[clang] Revert "[FMV] Emit the resolver along with the default version definition." (PR #85914)
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Wed Mar 20 03:09:59 PDT 2024
llvmbot wrote:
<!--LLVM PR SUMMARY COMMENT-->
@llvm/pr-subscribers-clang
Author: Alexandros Lamprineas (labrinea)
<details>
<summary>Changes</summary>
Reverts llvm/llvm-project#<!-- -->84405
In between of passing the precommit tests on github and being merged
some change (perhaps in the AArch64 backend?) landed which resulted
in altering the generated resolver. I will regenerate the tests
perhaps using a less sensitive runline to such changes.
---
Patch is 70.00 KiB, truncated to 20.00 KiB below, full version: https://github.com/llvm/llvm-project/pull/85914.diff
4 Files Affected:
- (modified) clang/lib/CodeGen/CodeGenModule.cpp (+13-42)
- (modified) clang/lib/CodeGen/CodeGenModule.h (-5)
- (modified) clang/test/CodeGen/attr-target-version.c (+180-366)
- (modified) clang/test/CodeGenCXX/attr-target-version.cpp (+45-216)
``````````diff
diff --git a/clang/lib/CodeGen/CodeGenModule.cpp b/clang/lib/CodeGen/CodeGenModule.cpp
index cb153066b28dd1..bb26bfcddaeb78 100644
--- a/clang/lib/CodeGen/CodeGenModule.cpp
+++ b/clang/lib/CodeGen/CodeGenModule.cpp
@@ -3449,9 +3449,6 @@ bool CodeGenModule::MayBeEmittedEagerly(const ValueDecl *Global) {
// Implicit template instantiations may change linkage if they are later
// explicitly instantiated, so they should not be emitted eagerly.
return false;
- // Defer until all versions have been semantically checked.
- if (FD->hasAttr<TargetVersionAttr>() && !FD->isMultiVersion())
- return false;
}
if (const auto *VD = dyn_cast<VarDecl>(Global)) {
if (Context.getInlineVariableDefinitionKind(VD) ==
@@ -4000,13 +3997,10 @@ void CodeGenModule::EmitMultiVersionFunctionDefinition(GlobalDecl GD,
EmitGlobalFunctionDefinition(GD.getWithMultiVersionIndex(I), nullptr);
// Ensure that the resolver function is also emitted.
GetOrCreateMultiVersionResolver(GD);
+ } else if (FD->hasAttr<TargetVersionAttr>()) {
+ GetOrCreateMultiVersionResolver(GD);
} else
EmitGlobalFunctionDefinition(GD, GV);
-
- // Defer the resolver emission until we can reason whether the TU
- // contains a default target version implementation.
- if (FD->isTargetVersionMultiVersion())
- AddDeferredMultiVersionResolverToEmit(GD);
}
void CodeGenModule::EmitGlobalDefinition(GlobalDecl GD, llvm::GlobalValue *GV) {
@@ -4099,11 +4093,10 @@ void CodeGenModule::emitMultiVersionFunctions() {
const auto *FD = cast<FunctionDecl>(GD.getDecl());
assert(FD && "Expected a FunctionDecl");
- bool EmitResolver = !FD->isTargetVersionMultiVersion();
SmallVector<CodeGenFunction::MultiVersionResolverOption, 10> Options;
if (FD->isTargetMultiVersion()) {
getContext().forEachMultiversionedFunctionVersion(
- FD, [this, &GD, &Options, &EmitResolver](const FunctionDecl *CurFD) {
+ FD, [this, &GD, &Options](const FunctionDecl *CurFD) {
GlobalDecl CurGD{
(CurFD->isDefined() ? CurFD->getDefinition() : CurFD)};
StringRef MangledName = getMangledName(CurGD);
@@ -4129,9 +4122,6 @@ void CodeGenModule::emitMultiVersionFunctions() {
TA->getArchitecture(), Feats);
} else {
const auto *TVA = CurFD->getAttr<TargetVersionAttr>();
