[clang] [Clang][FMV] Stop emitting implicit default version using target_clones. (PR #141808)
via cfe-commits
cfe-commits at lists.llvm.org
Wed May 28 10:29:49 PDT 2025
llvmbot wrote:
<!--LLVM PR SUMMARY COMMENT-->
@llvm/pr-subscribers-clang-codegen
Author: Alexandros Lamprineas (labrinea)
<details>
<summary>Changes</summary>
With the current behavior the following example yields a linker error: "multiple definition of `foo.default'"
// Translation Unit 1
__attribute__((target_clones("dotprod, sve"))) int foo(void) { return 1; }
// Translation Unit 2
int foo(void) { return 0; }
__attribute__((target_version("dotprod"))) int foo(void); __attribute__((target_version("sve"))) int foo(void); int bar(void) { return foo(); }
That is because foo.default is generated twice. As a user I don't find this particularly intuitive. If I wanted the default to be generated in TU1 I'd rather write target_clones("dotprod, sve", "default") explicitly.
When changing the code I noticed that the RISC-V target defers the resolver emission when encountering a target_version definition. This seems accidental since it only makes sense for AArch64, where we only emit a resolver once we've processed the entire TU, and only if the default version is present. I've changed this so that RISC-V immediately emmits the resolver. I adjusted the codegen tests since the functions now appear in a different order.
Implements https://github.com/ARM-software/acle/pull/377
---
Patch is 143.14 KiB, truncated to 20.00 KiB below, full version: https://github.com/llvm/llvm-project/pull/141808.diff
13 Files Affected:
- (modified) clang/lib/CodeGen/CodeGenModule.cpp (+12-13)
- (modified) clang/lib/Sema/SemaDeclAttr.cpp (+1-7)
- (modified) clang/test/AST/attr-target-version.c (+1-1)
- (modified) clang/test/CodeGen/AArch64/fmv-detection.c (+388-388)
- (added) clang/test/CodeGen/AArch64/fmv-duplicate-mangled-name.c (+24)
- (modified) clang/test/CodeGen/AArch64/fmv-features.c (+1-1)
- (modified) clang/test/CodeGen/AArch64/fmv-resolver-emission.c (+44)
- (modified) clang/test/CodeGen/AArch64/mixed-target-attributes.c (+86-86)
- (modified) clang/test/CodeGen/attr-target-clones-aarch64.c (+219-355)
- (modified) clang/test/CodeGen/attr-target-version-riscv.c (+157-157)
- (modified) clang/test/CodeGenCXX/attr-target-clones-aarch64.cpp (+28-81)
- (modified) clang/test/CodeGenCXX/attr-target-version-riscv.cpp (+149-149)
- (modified) clang/test/Sema/attr-target-clones-aarch64.c (+2)
``````````diff
diff --git a/clang/lib/CodeGen/CodeGenModule.cpp b/clang/lib/CodeGen/CodeGenModule.cpp
index 6d2c705338ecf..9383c57d3c991 100644
--- a/clang/lib/CodeGen/CodeGenModule.cpp
+++ b/clang/lib/CodeGen/CodeGenModule.cpp
@@ -4237,19 +4237,19 @@ void CodeGenModule::EmitMultiVersionFunctionDefinition(GlobalDecl GD,
EmitGlobalFunctionDefinition(GD.getWithMultiVersionIndex(I), nullptr);
} else if (auto *TC = FD->getAttr<TargetClonesAttr>()) {
for (unsigned I = 0; I < TC->featuresStrs_size(); ++I)
- // AArch64 favors the default target version over the clone if any.
- if ((!TC->isDefaultVersion(I) || !getTarget().getTriple().isAArch64()) &&
- TC->isFirstOfVersion(I))
+ if (TC->isFirstOfVersion(I))
EmitGlobalFunctionDefinition(GD.getWithMultiVersionIndex(I), nullptr);
- // Ensure that the resolver function is also emitted.
- 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);
+ // Ensure that the resolver function is also emitted.
