ojhunt wrote:
Actually I've given this a lot of thought, I think we should not consider
explicitly __ptrauth qualified types to be relocatable, how does that sound?
https://github.com/llvm/llvm-project/pull/143969
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ojhunt wrote:
found how to unmark the approval as the next update will change this fairly
substantially
https://github.com/llvm/llvm-project/pull/143969
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@@ -1,5 +1,5 @@
// RUN: cp %s %t
-// RUN: %clang_cc1 -x c++ -Wunused-lambda-capture -Wno-unused-value -std=c++1z
-fixit %t
+// RUN: %clang_cc1 -x c++ -Wno-vla-cxx-extension -Wunused-lambda-capture
-Wno-unused-value -std=c++1z -fixit %t
ojhunt wrote:
ah no, th
@@ -7676,10 +7676,26 @@ CGObjCNonFragileABIMac::GetInterfaceEHType(const
ObjCInterfaceDecl *ID,
}
llvm::Value *VTableIdx = llvm::ConstantInt::get(CGM.Int32Ty, 2);
+ llvm::Constant *VTablePtr = llvm::ConstantExpr::getInBoundsGetElementPtr(
+ VTableGV->getValueType(),
ojhunt wrote:
I don't understand the windows failure (ninja says there was a failure, but I
cannot find any failure in the log?)
I'm also confused by the documentation failure: it's not telling me what/where
the error is coming from.
https://github.com/llvm/llvm-project/pull/141148
__
https://github.com/ojhunt updated
https://github.com/llvm/llvm-project/pull/141148
>From 0db205bb8f6925dd725885395f58a688000c7b8b Mon Sep 17 00:00:00 2001
From: Oliver Hunt
Date: Thu, 22 May 2025 02:38:26 -0700
Subject: [PATCH 1/5] [clang] Correct FixIt ranges for unused capture warnings
Fixes
https://github.com/ojhunt edited
https://github.com/llvm/llvm-project/pull/135562
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@@ -3074,6 +3074,39 @@ following way:
Query for this feature with ``__has_builtin(__builtin_offsetof)``.
+``__builtin_get_vtable_pointer``
+
+
+``__builtin_get_vtable_pointer`` loads and authenticates the primary vtable
+pointer from an instanc
ojhunt wrote:
> Documentation failure says:
>
> Warning, treated as error:
> /home/runner/work/llvm-project/llvm-project/clang-build/tools/clang/docs/DiagnosticsReference.rst:18009:Unexpected
> indentation.
Right, but I don't know how/what is causing the failure as I haven't changed
any dia
https://github.com/ojhunt updated
https://github.com/llvm/llvm-project/pull/141148
>From 0db205bb8f6925dd725885395f58a688000c7b8b Mon Sep 17 00:00:00 2001
From: Oliver Hunt
Date: Thu, 22 May 2025 02:38:26 -0700
Subject: [PATCH 1/5] [clang] Correct FixIt ranges for unused capture warnings
Fixes
ojhunt wrote:
I can't reproduce this locally so I've ensured my tree is up to date and
pushing again to see if it fails again
https://github.com/llvm/llvm-project/pull/141148
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ojhunt wrote:
this is tripping on CI and my machine.
To repro I need to delete `$BUILD_DIR/tools/clang/docs` and build with `TZ=UTC
ninja docs-clang-man`
I find it necessary to delete the doc directory to trigger this.
https://github.com/llvm/llvm-project/pull/142387
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ojhunt wrote:
The docs failure is #142387
https://github.com/llvm/llvm-project/pull/141148
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@@ -1825,6 +1825,37 @@ static ExprResult PointerAuthStringDiscriminator(Sema
&S, CallExpr *Call) {
return Call;
}
+static ExprResult GetVTablePointer(Sema &S, CallExpr *Call) {
+ if (S.checkArgCount(Call, 1))
+return ExprError();
+ ExprResult ThisArg = S.DefaultFuncti
https://github.com/ojhunt updated
https://github.com/llvm/llvm-project/pull/139790
>From a933679801bde89b53584c4c65118658477db4da Mon Sep 17 00:00:00 2001
From: Oliver Hunt
Date: Tue, 13 May 2025 13:35:55 -0700
Subject: [PATCH 1/5] [clang][PAC] Add __builtin_get_vtable_pointer
With pointer aut
@@ -3074,6 +3074,39 @@ following way:
Query for this feature with ``__has_builtin(__builtin_offsetof)``.