- if (CurFD->isUsed() || (TVA->isDefaultVersion() &&
- CurFD->doesThisDeclarationHaveABody()))
- EmitResolver = true;
llvm::SmallVector<StringRef, 8> Feats;
TVA->getFeatures(Feats);
Options.emplace_back(cast<llvm::Function>(Func),
@@ -4187,27 +4177,22 @@ void CodeGenModule::emitMultiVersionFunctions() {
continue;
}
- if (!EmitResolver)
- continue;
-
llvm::Constant *ResolverConstant = GetOrCreateMultiVersionResolver(GD);
if (auto *IFunc = dyn_cast<llvm::GlobalIFunc>(ResolverConstant)) {
ResolverConstant = IFunc->getResolver();
if (FD->isTargetClonesMultiVersion() ||
FD->isTargetVersionMultiVersion()) {
+ const CGFunctionInfo &FI = getTypes().arrangeGlobalDeclaration(GD);
+ llvm::FunctionType *DeclTy = getTypes().GetFunctionType(FI);
std::string MangledName = getMangledNameImpl(
*this, GD, FD, /*OmitMultiVersionMangling=*/true);
- if (!GetGlobalValue(MangledName + ".ifunc")) {
- const CGFunctionInfo &FI = getTypes().arrangeGlobalDeclaration(GD);
- llvm::FunctionType *DeclTy = getTypes().GetFunctionType(FI);
- // In prior versions of Clang, the mangling for ifuncs incorrectly
- // included an .ifunc suffix. This alias is generated for backward
- // compatibility. It is deprecated, and may be removed in the future.
- auto *Alias = llvm::GlobalAlias::create(
- DeclTy, 0, getMultiversionLinkage(*this, GD),
- MangledName + ".ifunc", IFunc, &getModule());
- SetCommonAttributes(FD, Alias);
- }
+ // In prior versions of Clang, the mangling for ifuncs incorrectly
+ // included an .ifunc suffix. This alias is generated for backward
+ // compatibility. It is deprecated, and may be removed in the future.
+ auto *Alias = llvm::GlobalAlias::create(
+ DeclTy, 0, getMultiversionLinkage(*this, GD),
+ MangledName + ".ifunc", IFunc, &getModule());
+ SetCommonAttributes(FD, Alias);
}
}
llvm::Function *ResolverFunc = cast<llvm::Function>(ResolverConstant);
@@ -4364,20 +4349,6 @@ void CodeGenModule::emitCPUDispatchDefinition(GlobalDecl GD) {
}
}
-/// Adds a declaration to the list of multi version functions if not present.
-void CodeGenModule::AddDeferredMultiVersionResolverToEmit(GlobalDecl GD) {
- const auto *FD = cast<FunctionDecl>(GD.getDecl());
- assert(FD && "Not a FunctionDecl?");
-
- if (FD->isTargetVersionMultiVersion()) {
- std::string MangledName =
- getMangledNameImpl(*this, GD, FD, /*OmitMultiVersionMangling=*/true);
- if (!DeferredResolversToEmit.insert(MangledName).second)
- return;
- }
- MultiVersionFuncs.push_back(GD);
-}
-
/// If a dispatcher for the specified mangled name is not in the module, create
/// and return an llvm Function with the specified type.
llvm::Constant *CodeGenModule::GetOrCreateMultiVersionResolver(GlobalDecl GD) {
@@ -4417,7 +4388,7 @@ llvm::Constant *CodeGenModule::GetOrCreateMultiVersionResolver(GlobalDecl GD) {
// The resolver needs to be created. For target and target_clones, defer
// creation until the end of the TU.
if (FD->isTargetMultiVersion() || FD->isTargetClonesMultiVersion())
- AddDeferredMultiVersionResolverToEmit(GD);
+ MultiVersionFuncs.push_back(GD);
// For cpu_specific, don't create an ifunc yet because we don't know if the
// cpu_dispatch will be emitted in this translation unit.