+ if (FD->isTargetVersionMultiVersion() || FD->isTargetClonesMultiVersion()) {
+ // On AArch64 defer the resolver emission until the entire TU is processed.
+ if (getTarget().getTriple().isAArch64())
+ AddDeferredMultiVersionResolverToEmit(GD);
+ else
+ GetOrCreateMultiVersionResolver(GD);
+ }
}
void CodeGenModule::EmitGlobalDefinition(GlobalDecl GD, llvm::GlobalValue *GV) {
@@ -4351,7 +4351,7 @@ void CodeGenModule::emitMultiVersionFunctions() {
};
// For AArch64, a resolver is only emitted if a function marked with
- // target_version("default")) or target_clones() is present and defined
+ // target_version("default")) or target_clones("default") is defined
// in this TU. For other architectures it is always emitted.
bool ShouldEmitResolver = !getTarget().getTriple().isAArch64();
SmallVector<CodeGenFunction::FMVResolverOption, 10> Options;
@@ -4374,12 +4374,11 @@ void CodeGenModule::emitMultiVersionFunctions() {
TVA->getFeatures(Feats, Delim);
Options.emplace_back(Func, Feats);
} else if (const auto *TC = CurFD->getAttr<TargetClonesAttr>()) {
- if (IsDefined)
- ShouldEmitResolver = true;
for (unsigned I = 0; I < TC->featuresStrs_size(); ++I) {
if (!TC->isFirstOfVersion(I))
continue;
-
+ if (TC->isDefaultVersion(I) && IsDefined)
+ ShouldEmitResolver = true;
llvm::Function *Func = createFunction(CurFD, I);
Feats.clear();
if (getTarget().getTriple().isX86()) {
diff --git a/clang/lib/Sema/SemaDeclAttr.cpp b/clang/lib/Sema/SemaDeclAttr.cpp
index 54bac40982eda..6a202f5c6c167 100644
--- a/clang/lib/Sema/SemaDeclAttr.cpp
+++ b/clang/lib/Sema/SemaDeclAttr.cpp
@@ -3494,13 +3494,7 @@ static void handleTargetClonesAttr(Sema &S, Decl *D, const ParsedAttr &AL) {
if (HasCommas && AL.getNumArgs() > 1)
S.Diag(AL.getLoc(), diag::warn_target_clone_mixed_values);
- if (S.Context.getTargetInfo().getTriple().isAArch64() && !HasDefault) {
- // Add default attribute if there is no one
- HasDefault = true;
- Strings.push_back("default");
- }
-
- if (!HasDefault) {
+ if (!HasDefault && !S.Context.getTargetInfo().getTriple().isAArch64()) {
S.Diag(AL.getLoc(), diag::err_target_clone_must_have_default);
return;
}
diff --git a/clang/test/AST/attr-target-version.c b/clang/test/AST/attr-target-version.c
index 52ac0e61b5a59..b537f5e685a31 100644
--- a/clang/test/AST/attr-target-version.c
+++ b/clang/test/AST/attr-target-version.c
@@ -1,7 +1,7 @@
// RUN: %clang_cc1 -triple aarch64-linux-gnu -ast-dump %s | FileCheck %s
int __attribute__((target_version("sve2-bitperm + sha2"))) foov(void) { return 1; }
-int __attribute__((target_clones(" lse + fp + sha3 "))) fooc(void) { return 2; }
