }
|
|
|
|
!llvm.module.flags = !{!0}
|
|
|
|
!0 = !{i32 1, !"wchar_size", i32 2}
|
|
|
|
...
|
|
---
|
|
name: '?func@@YAHH@Z'
|
|
alignment: 4
|
|
exposesReturnsTwice: false
|
|
legalized: true
|
|
regBankSelected: true
|
|
selected: true
|
|
failedISel: false
|
|
tracksRegLiveness: true
|
|
hasWinCFI: true
|
|
registers:
|
|
liveins:
|
|
frameInfo:
|
|
isFrameAddressTaken: false
|
|
isReturnAddressTaken: false
|
|
hasStackMap: false
|
|
hasPatchPoint: false
|
|
stackSize: 2993328
|
|
offsetAdjustment: 0
|
|
maxAlignment: 16
|
|
adjustsStack: true
|
|
hasCalls: true
|
|
stackProtector: ''
|
|
maxCallFrameSize: 0
|
|
hasOpaqueSPAdjustment: false
|
|
hasVAStart: false
|
|
hasMustTailInVarArgFunc: false
|
|
localFrameSize: 2993276
|
|
savePoint: ''
|
|
restorePoint: ''
|
|
fixedStack:
|
|
stack:
|
|
- { id: 0, name: retval, type: default, offset: -36, size: 4, alignment: 4,
|
|
stack-id: default, callee-saved-register: '', callee-saved-restored: true,
|
|
local-offset: -4, debug-info-variable: '', debug-info-expression: '',
|
|
debug-info-location: '' }
|
|
- { id: 1, name: i.addr, type: default, offset: -40, size: 4, alignment: 4,
|
|
stack-id: default, callee-saved-register: '', callee-saved-restored: true,
|
|
local-offset: -8, debug-info-variable: '', debug-info-expression: '',
|
|
debug-info-location: '' }
|
|
- { id: 2, name: A, type: default, offset: -2992812, size: 2992772, alignment: 4,
|
|
stack-id: default, callee-saved-register: '', callee-saved-restored: true,
|
|
local-offset: -2992780, debug-info-variable: '', debug-info-expression: '',
|
|
debug-info-location: '' }
|
|
- { id: 3, name: a, type: default, offset: -2992816, size: 4, alignment: 4,
|
|
stack-id: default, callee-saved-register: '', callee-saved-restored: true,
|
|
local-offset: -2992784, debug-info-variable: '', debug-info-expression: '',
|
|
debug-info-location: '' }
|
|
- { id: 4, name: B, type: default, offset: -2993308, size: 492, alignment: 4,
|
|
stack-id: default, callee-saved-register: '', callee-saved-restored: true,
|
|
local-offset: -2993276, debug-info-variable: '', debug-info-expression: '',
|
|
debug-info-location: '' }
|
|
- { id: 5, name: '', type: spill-slot, offset: -2993320, size: 8, alignment: 8,
|
|
stack-id: default, callee-saved-register: '', callee-saved-restored: true,
|
|
debug-info-variable: '', debug-info-expression: '', debug-info-location: '' }
|
|
- { id: 6, name: '', type: spill-slot, offset: -2993324, size: 4, alignment: 4,
|
|
stack-id: default, callee-saved-register: '', callee-saved-restored: true,
|
|
debug-info-variable: '', debug-info-expression: '', debug-info-location: '' }
|
|
- { id: 7, name: '', type: spill-slot, offset: -8, size: 8, alignment: 8,
|
|
stack-id: default, callee-saved-register: '$fp', callee-saved-restored: true,
|
|
debug-info-variable: '', debug-info-expression: '', debug-info-location: '' }
|
|
- { id: 8, name: '', type: spill-slot, offset: -16, size: 8, alignment: 8,
|
|
stack-id: default, callee-saved-register: '$lr', callee-saved-restored: true,
|
|
debug-info-variable: '', debug-info-expression: '', debug-info-location: '' }
|
|
- { id: 9, name: '', type: spill-slot, offset: -32, size: 8, alignment: 16,
|
|