diff --git a/clang/lib/CodeGen/CodeGenModule.h b/clang/lib/CodeGen/CodeGenModule.h
index 1cc447765e2c97..ec34680fd3f7e6 100644
--- a/clang/lib/CodeGen/CodeGenModule.h
+++ b/clang/lib/CodeGen/CodeGenModule.h
@@ -348,8 +348,6 @@ class CodeGenModule : public CodeGenTypeCache {
/// yet.
llvm::DenseMap<StringRef, GlobalDecl> DeferredDecls;
- llvm::StringSet<llvm::BumpPtrAllocator> DeferredResolversToEmit;
-
/// This is a list of deferred decls which we have seen that *are* actually
/// referenced. These get code generated when the module is done.
std::vector<GlobalDecl> DeferredDeclsToEmit;
@@ -1590,9 +1588,6 @@ class CodeGenModule : public CodeGenTypeCache {
llvm::AttributeList ExtraAttrs = llvm::AttributeList(),
ForDefinition_t IsForDefinition = NotForDefinition);
- // Adds a declaration to the list of multi version functions if not present.
- void AddDeferredMultiVersionResolverToEmit(GlobalDecl GD);
-
// References to multiversion functions are resolved through an implicitly
// defined resolver function. This function is responsible for creating
// the resolver symbol for the provided declaration. The value returned
diff --git a/clang/test/CodeGen/attr-target-version.c b/clang/test/CodeGen/attr-target-version.c
index fc8bb680fe43ac..b7112c783da913 100644
--- a/clang/test/CodeGen/attr-target-version.c
+++ b/clang/test/CodeGen/attr-target-version.c
@@ -1,5 +1,5 @@
// NOTE: Assertions have been autogenerated by utils/update_cc_test_checks.py UTC_ARGS: --function-signature --check-attributes --check-globals --include-generated-funcs
-// RUN: %clang_cc1 -triple aarch64-none-linux-gnu -target-feature -v9.5a -S -emit-llvm -o - %s | FileCheck %s
+// RUN: %clang_cc1 -triple aarch64-none-linux-gnu -target-feature +ls64 -target-feature +fullfp16 -S -emit-llvm -o - %s | FileCheck %s
// RUN: %clang_cc1 -triple aarch64-none-linux-gnu -target-feature -fmv -S -emit-llvm -o - %s | FileCheck %s -check-prefix=CHECK-NOFMV
int __attribute__((target_version("rng+flagm+fp16fml"))) fmv(void) { return 1; }
@@ -11,15 +11,15 @@ int __attribute__((target_version("fp+aes"))) fmv(void) { return 6; }
int __attribute__((target_version("crc+ls64_v"))) fmv(void) { return 7; }
int __attribute__((target_version("bti"))) fmv(void) { return 8; }
int __attribute__((target_version("sme2"))) fmv(void) { return 9; }
-int __attribute__((target_version("default"))) fmv(void);
+int __attribute__((target_version("default"))) fmv(void) { return 0; }
int __attribute__((target_version("ls64+simd"))) fmv_one(void) { return 1; }
int __attribute__((target_version("dpb"))) fmv_one(void) { return 2; }
-int __attribute__((target_version("default"))) fmv_one(void);
+int __attribute__((target_version("default"))) fmv_one(void) { return 0; }
int __attribute__((target_version("fp"))) fmv_two(void) { return 1; }
int __attribute__((target_version("simd"))) fmv_two(void) { return 2; }
int __attribute__((target_version("dgh"))) fmv_two(void) { return 3; }
int __attribute__((target_version("fp16+simd"))) fmv_two(void) { return 4; }
-int __attribute__((target_version("default"))) fmv_two(void);
+int __attribute__((target_version("default"))) fmv_two(void) { return 0; }
int foo() {
return fmv()+fmv_one()+fmv_two();
}
@@ -84,33 +84,9 @@ int hoo(void) {
return fp1() + fp2();
}
-// This should generate one target version but no resolver.
-__attribute__((target_version("default"))) int unused_with_forward_default_decl(void);
-__attribute__((target_version("mops"))) int unused_with_forward_default_decl(void) { return 0; }
-// This should also generate one target version but no resolver.