+``__builtin_get_vtable_pointer``
+
+
+``__builtin_get_vtable_pointer`` loads and authenticates the primary vtable
+pointer from an instanc
@@ -4451,6 +4451,8 @@ defm ptrauth_init_fini_address_discrimination :
OptInCC1FFlag<"ptrauth-init-fini
"Enable address discrimination of function pointers in init/fini arrays">;
defm ptrauth_elf_got : OptInCC1FFlag<"ptrauth-elf-got", "Enable authentication
of pointers from G
https://github.com/ojhunt commented:
This basically looks good to me, sans the "can this just be on by default for
elf/linux/etc" question
https://github.com/llvm/llvm-project/pull/140276
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https:/
@@ -1883,6 +1883,9 @@ void Clang::AddAArch64TargetArgs(const ArgList &Args,
Args.addOptInFlag(
CmdArgs, options::OPT_fptrauth_function_pointer_type_discrimination,
options::OPT_fno_ptrauth_function_pointer_type_discrimination);
+ Args.addOptInFlag(
--
https://github.com/ojhunt closed
https://github.com/llvm/llvm-project/pull/139790
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https://github.com/ojhunt edited
https://github.com/llvm/llvm-project/pull/140276
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https://github.com/ojhunt updated
https://github.com/llvm/llvm-project/pull/135562
>From 5dc1e5fbb57f88e412e044605d8fe30a66255a35 Mon Sep 17 00:00:00 2001
From: Oliver Hunt
Date: Sun, 13 Apr 2025 13:21:49 -0700
Subject: [PATCH 1/4] [clang][CGObjC] Sign the v-table pointer in ObjC
exception RTT
ojhunt wrote:
Sorry, I missed this
Now that the ptrauth qualifier is available I'm going to be preparing and
pushing the darwin libunwind+personality function changes, which are very
aggressive in there protection of data and pointers
https://github.com/llvm/llvm-project/pull/113368
_
https://github.com/ojhunt updated
https://github.com/llvm/llvm-project/pull/139790
>From a933679801bde89b53584c4c65118658477db4da Mon Sep 17 00:00:00 2001
From: Oliver Hunt
Date: Tue, 13 May 2025 13:35:55 -0700
Subject: [PATCH 1/3] [clang][PAC] Add __builtin_get_vtable_pointer
With pointer aut
https://github.com/ojhunt updated
https://github.com/llvm/llvm-project/pull/139790
>From a933679801bde89b53584c4c65118658477db4da Mon Sep 17 00:00:00 2001
From: Oliver Hunt
Date: Tue, 13 May 2025 13:35:55 -0700
Subject: [PATCH 1/2] [clang][PAC] Add __builtin_get_vtable_pointer
With pointer aut
@@ -0,0 +1,250 @@
+// RUN: cp %s %t
+// RUN: %clang_cc1 -x c++ -Wunused-lambda-capture -Wno-unused-value -std=c++1z
-fixit %t
+// RUN: grep -v CHECK %t | FileCheck %s
+
+
+#define MACRO_CAPTURE(...) __VA_ARGS__
+int main() {
+int a = 0, b = 0, c = 0;
+auto F0 = [a, &b]()
@@ -972,6 +972,12 @@ class Sema final : public SemaBase {
/// Calls \c Lexer::getLocForEndOfToken()
SourceLocation getLocForEndOfToken(SourceLocation Loc, unsigned Offset = 0);
+ /// Calls \c Lexer::findNextToken() to find the next token, and if the
+ /// locations of bo
@@ -2164,15 +2164,29 @@ ExprResult Sema::BuildLambdaExpr(SourceLocation
StartLoc, SourceLocation EndLoc,
bool IsLast = (I + 1) == LSI->NumExplicitCaptures;
SourceRange FixItRange;
if (CaptureRange.isValid()) {
+auto GetTrailingEndLocat
@@ -84,6 +84,21 @@ SourceLocation Sema::getLocForEndOfToken(SourceLocation Loc,
unsigned Offset) {