+int __attribute__((target_clones(" lse + fp + sha3 ", "default"))) fooc(void) { return 2; }
// CHECK: TargetVersionAttr
// CHECK: sve2-bitperm + sha2
// CHECK: TargetClonesAttr
diff --git a/clang/test/CodeGen/AArch64/fmv-detection.c b/clang/test/CodeGen/AArch64/fmv-detection.c
index 44702a04e532e..e585140a1eb08 100644
--- a/clang/test/CodeGen/AArch64/fmv-detection.c
+++ b/clang/test/CodeGen/AArch64/fmv-detection.c
@@ -97,7 +97,7 @@ __attribute__((target_version("wfxt"))) int fmv(void) { return 0; }
__attribute__((target_version("cssc+fp"))) int fmv(void);
-__attribute__((target_version("default"))) int fmv(void);
+__attribute__((target_version("default"))) int fmv(void) { return 0; }
int caller() {
return fmv();
@@ -121,380 +121,6 @@ int caller() {
// CHECK-NEXT: ret i32 0
//
//
-// CHECK-LABEL: define {{[^@]+}}@fmv.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]], 2304
-// CHECK-NEXT: [[TMP2:%.*]] = icmp eq i64 [[TMP1]], 2304
-// 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._McsscMfp
-// CHECK: resolver_else:
-// CHECK-NEXT: [[TMP4:%.*]] = load i64, ptr @__aarch64_cpu_features, align 8
-// CHECK-NEXT: [[TMP5:%.*]] = and i64 [[TMP4]], 2048
-// CHECK-NEXT: [[TMP6:%.*]] = icmp eq i64 [[TMP5]], 2048
-// 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._Mcssc
-// CHECK: resolver_else2:
-// CHECK-NEXT: [[TMP8:%.*]] = load i64, ptr @__aarch64_cpu_features, align 8
-// CHECK-NEXT: [[TMP9:%.*]] = and i64 [[TMP8]], 576460752303423488
-// CHECK-NEXT: [[TMP10:%.*]] = icmp eq i64 [[TMP9]], 576460752303423488
-// 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._Mmops
-// CHECK: resolver_else4:
-// CHECK-NEXT: [[TMP12:%.*]] = load i64, ptr @__aarch64_cpu_features, align 8
-// CHECK-NEXT: [[TMP13:%.*]] = and i64 [[TMP12]], 144119586256651008
-// CHECK-NEXT: [[TMP14:%.*]] = icmp eq i64 [[TMP13]], 144119586256651008
-// CHECK-NEXT: [[TMP15:%.*]] = and i1 true, [[TMP14]]
-// CHECK-NEXT: br i1 [[TMP15]], label [[RESOLVER_RETURN5:%.*]], label [[RESOLVER_ELSE6:%.*]]
-// CHECK: resolver_return5:
-// CHECK-NEXT: ret ptr @fmv._Msme2
-// CHECK: resolver_else6:
-// CHECK-NEXT: [[TMP16:%.*]] = load i64, ptr @__aarch64_cpu_features, align 8
-// CHECK-NEXT: [[TMP17:%.*]] = and i64 [[TMP16]], 72061992218723072
-// CHECK-NEXT: [[TMP18:%.*]] = icmp eq i64 [[TMP17]], 72061992218723072
-// CHECK-NEXT: [[TMP19:%.*]] = and i1 true, [[TMP18]]
-// CHECK-NEXT: br i1 [[TMP19]], label [[RESOLVER_RETURN7:%.*]], label [[RESOLVER_ELSE8:%.*]]
-// CHECK: resolver_return7:
-// CHECK-NEXT: ret ptr @fmv._Msme-i16i64
-// CHECK: resolver_else8:
-// CHECK-NEXT: [[TMP20:%.*]] = load i64, ptr @__aarch64_cpu_features, align 8