-extern int unused_with_implicit_extern_forward_default_decl(void);
-__attribute__((target_version("dotprod")))
-int unused_with_implicit_extern_forward_default_decl(void) { return 0; }
-// This should also generate one target version but no resolver.
-__attribute__((target_version("aes"))) int unused_with_default_decl(void) { return 0; }
-__attribute__((target_version("default"))) int unused_with_default_decl(void);
-// This should generate two target versions and the resolver.
-__attribute__((target_version("sve"))) int unused_with_default_def(void) { return 0; }
-__attribute__((target_version("default"))) int unused_with_default_def(void) { return 1; }
-
-// This should also generate two target versions and the resolver.
-__attribute__((target_version("fp16"))) int unused_with_implicit_default_def(void) { return 0; }
-int unused_with_implicit_default_def(void) { return 1; }
-
-// This should also generate two target versions and the resolver.
-int unused_with_implicit_forward_default_def(void) { return 0; }
-__attribute__((target_version("lse"))) int unused_with_implicit_forward_default_def(void) { return 1; }
-
-// This should generate a normal function.
-__attribute__((target_version("rdm"))) int unused_without_default(void) { return 0; }
//.
// CHECK: @__aarch64_cpu_features = external dso_local global { i64 }
@@ -121,107 +97,38 @@ __attribute__((target_version("rdm"))) int unused_without_default(void) { return
// CHECK: @fmv_c.ifunc = weak_odr alias void (), ptr @fmv_c
// CHECK: @fmv_inline.ifunc = weak_odr alias i32 (), ptr @fmv_inline
// CHECK: @fmv_d.ifunc = internal alias i32 (), ptr @fmv_d
-// CHECK: @unused_with_default_def.ifunc = weak_odr alias i32 (), ptr @unused_with_default_def
-// CHECK: @unused_with_implicit_default_def.ifunc = weak_odr alias i32 (), ptr @unused_with_implicit_default_def
-// CHECK: @unused_with_implicit_forward_default_def.ifunc = weak_odr alias i32 (), ptr @unused_with_implicit_forward_default_def
// CHECK: @fmv = weak_odr ifunc i32 (), ptr @fmv.resolver
// CHECK: @fmv_one = weak_odr ifunc i32 (), ptr @fmv_one.resolver
// CHECK: @fmv_two = weak_odr ifunc i32 (), ptr @fmv_two.resolver
-// CHECK: @fmv_inline = weak_odr ifunc i32 (), ptr @fmv_inline.resolver
// CHECK: @fmv_e = weak_odr ifunc i32 (), ptr @fmv_e.resolver
-// CHECK: @fmv_d = internal ifunc i32 (), ptr @fmv_d.resolver
// CHECK: @fmv_c = weak_odr ifunc void (), ptr @fmv_c.resolver
-// CHECK: @unused_with_default_def = weak_odr ifunc i32 (), ptr @unused_with_default_def.resolver
-// CHECK: @unused_with_implicit_default_def = weak_odr ifunc i32 (), ptr @unused_with_implicit_default_def.resolver
-// CHECK: @unused_with_implicit_forward_default_def = weak_odr ifunc i32 (), ptr @unused_with_implicit_forward_default_def.resolver
+// CHECK: @fmv_inline = weak_odr ifunc i32 (), ptr @fmv_inline.resolver
+// CHECK: @fmv_d = internal ifunc i32 (), ptr @fmv_d.resolver
//.
