RPCS3/llvm-mirror
1
0
Fork 0
mirror of https://github.com/RPCS3/llvm-mirror.git synced 2025-01-31 12:41:49 +01:00
Code Issues Projects Releases Wiki Activity

[CodeGen][SimplifyCFG] Teach DwarfEHPrepare to preserve DomTree

Browse Source 
Once the default for SimplifyCFG flips, we can no longer pass nullptr
instead of DomTree to SimplifyCFG, so we need to propagate it here.

We don't strictly need to actually preserve DomTree in DwarfEHPrepare,
but we might as well do it, since it's trivial.
This commit is contained in:
Roman Lebedev 2021-01-01 20:27:09 +03:00
parent 8fbe47d101
commit 570b485d61
23 changed files with 83 additions and 45 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

52
lib/CodeGen/DwarfEHPrepare.cpp
View File

@ -15,6 +15,7 @@
#include "llvm/ADT/SmallVector.h"
#include "llvm/ADT/Statistic.h"
#include "llvm/Analysis/CFG.h"
#include "llvm/Analysis/DomTreeUpdater.h"
#include "llvm/Analysis/EHPersonalities.h"
#include "llvm/Analysis/TargetTransformInfo.h"
#include "llvm/CodeGen/RuntimeLibcalls.h"
@ -52,7 +53,7 @@ class DwarfEHPrepare {
Function &F;
const TargetLowering &TLI;
DominatorTree *DT;
DomTreeUpdater *DTU;
const TargetTransformInfo *TTI;
/// Return the exception object from the value passed into
@ -72,10 +73,10 @@ class DwarfEHPrepare {
public:
DwarfEHPrepare(CodeGenOpt::Level OptLevel_, FunctionCallee &RewindFunction_,
Function &F_, const TargetLowering &TLI_, DominatorTree *DT_,
Function &F_, const TargetLowering &TLI_, DomTreeUpdater *DTU_,
const TargetTransformInfo *TTI_)
: OptLevel(OptLevel_), RewindFunction(RewindFunction_), F(F_), TLI(TLI_),
DT(DT_), TTI(TTI_) {}
DTU(DTU_), TTI(TTI_) {}
bool run();
};
@ -122,11 +123,13 @@ Value *DwarfEHPrepare::GetExceptionObject(ResumeInst *RI) {
size_t DwarfEHPrepare::pruneUnreachableResumes(
SmallVectorImpl<ResumeInst *> &Resumes,
SmallVectorImpl<LandingPadInst *> &CleanupLPads) {
assert(DTU && "Should have DomTreeUpdater here.");
BitVector ResumeReachable(Resumes.size());
size_t ResumeIndex = 0;
for (auto *RI : Resumes) {
for (auto *LP : CleanupLPads) {
if (isPotentiallyReachable(LP, RI, nullptr, DT)) {
if (isPotentiallyReachable(LP, RI, nullptr, &DTU->getDomTree())) {
ResumeReachable.set(ResumeIndex);
break;
}
@ -150,7 +153,7 @@ size_t DwarfEHPrepare::pruneUnreachableResumes(
BasicBlock *BB = RI->getParent();
new UnreachableInst(Ctx, RI);
RI->eraseFromParent();
simplifyCFG(BB, *TTI);
simplifyCFG(BB, *TTI, DTU);
}
}
Resumes.resize(ResumesLeft);
@ -211,6 +214,9 @@ bool DwarfEHPrepare::InsertUnwindResumeCalls() {
return true;
}
std::vector<DominatorTree::UpdateType> Updates;
Updates.reserve(Resumes.size());
BasicBlock *UnwindBB = BasicBlock::Create(Ctx, "unwind_resume", &F);
PHINode *PN = PHINode::Create(Type::getInt8PtrTy(Ctx), ResumesLeft, "exn.obj",
UnwindBB);
@ -220,6 +226,7 @@ bool DwarfEHPrepare::InsertUnwindResumeCalls() {
for (ResumeInst *RI : Resumes) {
BasicBlock *Parent = RI->getParent();
BranchInst::Create(UnwindBB, Parent);
Updates.push_back({DominatorTree::Insert, Parent, UnwindBB});
Value *ExnObj = GetExceptionObject(RI);
PN->addIncoming(ExnObj, Parent);
@ -234,10 +241,39 @@ bool DwarfEHPrepare::InsertUnwindResumeCalls() {
// We never expect _Unwind_Resume to return.
CI->setDoesNotReturn();
new UnreachableInst(Ctx, UnwindBB);
if (DTU && RequireAndPreserveDomTree)
DTU->applyUpdatesPermissive(Updates);
return true;
}
bool DwarfEHPrepare::run() { return InsertUnwindResumeCalls(); }
bool DwarfEHPrepare::run() {
assert(((OptLevel == CodeGenOpt::None) ||
(DTU &&
DTU->getDomTree().verify(DominatorTree::VerificationLevel::Full))) &&
"Original domtree is invalid?");
bool Changed = InsertUnwindResumeCalls();
assert(((OptLevel == CodeGenOpt::None || !RequireAndPreserveDomTree) ||
(DTU &&
DTU->getDomTree().verify(DominatorTree::VerificationLevel::Full))) &&
"Original domtree is invalid?");
return Changed;
}
static bool prepareDwarfEH(CodeGenOpt::Level OptLevel,
FunctionCallee &RewindFunction, Function &F,
const TargetLowering &TLI, DominatorTree *DT,
const TargetTransformInfo *TTI) {
DomTreeUpdater DTU(DT, DomTreeUpdater::UpdateStrategy::Eager);
return DwarfEHPrepare(OptLevel, RewindFunction, F, TLI, DT ? &DTU : nullptr,
TTI)
.run();
};
namespace {
@ -263,7 +299,7 @@ public:
DT = &getAnalysis<DominatorTreeWrapperPass>().getDomTree();
TTI = &getAnalysis<TargetTransformInfoWrapperPass>().getTTI(F);
}
return DwarfEHPrepare(OptLevel, RewindFunction, F, TLI, DT, TTI).run();
return prepareDwarfEH(OptLevel, RewindFunction, F, TLI, DT, TTI);
}
void getAnalysisUsage(AnalysisUsage &AU) const override {
@ -272,6 +308,8 @@ public:
if (OptLevel != CodeGenOpt::None) {
AU.addRequired<DominatorTreeWrapperPass>();
AU.addRequired<TargetTransformInfoWrapperPass>();
if (RequireAndPreserveDomTree)
AU.addPreserved<DominatorTreeWrapperPass>();
}
}