return Lexer::getLocForEndOfToken(Loc, Offset, SourceMgr, LangOpts);
}
+SourceRange Sema::getRangeForNextToken(SourceLocation Loc,
+ bool
@@ -84,6 +84,21 @@ SourceLocation Sema::getLocForEndOfToken(SourceLocation Loc,
unsigned Offset) {
return Lexer::getLocForEndOfToken(Loc, Offset, SourceMgr, LangOpts);
}
+SourceRange Sema::getRangeForNextToken(SourceLocation Loc,
+ bool
@@ -972,6 +972,12 @@ class Sema final : public SemaBase {
/// Calls \c Lexer::getLocForEndOfToken()
SourceLocation getLocForEndOfToken(SourceLocation Loc, unsigned Offset = 0);
+ /// Calls \c Lexer::findNextToken() to find the next token, and if the
+ /// locations of bo
https://github.com/ojhunt updated
https://github.com/llvm/llvm-project/pull/138482
>From ecea44f2965cda3a4e6e1ccec096066830ddfa41 Mon Sep 17 00:00:00 2001
From: Oliver Hunt
Date: Sun, 4 May 2025 21:07:33 -0700
Subject: [PATCH 1/2] [clang][ptrauth] Add support for querying the ptrauth
schema of
https://github.com/ojhunt created
https://github.com/llvm/llvm-project/pull/143230
This hardens the unwinding logic and datastructures on systems that support
pointer authentication.
The approach taken to hardening is to harden the schemas of as many high value
fields in the myriad structs as
ojhunt wrote:
I've finally got our downstream hardening to the point where it should be sane:
https://github.com/llvm/llvm-project/pull/143230
https://github.com/llvm/llvm-project/pull/113368
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htt
https://github.com/ojhunt updated
https://github.com/llvm/llvm-project/pull/143230
>From 68103962b254565fdfad069c350af90ede7109b4 Mon Sep 17 00:00:00 2001
From: Oliver Hunt
Date: Fri, 6 Jun 2025 18:50:28 -0700
Subject: [PATCH] [runtimes][PAC] Harden unwinding when possible (#138571)
This harde
https://github.com/ojhunt updated
https://github.com/llvm/llvm-project/pull/143230
>From 637245f9be6ed0163c9129d27a572f153b6f8523 Mon Sep 17 00:00:00 2001
From: Oliver Hunt
Date: Fri, 6 Jun 2025 18:50:28 -0700
Subject: [PATCH] [runtimes][PAC] Harden unwinding when possible (#138571)
This harde
ojhunt wrote:
Updating formatting before review - had discussed with Louis and he expressed a
preference for some of it, but this llvm.org style bot complains many other
cases (likely a local config issue when I was trying to cleanup the downstream
code.
So I've updated with a direct clang-fo
@@ -0,0 +1,25 @@
+// RUN: %clang_cc1 -triple aarch64-linux-gnu -mbranch-target-enforce
-msign-return-address=all -emit-llvm %s -o - | FileCheck
--check-prefixes=CHECK,BTI-SIGNRA %s
ojhunt wrote:
none of the other ptrauth tests are in a subdirectory, are yo
@@ -65,6 +65,17 @@ enum class PointerAuthenticationMode : unsigned {
SignAndAuth
};
+static constexpr llvm::StringLiteral PointerAuthenticationOptionStrip =
"strip";
ojhunt wrote:
ah so what @erichkeane was suggesting is that places needing the string woul
https://github.com/ojhunt created
https://github.com/llvm/llvm-project/pull/143796
This reworks the way we compute relocatability and replaceability of types. We
do this by having a single interface the provides a full `TypeRelocationInfo`
for a QualType. This simplifies the reasoning for all
https://github.com/ojhunt approved this pull request.