// CHECK: Function Attrs: noinline nounwind optnone
-// CHECK-LABEL: define {{[^@]+}}@fmv._Mflagm2Msme-i16i64
+// CHECK-LABEL: define {{[^@]+}}@fmv._MflagmMfp16fmlMrng
// CHECK-SAME: () #[[ATTR0:[0-9]+]] {
// CHECK-NEXT: entry:
-// CHECK-NEXT: ret i32 2
+// CHECK-NEXT: ret i32 1
//
//
// CHECK: Function Attrs: noinline nounwind optnone
-// CHECK-LABEL: define {{[^@]+}}@fmv._MlseMsha2
+// CHECK-LABEL: define {{[^@]+}}@fmv_one._Mls64Msimd
// CHECK-SAME: () #[[ATTR1:[0-9]+]] {
// CHECK-NEXT: entry:
-// CHECK-NEXT: ret i32 3
-//
-//
-// CHECK: Function Attrs: noinline nounwind optnone
-// CHECK-LABEL: define {{[^@]+}}@fmv._MdotprodMls64_accdata
-// CHECK-SAME: () #[[ATTR2:[0-9]+]] {
-// CHECK-NEXT: entry:
-// CHECK-NEXT: ret i32 4
-//
-//
-// CHECK: Function Attrs: noinline nounwind optnone
-// CHECK-LABEL: define {{[^@]+}}@fmv._Mfp16fmlMmemtag
-// CHECK-SAME: () #[[ATTR3:[0-9]+]] {
-// CHECK-NEXT: entry:
-// CHECK-NEXT: ret i32 5
-//
-//
-// CHECK: Function Attrs: noinline nounwind optnone
-// CHECK-LABEL: define {{[^@]+}}@fmv._MaesMfp
-// CHECK-SAME: () #[[ATTR4:[0-9]+]] {
-// CHECK-NEXT: entry:
-// CHECK-NEXT: ret i32 6
-//
-//
-// CHECK: Function Attrs: noinline nounwind optnone
-// CHECK-LABEL: define {{[^@]+}}@fmv._McrcMls64_v
-// CHECK-SAME: () #[[ATTR5:[0-9]+]] {
-// CHECK-NEXT: entry:
-// CHECK-NEXT: ret i32 7
-//
-//
-// CHECK: Function Attrs: noinline nounwind optnone
-// CHECK-LABEL: define {{[^@]+}}@fmv._Mbti
-// CHECK-SAME: () #[[ATTR6:[0-9]+]] {
-// CHECK-NEXT: entry:
-// CHECK-NEXT: ret i32 8
-//
-//
-// CHECK: Function Attrs: noinline nounwind optnone
-// CHECK-LABEL: define {{[^@]+}}@fmv._Msme2
-// CHECK-SAME: () #[[ATTR7:[0-9]+]] {
-// CHECK-NEXT: entry:
-// CHECK-NEXT: ret i32 9
-//
-//
-// CHECK: Function Attrs: noinline nounwind optnone
-// CHECK-LABEL: define {{[^@]+}}@fmv_one._Mdpb
-// CHECK-SAME: () #[[ATTR8:[0-9]+]] {
-// CHECK-NEXT: entry:
-// CHECK-NEXT: ret i32 2
-//
-//
-// CHECK: Function Attrs: noinline nounwind optnone
-// CHECK-LABEL: define {{[^@]+}}@fmv_two._Msimd
-// CHECK-SAME: () #[[ATTR4]] {
-// CHECK-NEXT: entry:
-// CHECK-NEXT: ret i32 2
-//
-//
-// CHECK: Function Attrs: noinline nounwind optnone
-// CHECK-LABEL: define {{[^@]+}}@fmv_two._Mdgh
-// CHECK-SAME: () #[[ATTR9:[0-9]+]] {
-// CHECK-NEXT: entry:
-// CHECK-NEXT: ret i32 3
+// CHECK-NEXT: ret i32 1
//
//
// CHECK: Function Attrs: noinline nounwind optnone
-// CHECK-LABEL: define {{[^@]+}}@fmv_two._Mfp16Msimd
-// CHECK-SAME: () #[[ATTR10:[0-9]+]] {
+// CHECK-LABEL: define {{[^@]+}}@fmv_two._Mfp