4
test/CodeGen/AArch64/pic-eh-stubs.ll
View File

@ -1,5 +1,5 @@
; RUN: llc -mtriple=aarch64-none-linux-gnu -relocation-model=pic -simplifycfg-require-and-preserve-domtree=0 -o - %s | FileCheck %s
; RUN: llc -mtriple=aarch64_be-none-linux-gnu -relocation-model=pic -simplifycfg-require-and-preserve-domtree=0 -o - %s | FileCheck %s
; RUN: llc -mtriple=aarch64-none-linux-gnu -relocation-model=pic -simplifycfg-require-and-preserve-domtree=1 -o - %s | FileCheck %s
; RUN: llc -mtriple=aarch64_be-none-linux-gnu -relocation-model=pic -simplifycfg-require-and-preserve-domtree=1 -o - %s | FileCheck %s
; Make sure exception-handling PIC code can be linked correctly. An alternative
; to the sequence described below would have .gcc_except_table itself writable

2
test/CodeGen/ARM/2011-05-04-MultipleLandingPadSuccs.ll
View File

@ -1,4 +1,4 @@
; RUN: llc -simplifycfg-require-and-preserve-domtree=0 < %s -verify-machineinstrs
; RUN: llc -simplifycfg-require-and-preserve-domtree=1 < %s -verify-machineinstrs
; <rdar://problem/9187612>
target datalayout = "e-p:32:32:32-i1:8:32-i8:8:32-i16:16:32-i32:32:32-i64:32:32-f32:32:32-f64:32:32-v64:64:64-v128:128:128-a0:0:32-n32"