Looks good
https://github.com/llvm/llvm-project/pull/143350
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@@ -2052,7 +2052,7 @@ static void DiagnoseNonTriviallyRelocatableReason(Sema
&SemaRef,
}
if (!D->hasSimpleMoveConstructor() && !D->hasSimpleCopyConstructor()) {
-const auto *Decl = cast(
+const auto *Decl = cast_or_null(
ojhunt wrote:
I didn't re
https://github.com/ojhunt edited
https://github.com/llvm/llvm-project/pull/143350
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ojhunt wrote:
unused variable errors are likely fallout from refactoring and workaround
removals I did as part of the prep, will do some cleanup/diagnostics work later
this week.
I mostly wanted to get this available to others to see whether they were ok
adopting this rather than rolling thei
@@ -32,22 +32,23 @@
#endif
#if defined(_WIN32)
- #if defined(_LIBCXXABI_DISABLE_VISIBILITY_ANNOTATIONS) ||
(defined(__MINGW32__) && !defined(_LIBCXXABI_BUILDING_LIBRARY))
- #define _LIBCXXABI_HIDDEN
- #define _LIBCXXABI_DATA_VIS
- #define _LIBCXXABI_FUNC_VIS
- #define _LI
@@ -32,22 +32,23 @@
#endif
#if defined(_WIN32)
- #if defined(_LIBCXXABI_DISABLE_VISIBILITY_ANNOTATIONS) ||
(defined(__MINGW32__) && !defined(_LIBCXXABI_BUILDING_LIBRARY))
- #define _LIBCXXABI_HIDDEN
- #define _LIBCXXABI_DATA_VIS
- #define _LIBCXXABI_FUNC_VIS
- #define _LI
@@ -126,6 +130,36 @@ _LIBUNWIND_HIDDEN int __unw_set_reg(unw_cursor_t *cursor,
unw_regnum_t regNum,
// First, get the FDE for the old location and then update it.
co->getInfo(&info);
co->setInfoBasedOnIPRegister(false);
+
+#if __has_feature(ptrauth_calls)
+
@@ -807,7 +812,12 @@ DEFINE_LIBUNWIND_FUNCTION(__unw_getcontext)
strd31, [x0, #0x208]
#endif
movx0, #0 // return UNW_ESUCCESS
+
+#if __has_feature(ptrauth_calls)
+ retab
+#else
ojhunt wrote:
This is what we have downstream, i
@@ -557,7 +596,19 @@ set_registers(_Unwind_Exception* unwind_exception,
_Unwind_Context* context,
reinterpret_cast(unwind_exception));
_Unwind_SetGR(context, __builtin_eh_return_data_regno(1),
static_cast(results.ttypeIndex));
+#if defined(__A
ojhunt wrote:
Closing this PR because there's a lot of noise in it that is just completely
reverted/gone at this point.