+// CHECK-SAME: () #[[ATTR1]] {
// CHECK-NEXT: entry:
-// CHECK-NEXT: ret i32 4
+// CHECK-NEXT: ret i32 1
//
//
// CHECK: Function Attrs: noinline nounwind optnone
// CHECK-LABEL: define {{[^@]+}}@foo
-// CHECK-SAME: () #[[ATTR9]] {
+// CHECK-SAME: () #[[ATTR2:[0-9]+]] {
// CHECK-NEXT: entry:
// CHECK-NEXT: [[CALL:%.*]] = call i32 @fmv()
// CHECK-NEXT: [[CALL1:%.*]] = call i32 @fmv_one()
@@ -251,16 +158,16 @@ __attribute__((target_version("rdm"))) int unused_without_default(void) { return
// CHECK-NEXT: ret ptr @fmv._Mflagm2Msme-i16i64
// CHECK: resolver_else2:
// CHECK-NEXT: [[TMP8:%.*]] = load i64, ptr @__aarch64_cpu_features, align 8
-// CHECK-NEXT: [[TMP9:%.*]] = and i64 [[TMP8]], 9007199254741008
-// CHECK-NEXT: [[TMP10:%.*]] = icmp eq i64 [[TMP9]], 9007199254741008
+// CHECK-NEXT: [[TMP9:%.*]] = and i64 [[TMP8]], 16
+// CHECK-NEXT: [[TMP10:%.*]] = icmp eq i64 [[TMP9]], 16
// CHECK-NEXT: [[TMP11:%.*]] = and i1 true, [[TMP10]]
// CHECK-NEXT: br i1 [[TMP11]], label [[RESOLVER_RETURN3:%.*]], label [[RESOLVER_ELSE4:%.*]]
// CHECK: resolver_return3:
// CHECK-NEXT: ret ptr @fmv._MdotprodMls64_accdata
// CHECK: resolver_else4:
// CHECK-NEXT: [[TMP12:%.*]] = load i64, ptr @__aarch64_cpu_features, align 8
-// CHECK-NEXT: [[TMP13:%.*]] = and i64 [[TMP12]], 4503599627371520
-// CHECK-NEXT: [[TMP14:%.*]] = icmp eq i64 [[TMP13]], 4503599627371520
+// CHECK-NEXT: [[TMP13:%.*]] = and i64 [[TMP12]], 1024
+// CHECK-NEXT: [[TMP14:%.*]] = icmp eq i64 [[TMP13]], 1024
// CHECK-NEXT: [[TMP15:%.*]] = and i1 true, [[TMP14]]
// CHECK-NEXT: br i1 [[TMP15]], label [[RESOLVER_RETURN5:%.*]], label [[RESOLVER_ELSE6:%.*]]
// CHECK: resolver_return5:
@@ -275,8 +182,8 @@ __attribute__((target_version("rdm"))) int unused_without_default(void) { return
// CHECK-NEXT: ret ptr @fmv._Mfp16fmlMmemtag
// CHECK: resolver_else8:
// CHECK-NEXT: [[TMP20:%.*]] = load i64, ptr @__aarch64_cpu_features, align 8
-// CHECK-NEXT: [[TMP21:%.*]] = and i64 [[TMP20]], 16640
-// CHECK-NEXT: [[TMP22:%.*]] = icmp eq i64 [[TMP21]], 16640
+// CHECK-NEXT: [[TMP21:%.*]] = and i64 [[TMP20]], 16384
+// CHECK-NEXT: [[TMP22:%.*]] = icmp eq i64 [[TMP21]], 16384
// CHECK-NEXT: [[TMP23:%.*]] = and i1 true, [[TMP22]]
// CHECK-NEXT: br i1 [[TMP23]], label [[RESOLVER_RETURN9:%.*]], label [[RESOLVER_ELSE10:%.*]]
// CHECK: resolver_return9:
@@ -311,95 +218,43 @@ __attribute__((target_version("rdm"))) int unused_without_default(void) { return
//
// CHECK-LABEL: define {{[^@]+}}@fmv_one.resolver() comdat {
// CHECK-NEXT: resolver_entry:
-// CHECK-NEXT: call void @__init_cpu_features_resolver()