2
test/CodeGen/ARM/2014-05-14-DwarfEHCrash.ll
View File

@ -1,7 +1,7 @@
; Assertion `Encoding == DW_EH_PE_absptr && "Can handle absptr encoding only"' failed.
; Broken in r208166, fixed in 208715.
; RUN: llc -mtriple=arm-linux-androideabi -o - -filetype=asm -relocation-model=pic -simplifycfg-require-and-preserve-domtree=0 %s
; RUN: llc -mtriple=arm-linux-androideabi -o - -filetype=asm -relocation-model=pic -simplifycfg-require-and-preserve-domtree=1 %s
target datalayout = "e-m:e-p:32:32-i64:64-v128:64:128-n32-S64"
target triple = "armv4t--linux-androideabi"

2
test/CodeGen/ARM/arm-ttype-target2.ll
View File

@ -1,4 +1,4 @@
; RUN: llc -mtriple=armv7-none-linux-gnueabi -simplifycfg-require-and-preserve-domtree=0 < %s | FileCheck %s
; RUN: llc -mtriple=armv7-none-linux-gnueabi -simplifycfg-require-and-preserve-domtree=1 < %s | FileCheck %s
@_ZTVN10__cxxabiv117__class_type_infoE = external global i8*
@_ZTS3Foo = linkonce_odr constant [5 x i8] c"3Foo\00"

4
test/CodeGen/ARM/dwarf-eh.ll
View File

@ -1,6 +1,6 @@
; RUN: llc -mtriple=arm-netbsd-eabi -o - -filetype=asm -simplifycfg-require-and-preserve-domtree=0 %s | \
; RUN: llc -mtriple=arm-netbsd-eabi -o - -filetype=asm -simplifycfg-require-and-preserve-domtree=1 %s | \
; RUN: FileCheck %s
; RUN: llc -mtriple=arm-netbsd-eabi -o - -filetype=asm -simplifycfg-require-and-preserve-domtree=0 %s \
; RUN: llc -mtriple=arm-netbsd-eabi -o - -filetype=asm -simplifycfg-require-and-preserve-domtree=1 %s \
; RUN: -relocation-model=pic | FileCheck -check-prefix=CHECK-PIC %s
; ModuleID = 'test.cc'

2
test/CodeGen/ARM/ehabi-filters.ll
View File

@ -1,4 +1,4 @@
; RUN: llc -simplifycfg-require-and-preserve-domtree=0 < %s | FileCheck %s
; RUN: llc -simplifycfg-require-and-preserve-domtree=1 < %s | FileCheck %s
target datalayout = "e-p:32:32:32-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-v64:64:64-v128:64:128-a0:0:64-n32-S64"
target triple = "armv7-none-linux-gnueabi"

2
test/CodeGen/ARM/global-merge.ll
View File

@ -1,4 +1,4 @@
; RUN: llc -simplifycfg-require-and-preserve-domtree=0 < %s -mtriple=thumb-apple-darwin -arm-global-merge -global-merge-group-by-use=false -global-merge-on-const=true | FileCheck %s
; RUN: llc -simplifycfg-require-and-preserve-domtree=1 < %s -mtriple=thumb-apple-darwin -arm-global-merge -global-merge-group-by-use=false -global-merge-on-const=true | FileCheck %s
; Test the ARMGlobalMerge pass. Use -mtriple=thumb because it has a small
; value for the maximum offset (127).

6
test/CodeGen/ARM/setjmp_longjmp.ll
View File

@ -1,6 +1,6 @@
; RUN: llc -simplifycfg-require-and-preserve-domtree=0 %s -o - | FileCheck %s
; RUN: llc -mtriple=armv7-linux -exception-model sjlj -simplifycfg-require-and-preserve-domtree=0 %s -o - | FileCheck %s -check-prefix CHECK-LINUX
; RUN: llc -mtriple=thumbv7-win32 -exception-model sjlj -simplifycfg-require-and-preserve-domtree=0 %s -o - | FileCheck %s -check-prefix CHECK-WIN32
; RUN: llc -simplifycfg-require-and-preserve-domtree=1 %s -o - | FileCheck %s
; RUN: llc -mtriple=armv7-linux -exception-model sjlj -simplifycfg-require-and-preserve-domtree=1 %s -o - | FileCheck %s -check-prefix CHECK-LINUX
; RUN: llc -mtriple=thumbv7-win32 -exception-model sjlj -simplifycfg-require-and-preserve-domtree=1 %s -o - | FileCheck %s -check-prefix CHECK-WIN32
target triple = "armv7-apple-ios"
declare i32 @llvm.eh.sjlj.setjmp(i8*)