stack-id: default, callee-saved-register: '$x28', callee-saved-restored: true,
|
|
debug-info-variable: '', debug-info-expression: '', debug-info-location: '' }
|
|
constants:
|
|
body: |
|
|
bb.1.entry:
|
|
successors: %bb.2(0x40000000), %bb.3(0x40000000)
|
|
liveins: $w0, $x28, $fp, $lr
|
|
|
|
early-clobber $sp = frame-setup STRXpre killed $x28, $sp, -32 :: (store (s64) into %stack.9)
|
|
frame-setup SEH_SaveReg_X 28, -256
|
|
frame-setup STPXi killed $fp, killed $lr, $sp, 2 :: (store (s64) into %stack.7), (store (s64) into %stack.8)
|
|
frame-setup SEH_SaveFPLR 16
|
|
$x15 = frame-setup MOVi64imm 187081
|
|
frame-setup SEH_Nop
|
|
frame-setup BL &__chkstk, implicit-def $lr, implicit $sp, implicit $x15
|
|
frame-setup SEH_Nop
|
|
$sp = frame-setup SUBXrx64 killed $sp, killed $x15, 28
|
|
frame-setup SEH_StackAlloc 2993296
|
|
frame-setup SEH_PrologEnd
|
|
$x8 = ADDXri $sp, 730, 12
|
|
$x8 = ADDXri $x8, 3208, 0
|
|
renamable $w9 = MOVi32imm 2
|
|
STRWui killed renamable $w0, renamable $x8, 0 :: (store (s32) into %ir.i.addr)
|
|
renamable $w0 = LDRWui renamable $x8, 0 :: (load (s32) from %ir.i.addr)
|
|
renamable $w0 = ADDWri killed renamable $w0, 2, 0
|
|
STRWui killed renamable $w0, $sp, 128 :: (store (s32) into %ir.a)
|
|
STRXui killed $x8, $sp, 1 :: (store (s64) into %stack.5)
|
|
STRWui killed $w9, $sp, 1 :: (store (s32) into %stack.6)
|
|
BL @"?func2@@YAHXZ", csr_aarch64_aapcs, implicit-def $lr, implicit $sp, implicit-def $w0
|
|
$x8 = LDRXui $sp, 1 :: (load (s64) from %stack.5)
|
|
renamable $w9 = LDRWui killed renamable $x8, 0 :: (load (s32) from %ir.i.addr)
|
|
$w10 = LDRWui $sp, 1 :: (load (s32) from %stack.6)
|
|
$wzr = SUBSWrr killed renamable $w9, killed renamable $w10, implicit-def $nzcv
|
|
renamable $w9 = CSINCWr $wzr, $wzr, 13, implicit $nzcv
|
|
TBNZW killed renamable $w9, 0, %bb.2
|
|
B %bb.3
|
|
|
|
bb.2.if.then:
|
|
successors: %bb.4(0x80000000)
|
|
|
|
BL @"?func2@@YAHXZ", csr_aarch64_aapcs, implicit-def $lr, implicit $sp, implicit-def $w0
|
|
$x8 = LDRXui $sp, 1 :: (load (s64) from %stack.5)
|
|
STRWui killed renamable $w0, killed renamable $x8, 1 :: (store (s32) into %ir.retval)
|
|
B %bb.4
|
|
|
|
bb.3.if.else:
|
|
successors: %bb.4(0x80000000)
|
|
|
|
$x8 = ADDXri $sp, 20, 0
|
|
$x0 = COPY killed renamable $x8
|
|
BL @"?func3@@YAHPEAH@Z", csr_aarch64_aapcs, implicit-def $lr, implicit $sp, implicit killed $x0, implicit-def $w0
|
|
$x8 = LDRXui $sp, 1 :: (load (s64) from %stack.5)
|
|
STRWui killed renamable $w0, killed renamable $x8, 1 :: (store (s32) into %ir.retval)
|
|
|
|
bb.4.return:
|
|
$x8 = LDRXui $sp, 1 :: (load (s64) from %stack.5)
|
|
renamable $w0 = LDRWui killed renamable $x8, 1 :: (load (s32) from %ir.retval)
|
|
frame-destroy SEH_EpilogStart
|
|
$sp = frame-destroy ADDXri $sp, 730, 12
|
|
frame-destroy SEH_StackAlloc 2990080
|
|
$sp = frame-destroy ADDXri $sp, 3216, 0
|
|
frame-destroy SEH_StackAlloc 3216
|
|
$fp, $lr = frame-destroy LDPXi $sp, 2 :: (load (s64) from %stack.7), (load (s64) from %stack.8)
|
|
frame-destroy SEH_SaveFPLR 16
|
|
early-clobber $sp, $x28 = frame-destroy LDRXpost $sp, 32 :: (load (s64) from %stack.9)
|
|
frame-destroy SEH_SaveReg_X 28, -256
|
|
frame-destroy SEH_EpilogEnd
|
|
RET_ReallyLR implicit killed $w0
|
|
|
|
...
|