-// CHECK-NEXT: [[TMP0:%.*]] = load i64, ptr @__aarch64_cpu_features, align 8
-// CHECK-NEXT: [[TMP1:%.*]] = and i64 [[TMP0]], 2251799813685760
-// CHECK-NEXT: [[TMP2:%.*]] = icmp eq i64 [[TMP1]], 2251799813685760
-// CHECK-NEXT: [[TMP3:%.*]] = and i1 true, [[TMP2]]
-// CHECK-NEXT: br i1 [[TMP3]], label [[RESOLVER_RETURN:%.*]], label [[RESOLVER_ELSE:%.*]]
-// CHECK: resolver_return:
// CHECK-NEXT: ret ptr @fmv_one._Mls64Msimd
-// CHECK: resolver_else:
-// CHECK-NEXT: [[TMP4:%.*]] = load i64, ptr @__aarch64_cpu_features, align 8
-// CHECK-NEXT: [[TMP5:%.*]] = and i64 [[TMP4]], 262144
-// CHECK-NEXT: [[TMP6:%.*]] = icmp eq i64 [[TMP5]], 262144
-// CHECK-NEXT: [[TMP7:%.*]] = and i1 true, [[TMP6]]
-// CHECK-NEXT: br i1 [[TMP7]], label [[RESOLVER_RETURN1:%.*]], label [[RESOLVER_ELSE2:%.*]]
-// CHECK: resolver_return1:
-// CHECK-NEXT: ret ptr @fmv_one._Mdpb
-// CHECK: resolver_else2:
-// CHECK-NEXT: ret ptr @fmv_one.default
//
//
// CHECK-LABEL: define {{[^@]+}}@fmv_two.resolver() comdat {
// CHECK-NEXT: resolver_entry:
-// CHECK-NEXT: call void @__init_cpu_features_resolver()
-// CHECK-NEXT: [[TMP0:%.*]] = load i64, ptr @__aarch64_cpu_features, align 8
-// CHECK-NEXT: [[TMP1:%.*]] = and i64 [[TMP0]], 66048
-// CHECK-NEXT: [[TMP2:%.*]] = icmp eq i64 [[TMP1]], 66048
-// CHECK-NEXT: [[TMP3:%.*]] = and i1 true, [[TMP2]]
-// CHECK-NEXT: br i1 [[TMP3]], label [[RESOLVER_RETURN:%.*]], label [[RESOLVER_ELSE:%.*]]
-// CHECK: resolver_return:
// CHECK-NEXT: ret ptr @fmv_two._Mfp16Msimd
-// CHECK: resolver_else:
-// CHECK-NEXT: [[TMP4:%.*]] = load i64, ptr @__aarch64_cpu_features, align 8
-// CHECK-NEXT: [[TMP5:%.*]] = and i64 [[TMP4]], 33554432
-// CHECK-NEXT: [[TMP6:%.*]] = icmp eq i64 [[TMP5]], 33554432
-// CHECK-NEXT: [[TMP7:%.*]] = and i1 true, [[TMP6]]
-// CHECK-NEXT: br i1 [[TMP7]], label [[RESOLVER_RETURN1:%.*]], label [[RESOLVER_ELSE2:%.*]]
-// CHECK: resolver_return1:
-// CHECK-NEXT: ret ptr @fmv_two._Mdgh
-// CHECK: resolver_else2:
-// CHECK-NEXT: [[TMP8:%.*]] = load i64, ptr @__aarch64_cpu_features, align 8
-// CHECK-NEXT: [[TMP9:%.*]] = and i64 [[TMP8]], 512
-// CHECK-NEXT: [[TMP10:%.*]] = icmp eq i64 [[TMP9]], 512
-// CHECK-NEXT: [[TMP11:%.*]] = and i1 true, [[TMP10]]
-// CHECK-NEXT: br i1 [[TMP11]], label [[RESOLVER_RETURN3:%.*]], label [[RESOLVER_ELSE4:%.*]]
-// CHECK: resolver_return3:
-// CHECK-NEXT: ret ptr @fmv_two._Msimd
-// CHECK: resolve...
[truncated]
``````````
</details>
https://github.com/llvm/llvm-project/pull/85914
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