2
test/CodeGen/Hexagon/cfi_offset.ll
View File

@ -1,4 +1,4 @@
; RUN: llc -march=hexagon -simplifycfg-require-and-preserve-domtree=0 < %s | FileCheck %s
; RUN: llc -march=hexagon -simplifycfg-require-and-preserve-domtree=1 < %s | FileCheck %s
; CHECK: .cfi_def_cfa r30
; CHECK: .cfi_offset r31
; CHECK: .cfi_offset r30

2
test/CodeGen/Hexagon/ehabi.ll
View File

@ -1,4 +1,4 @@
; RUN: llc -march=hexagon -simplifycfg-require-and-preserve-domtree=0 < %s | FileCheck %s
; RUN: llc -march=hexagon -simplifycfg-require-and-preserve-domtree=1 < %s | FileCheck %s
; CHECK: GCC_except_table0:
; CHECK: Call site Encoding = uleb128

2
test/CodeGen/Hexagon/packetize-allocframe.ll
View File

@ -1,4 +1,4 @@
; RUN: llc -march=hexagon -O2 -simplifycfg-require-and-preserve-domtree=0 < %s | FileCheck %s
; RUN: llc -march=hexagon -O2 -simplifycfg-require-and-preserve-domtree=1 < %s | FileCheck %s
; The purpose of this test is to make sure that the packetizer is ignoring
; CFI instructions while forming packet for allocframe. Refer to 7d7d99622

2
test/CodeGen/PowerPC/2007-11-16-landingpad-split.ll
View File

@ -1,4 +1,4 @@
; RUN: llc -simplifycfg-require-and-preserve-domtree=0 < %s | FileCheck %s
; RUN: llc -simplifycfg-require-and-preserve-domtree=1 < %s | FileCheck %s
;; Formerly crashed, see PR 1508
target datalayout = "E-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:32:64-f32:32:32-f64:32:64-v64:64:64-v128:128:128-a0:0:64-f128:64:128"
target triple = "powerpc64-unknown-linux-gnu"

4
test/CodeGen/PowerPC/aix-exception.ll
View File

@ -1,9 +1,9 @@
; RUN: llc -verify-machineinstrs -mtriple powerpc-ibm-aix-xcoff -mcpu=pwr4 \
; RUN: -mattr=-altivec -simplifycfg-require-and-preserve-domtree=0 < %s | \
; RUN: -mattr=-altivec -simplifycfg-require-and-preserve-domtree=1 < %s | \
; RUN: FileCheck --check-prefixes=ASM,ASM32 %s
; RUN: llc -verify-machineinstrs -mtriple powerpc64-ibm-aix-xcoff -mcpu=pwr4 \
; RUN: -mattr=-altivec -simplifycfg-require-and-preserve-domtree=0 < %s | \
; RUN: -mattr=-altivec -simplifycfg-require-and-preserve-domtree=1 < %s | \
; RUN: FileCheck --check-prefixes=ASM,ASM64 %s
@_ZTIi = external constant i8*

8
test/CodeGen/SPARC/exception.ll
View File

@ -1,7 +1,7 @@
; RUN: llc -simplifycfg-require-and-preserve-domtree=0 < %s -march=sparc -relocation-model=static | FileCheck -check-prefix=V8ABS %s
; RUN: llc -simplifycfg-require-and-preserve-domtree=0 < %s -march=sparc -relocation-model=pic | FileCheck -check-prefix=V8PIC %s
; RUN: llc -simplifycfg-require-and-preserve-domtree=0 < %s -march=sparcv9 -relocation-model=static | FileCheck -check-prefix=V9ABS %s
; RUN: llc -simplifycfg-require-and-preserve-domtree=0 < %s -march=sparcv9 -relocation-model=pic | FileCheck -check-prefix=V9PIC %s
; RUN: llc -simplifycfg-require-and-preserve-domtree=1 < %s -march=sparc -relocation-model=static | FileCheck -check-prefix=V8ABS %s
; RUN: llc -simplifycfg-require-and-preserve-domtree=1 < %s -march=sparc -relocation-model=pic | FileCheck -check-prefix=V8PIC %s
; RUN: llc -simplifycfg-require-and-preserve-domtree=1 < %s -march=sparcv9 -relocation-model=static | FileCheck -check-prefix=V9ABS %s
; RUN: llc -simplifycfg-require-and-preserve-domtree=1 < %s -march=sparcv9 -relocation-model=pic | FileCheck -check-prefix=V9PIC %s
%struct.__fundamental_type_info_pseudo = type { %struct.__type_info_pseudo }