https://github.com/llvm/llvm-project/pull/143796
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https://github.com/ojhunt closed
https://github.com/llvm/llvm-project/pull/143796
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https://github.com/ojhunt created
https://github.com/llvm/llvm-project/pull/143969
This adds a function to ASTContext to query whether a type contains values with
address discriminated pointer auth, and performs the required semantic checks
to ensure correct reporting of relocatablity in those
https://github.com/ojhunt updated
https://github.com/llvm/llvm-project/pull/143969
>From f47680310ed68a9f8e8cb15bc1cd474740072463 Mon Sep 17 00:00:00 2001
From: Oliver Hunt
Date: Thu, 12 Jun 2025 13:17:11 -0700
Subject: [PATCH 1/2] [clang] Fix PointerAuth semantics of
cpp_trivially_relocatable
https://github.com/ojhunt updated
https://github.com/llvm/llvm-project/pull/143969
>From f47680310ed68a9f8e8cb15bc1cd474740072463 Mon Sep 17 00:00:00 2001
From: Oliver Hunt
Date: Thu, 12 Jun 2025 13:17:11 -0700
Subject: [PATCH 1/2] [clang] Fix PointerAuth semantics of
cpp_trivially_relocatable
@@ -628,10 +628,13 @@ class ASTContext : public RefCountedBase {
getRelocationInfoForCXXRecord(const CXXRecordDecl *) const;
void setRelocationInfoForCXXRecord(const CXXRecordDecl *,
CXXRecordDeclRelocationInfo);
+ bool containsAddressD
https://github.com/ojhunt edited
https://github.com/llvm/llvm-project/pull/143969
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@@ -1705,6 +1705,40 @@ void ASTContext::setRelocationInfoForCXXRecord(
RelocatableClasses.insert({D, Info});
}
+bool ASTContext::containsAddressDiscriminatedPointerAuth(QualType T) {
+ if (!LangOpts.PointerAuthCalls && !LangOpts.PointerAuthIntrinsics)
+return false;
+
+
@@ -15121,6 +15155,21 @@ ASTContext::baseForVTableAuthentication(const
CXXRecordDecl *ThisClass) {
return PrimaryBase;
}
+bool ASTContext::hasAddressDiscriminatedVTableAuthentication(
ojhunt wrote:
Which function?
https://github.com/llvm/llvm-project/pull
@@ -121,8 +121,10 @@ static bool hasSuitableConstructorForRelocation(Sema
&SemaRef,
CXXMethodDecl *Decl =
LookupSpecialMemberFromXValue(SemaRef, D, /*Assign=*/false);
ojhunt wrote:
Is it reasonable to have LookupSpecialMemberFromXValue simply return
@@ -292,77 +294,129 @@ Sema::CheckCXX2CRelocatableAndReplaceable(const
CXXRecordDecl *D) {
return HasSuitableSMP();
// is a union with no user-declared special member functions, or
-if (IsUnion())
+if (IsTrivialUnion())
return HasSuitableSMP();
@@ -621,17 +621,24 @@ class ASTContext : public RefCountedBase {
public:
struct CXXRecordDeclRelocationInfo {
+static CXXRecordDeclRelocationInfo NonRelocatable() {
+ return {false, false};
+}
+
unsigned IsRelocatable;
unsigned IsReplaceable;
-
@@ -10615,7 +10615,7 @@ void Sema::checkIllFormedTrivialABIStruct(CXXRecordDecl
&RD) {
}
}
- if (IsCXXTriviallyRelocatableType(RD))
+ if (CheckCXX2CRelocatableAndReplaceable(&RD).IsRelocatable)
ojhunt wrote:
I think I did restore it for QualType an
@@ -292,77 +294,129 @@ Sema::CheckCXX2CRelocatableAndReplaceable(const
CXXRecordDecl *D) {
return HasSuitableSMP();
// is a union with no user-declared special member functions, or
-if (IsUnion())
+if (IsTrivialUnion())
return HasSuitableSMP();
ojhunt wrote:
Re: the oracle concerns - there are some protections we have, but in general I
think the current pointer auth semantics/diagnostics make it too easy to
silently introduce oracles. Additionally a lot of the current unwind
pointerauth work is focused on protecting the ABI boundarie
https://github.com/ojhunt created
https://github.com/llvm/llvm-project/pull/148576
Alas reflection pushed p2719 out of C++26, so this PR changes the diagnostics
to reflect that for now type aware allocation is functionally a clang extension.
>From d86fea4e16dc9962f87a8969e74b62767476ec30 Mon S
https://github.com/ojhunt updated
https://github.com/llvm/llvm-project/pull/147899
>From 3b0a91c3d4a4ae8ec7980d2201d94f59746fb769 Mon Sep 17 00:00:00 2001
From: Oliver Hunt
Date: Wed, 9 Jul 2025 17:30:48 -0700
Subject: [PATCH] [clang][ObjC][PAC] Add ptrauth protections to objective-c
This PR i
https://github.com/ojhunt created
https://github.com/llvm/llvm-project/pull/147938
Make sure to mark a concept decl as being invalid if the constraint is invalid.