8
test/CodeGen/X86/2007-05-05-Personality.ll
View File

@ -1,7 +1,7 @@
; RUN: llc -simplifycfg-require-and-preserve-domtree=0 < %s -mtriple=i686-pc-linux-gnu -o - | FileCheck %s --check-prefix=LIN
; RUN: llc -simplifycfg-require-and-preserve-domtree=0 < %s -mtriple=i386-pc-mingw32 -o - | FileCheck %s --check-prefix=WIN
; RUN: llc -simplifycfg-require-and-preserve-domtree=0 < %s -mtriple=i686-pc-windows-gnu -o - | FileCheck %s --check-prefix=WIN
; RUN: llc -simplifycfg-require-and-preserve-domtree=0 < %s -mtriple=x86_64-pc-windows-gnu -o - | FileCheck %s --check-prefix=WIN64
; RUN: llc -simplifycfg-require-and-preserve-domtree=1 < %s -mtriple=i686-pc-linux-gnu -o - | FileCheck %s --check-prefix=LIN
; RUN: llc -simplifycfg-require-and-preserve-domtree=1 < %s -mtriple=i386-pc-mingw32 -o - | FileCheck %s --check-prefix=WIN
; RUN: llc -simplifycfg-require-and-preserve-domtree=1 < %s -mtriple=i686-pc-windows-gnu -o - | FileCheck %s --check-prefix=WIN
; RUN: llc -simplifycfg-require-and-preserve-domtree=1 < %s -mtriple=x86_64-pc-windows-gnu -o - | FileCheck %s --check-prefix=WIN64
; LIN: .cfi_personality 0, __gnat_eh_personality
; LIN: .cfi_lsda 0, .Lexception0

2
test/CodeGen/X86/2010-08-04-MingWCrash.ll
View File

@ -1,4 +1,4 @@
; RUN: llc -simplifycfg-require-and-preserve-domtree=0 < %s -mtriple=i386-pc-mingw32
; RUN: llc -simplifycfg-require-and-preserve-domtree=1 < %s -mtriple=i386-pc-mingw32
define void @func() nounwind personality i8* bitcast (i32 (...)* @__gxx_personality_v0 to i8*) {
invoke.cont:

2
test/CodeGen/X86/2012-01-10-UndefExceptionEdge.ll
View File

@ -1,4 +1,4 @@
; RUN: llc -simplifycfg-require-and-preserve-domtree=0 < %s -frame-pointer=all
; RUN: llc -simplifycfg-require-and-preserve-domtree=1 < %s -frame-pointer=all
target datalayout = "e-p:32:32:32-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:32:64-f32:32:32-f64:32:64-v64:64:64-v128:128:128-a0:0:64-f80:128:128-n8:16:32-S128"
target triple = "i386-apple-macosx10.7"

2
test/CodeGen/X86/basic-block-sections-eh.ll
View File

@ -1,5 +1,5 @@
; Check if landing pads are kept in a separate eh section
; RUN: llc -simplifycfg-require-and-preserve-domtree=0 < %s -mtriple=i386-unknown-linux-gnu -function-sections -basic-block-sections=all -unique-basic-block-section-names | FileCheck %s -check-prefix=LINUX-SECTIONS
; RUN: llc -simplifycfg-require-and-preserve-domtree=1 < %s -mtriple=i386-unknown-linux-gnu -function-sections -basic-block-sections=all -unique-basic-block-section-names | FileCheck %s -check-prefix=LINUX-SECTIONS
@_ZTIb = external dso_local constant i8*
define i32 @_Z3foob(i1 zeroext %0) #0 personality i8* bitcast (i32 (...)* @__gxx_personality_v0 to i8*) {

2
test/CodeGen/X86/code-model-kernel.ll
View File

@ -1,4 +1,4 @@
; RUN: llc -mtriple=x86_64-pc-linux-gnu -code-model=kernel -simplifycfg-require-and-preserve-domtree=0 %s -o - | FileCheck %s
; RUN: llc -mtriple=x86_64-pc-linux-gnu -code-model=kernel -simplifycfg-require-and-preserve-domtree=1 %s -o - | FileCheck %s
; CHECK-LABEL: main
; CHECK: .cfi_startproc
; CHECK: .cfi_personality 0, __gxx_personality_v0

2
test/CodeGen/X86/dwarf-eh-prepare.ll
View File

@ -1,4 +1,4 @@
; RUN: opt -mtriple=x86_64-linux-gnu -dwarfehprepare -simplifycfg-require-and-preserve-domtree=0 < %s -S | FileCheck %s
; RUN: opt -mtriple=x86_64-linux-gnu -dwarfehprepare -simplifycfg-require-and-preserve-domtree=1 < %s -S | FileCheck %s
; Check basic functionality of IR-to-IR DWARF EH preparation. This should
; eliminate resumes. This pass requires a TargetMachine, so we put it under X86

10
test/CodeGen/X86/gcc_except_table-multi.ll
View File

@ -1,10 +1,10 @@
; RUN: llc -simplifycfg-require-and-preserve-domtree=0 < %s -mtriple=x86_64 | FileCheck %s --check-prefixes=CHECK,NORMAL
; RUN: llc -simplifycfg-require-and-preserve-domtree=0 < %s -mtriple=x86_64 -unique-section-names=false | FileCheck %s --check-prefixes=CHECK,NOUNIQUE
; RUN: llc -simplifycfg-require-and-preserve-domtree=0 < %s -mtriple=x86_64 -function-sections | FileCheck %s --check-prefixes=CHECK,SEP
; RUN: llc -simplifycfg-require-and-preserve-domtree=0 < %s -mtriple=x86_64 -function-sections -unique-section-names=false | FileCheck %s --check-prefixes=CHECK,SEP_NOUNIQUE
; RUN: llc -simplifycfg-require-and-preserve-domtree=1 < %s -mtriple=x86_64 | FileCheck %s --check-prefixes=CHECK,NORMAL
; RUN: llc -simplifycfg-require-and-preserve-domtree=1 < %s -mtriple=x86_64 -unique-section-names=false | FileCheck %s --check-prefixes=CHECK,NOUNIQUE
; RUN: llc -simplifycfg-require-and-preserve-domtree=1 < %s -mtriple=x86_64 -function-sections | FileCheck %s --check-prefixes=CHECK,SEP
; RUN: llc -simplifycfg-require-and-preserve-domtree=1 < %s -mtriple=x86_64 -function-sections -unique-section-names=false | FileCheck %s --check-prefixes=CHECK,SEP_NOUNIQUE
;; Don't use `,unique` if GNU as<2.35.
; RUN: llc -simplifycfg-require-and-preserve-domtree=0 < %s -mtriple=x86_64 -function-sections -unique-section-names=false -no-integrated-as | FileCheck %s --check-prefixes=CHECK,SEP_NOUNIQUE_GAS
; RUN: llc -simplifycfg-require-and-preserve-domtree=1 < %s -mtriple=x86_64 -function-sections -unique-section-names=false -no-integrated-as | FileCheck %s --check-prefixes=CHECK,SEP_NOUNIQUE_GAS
@_ZTIi = external constant i8*

4
test/CodeGen/X86/indirect-branch-tracking-eh2.ll
View File

@ -1,5 +1,5 @@
; RUN: llc -mtriple x86_64-unknown-unknown -exception-model sjlj -verify-machineinstrs=0 -simplifycfg-require-and-preserve-domtree=0 < %s | FileCheck %s --check-prefix=NUM
; RUN: llc -mtriple x86_64-unknown-unknown -exception-model sjlj -verify-machineinstrs=0 -simplifycfg-require-and-preserve-domtree=0 < %s | FileCheck %s --check-prefix=SJLJ
; RUN: llc -mtriple x86_64-unknown-unknown -exception-model sjlj -verify-machineinstrs=0 -simplifycfg-require-and-preserve-domtree=1 < %s | FileCheck %s --check-prefix=NUM
; RUN: llc -mtriple x86_64-unknown-unknown -exception-model sjlj -verify-machineinstrs=0 -simplifycfg-require-and-preserve-domtree=1 < %s | FileCheck %s --check-prefix=SJLJ
; NUM-COUNT-3: endbr64