>From 8beb2eeab5270df51408d233d90d89be735b1828 Mon Sep 17 00:00:00 2001
From: Oliver Hunt
Date: Thu, 10 Jul 2025 03:57:32 -0700
Sub
https://github.com/ojhunt updated
https://github.com/llvm/llvm-project/pull/147899
>From 0d38b0d9b153bfb55c199d3bb4b6cdca2f708af9 Mon Sep 17 00:00:00 2001
From: Oliver Hunt
Date: Wed, 9 Jul 2025 17:30:48 -0700
Subject: [PATCH 1/4] [clang][ObjC][PAC] Add ptrauth protections to objective-c
This
https://github.com/ojhunt updated
https://github.com/llvm/llvm-project/pull/147899
>From 0d38b0d9b153bfb55c199d3bb4b6cdca2f708af9 Mon Sep 17 00:00:00 2001
From: Oliver Hunt
Date: Wed, 9 Jul 2025 17:30:48 -0700
Subject: [PATCH] [clang][ObjC][PAC] Add ptrauth protections to objective-c
This PR i
ojhunt wrote:
dammit habitually force pushed a squash and rebase. #skilled.
https://github.com/llvm/llvm-project/pull/147899
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https://github.com/ojhunt updated
https://github.com/llvm/llvm-project/pull/147899
>From 0d38b0d9b153bfb55c199d3bb4b6cdca2f708af9 Mon Sep 17 00:00:00 2001
From: Oliver Hunt
Date: Wed, 9 Jul 2025 17:30:48 -0700
Subject: [PATCH 1/2] [clang][ObjC][PAC] Add ptrauth protections to objective-c
This
https://github.com/ojhunt updated
https://github.com/llvm/llvm-project/pull/147899
>From 0d38b0d9b153bfb55c199d3bb4b6cdca2f708af9 Mon Sep 17 00:00:00 2001
From: Oliver Hunt
Date: Wed, 9 Jul 2025 17:30:48 -0700
Subject: [PATCH 1/3] [clang][ObjC][PAC] Add ptrauth protections to objective-c
This
@@ -2341,8 +2341,15 @@ llvm::Value *CodeGenFunction::EmitDynamicCast(Address
ThisAddr,
} else if (IsExact) {
// If the destination type is effectively final, this pointer points to the
// right type if and only if its vptr has the right value.
-Value = CGM.getCXX
https://github.com/ojhunt updated
https://github.com/llvm/llvm-project/pull/148576
>From d86fea4e16dc9962f87a8969e74b62767476ec30 Mon Sep 17 00:00:00 2001
From: Oliver Hunt
Date: Mon, 14 Jul 2025 00:26:08 -0700
Subject: [PATCH 1/2] [clang] Update diagnostics for type aware allocators
Alas refl
https://github.com/ojhunt updated
https://github.com/llvm/llvm-project/pull/148576
>From d86fea4e16dc9962f87a8969e74b62767476ec30 Mon Sep 17 00:00:00 2001
From: Oliver Hunt
Date: Mon, 14 Jul 2025 00:26:08 -0700
Subject: [PATCH 1/3] [clang] Update diagnostics for type aware allocators
Alas refl
ojhunt wrote:
I'll be back to working on this later today - there's a pile of feedback, and a
bunch of nonsense that I managed to accidentally accrue and/or re-format when
pushing the PR so it will take a little time to unbreak that. It may be easiest
to force push a repaired PR first and then
ojhunt wrote:
> Please update `clang/docs/LanguageExtensions.rst`.
Good point, also as it got dropped from C++26 I'm restoring and updating the in
tree docs as well.
https://github.com/llvm/llvm-project/pull/148576
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@@ -2341,8 +2341,15 @@ llvm::Value *CodeGenFunction::EmitDynamicCast(Address
ThisAddr,
} else if (IsExact) {
// If the destination type is effectively final, this pointer points to the
// right type if and only if its vptr has the right value.
-Value = CGM.getCXX
https://github.com/ojhunt edited
https://github.com/llvm/llvm-project/pull/148576
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