-// CHECK-NEXT: [[TMP21:%.*]] = and i64 [[TMP20]], 36033195199759104
-// CHECK-NEXT: [[TMP22:%.*]] = icmp eq i64 [[TMP21]], 36033195199759104
-// CHECK-NEXT: [[TMP23:%.*]] = and i1 true, [[TMP22]]
-// CHECK-NEXT: br i1 [[TMP23]], label [[RESOLVER_RETURN9:%.*]], label [[RESOLVER_ELSE10:%.*]]
-// CHECK: resolver_return9:
-// CHECK-NEXT: ret ptr @fmv._Msme-f64f64
-// CHECK: resolver_else10:
-// CHECK-NEXT: [[TMP24:%.*]] = load i64, ptr @__aarch64_cpu_features, align 8
-// CHECK-NEXT: [[TMP25:%.*]] = and i64 [[TMP24]], 18014398509481984
-// CHECK-NEXT: [[TMP26:%.*]] = icmp eq i64 [[TMP25]], 18014398509481984
-// CHECK-NEXT: [[TMP27:%.*]] = and i1 true, [[TMP26]]
-// CHECK-NEXT: br i1 [[TMP27]], label [[RESOLVER_RETURN11:%.*]], label [[RESOLVER_ELSE12:%.*]]
-// CHECK: resolver_return11:
-// CHECK-NEXT: ret ptr @fmv._Mwfxt
-// CHECK: resolver_else12:
-// CHECK-NEXT: [[TMP28:%.*]] = load i64, ptr @__aarch64_cpu_features, align 8
-// CHECK-NEXT: [[TMP29:%.*]] = and i64 [[TMP28]], 1125899906842624
-// CHECK-NEXT: [[TMP30:%.*]] = icmp eq i64 [[TMP29]], 1125899906842624
-// CHECK-NEXT: [[TMP31:%.*]] = and i1 true, [[TMP30]]
-// CHECK-NEXT: br i1 [[TMP31]], label [[RESOLVER_RETURN13:%.*]], label [[RESOLVER_ELSE14:%.*]]
-// CHECK: resolver_return13:
-// CHECK-NEXT: ret ptr @fmv._Mbti
-// CHECK: resolver_else14:
-// CHECK-NEXT: [[TMP32:%.*]] = load i64, ptr @__aarch64_cpu_features, align 8
-// CHECK-NEXT: [[TMP33:%.*]] = and i64 [[TMP32]], 562949953421312
-// CHECK-NEXT: [[TMP34:%.*]] = icmp eq i64 [[TMP33]], 562949953421312
-// CHECK-NEXT: [[TMP35:%.*]] = and i1 true, [[TMP34]]
-// CHECK-NEXT: br i1 [[TMP35]], label [[RESOLVER_RETURN15:%.*]], label [[RESOLVER_ELSE16:%.*]]
-// CHECK: resolver_return15:
-// CHECK-NEXT: ret ptr @fmv._Mssbs
-// CHECK: resolver_else16:
-// CHECK-NEXT: [[TMP36:%.*]] = load i64, ptr @__aarch64_cpu_features, align 8
-// CHECK-NEXT: [[TMP37:%.*]] = and i64 [[TMP36]], 70368744177664
-// CHECK-NEXT: [[TMP38:%.*]] = icmp eq i64 [[TMP37]], 70368744177664
-// CHECK-NEXT: [[TMP39:%.*]] = and i1 true, [[TMP38]]
-// CHECK-NEXT: br i1 [[TMP39]], label [[RESOLVER_RETURN17:%.*]], label [[RESOLVER_ELSE18:%.*]]
-// CHECK: resolver_return17:
-// CHECK-NEXT: ret ptr @fmv._Msb
-// CHECK: resolver_else18:
-// CHECK-NEXT: [[TMP40:%.*]] = load i64, ptr @__aarch64_cpu_features, align 8
-// CHECK-NEXT: [[TMP41:%.*]] = and i64 [[TMP40]], 17592186044416
-// CHECK-NEXT: [[TMP42:%.*]] = icmp eq i64 [[TMP41]], 17592186044416
-// CHECK-NEXT: [[TMP43:%.*]] = and i1 true, [[TMP42]]
-// CHECK-NEXT: br i1 [[TMP43]], label [[RESOLVER_RETURN19:%.*]], label [[RESOLVER_ELSE20:%.*]]
-// CHECK: resolver_return19:
-// CHECK-NEXT: ret ptr @fmv._Mmemtag
-// CHECK: resolver_else20:
-// CHECK-NEXT: [[TMP44:%.*]] = load i64, ptr @__aarch64_cpu_features, align 8
-// CHECK-NEXT: [[TMP45:%.*]] = and i64 [[TMP44]], 4398180795136
-// CHECK-NEXT: [[TMP46:%.*]] = icmp eq i64 [[TMP45]], 4398180795136
-// CHECK-NEXT: [[TMP47:%.*]] = and i1 true, [[TMP46]]
-// CHECK-NEXT: br i1 [[TMP47]], label [[RESOLVER_RETURN21:%.*]], label [[RESOLVER_ELSE22:%.*]]
-// CHECK: resolver_return21:
-// CHECK-NEXT: ret ptr @fmv._Msme
-// CHECK: resolver_else22:
-// CHECK-NEXT: [[TMP48:%.*]] = load i64, ptr @__aarch64_cpu_features, align 8
-// CHECK-NEXT: [[TMP49:%.*]] = and i64 [[TMP48]], 2268816540448
-// CHECK-NEXT: [[TMP50:%.*]] = icmp eq i64 [[TMP49]], 2268816540448
-// CHECK-NEXT: [[TMP51:%.*]] = and i1 true, [[TMP50]]
-// CHECK-NEXT: br i1 [[TMP51]], label [[RESOLVER_RETURN23:%.*]], label [[RESOLVER_ELSE24:%.*]]
-// CHECK: resolver_return23:
-// CHECK-NEXT: ret ptr @fmv._Msve2-sm4
-// CHECK: resolver_else24:
-// CHECK-NEXT: [[TMP52:%.*]] = load i64, ptr @__aarch64_cpu_features, align 8
-// CHECK-NEXT: [[TMP53:%.*]] = and i64 [[TMP52]], 1169304924928
-// CHECK-NEXT: [[TMP54:%.*]] = icmp eq i64 [[TMP53]], 1169304924928
-// CHECK-NEXT: [[TMP55:%.*]] = and i1 true, [[TMP54]]
-// CHECK-NEXT: br i1 [[TMP55]], label [[RESOLVER_RETURN25:%.*]], label [[RESOLVER_ELSE26:%.*]]
-// CHECK: resolver_return25:
-// CHECK-NEXT: ret ptr @fmv._Msve2-sha3
-// CHECK: resolver_else26:
-// CHECK-NEXT: [[TMP56:%.*]] = load i64, ptr @__aarch64_cpu_features, align 8
-// CHECK-NEXT: [[TMP57:%.*]] = and i64 [[TMP56]], 619549098240
-// CHECK-NEXT: [[TMP58:%.*]] = icmp eq i64 [[TMP57]], 619549098240
-// CHECK-NEXT: [[TMP59:%.*]] = and i1 true, [[TMP58]]
-// CHECK-NEXT: br i1 [[TMP59]], label [[RESOLVER_RETURN27:%.*]], label [[RESOLVER_ELSE28:%.*]]
-// CHECK: resolver_return27:
-// CHECK-NEXT: ret ptr @fmv._Msve2-bitperm
-// CHECK: resolver_else28:
-// CHECK-NEXT: [[TMP60:%.*]] = load i64, ptr @__aarch64_cpu_features, align 8
-// CHECK-NEXT: [[TMP61:%.*]] = and i64 [[TMP60]], 344671224576
-// CHECK-NEXT: [[TMP62:%.*]] = icmp eq i64 [[TMP61]], 344671224576
-// CHECK-NEXT: [[TMP63:%.*]] = and i1 true, [[TMP62]]
-// CHECK-NEXT: br i1 [[TMP63]], label [[RESOLVER_RETURN29:%.*]], label [[RESOLVER_ELSE30:%.*]]
-// CHECK: resolver_return29:
-// CHECK-NEXT: ret ptr @fmv._Msve2-aes
-// CHECK: resolver_else30:
-// CHECK-NEXT: [[TMP64:%.*]] = load i64, ptr @__aarch64_cpu_features, align 8
-// CHECK-NEXT: [[TMP65:%.*]] = and i64 [[TMP64]], 69793284352
-// CHECK-NEXT: [[TMP66:%.*]] = icmp eq i64 [[TMP65]], 69793284352
-// CHECK-NEXT: [[TMP67:%.*]] = and i1 true, [[TMP66]]
-// CHECK-NEXT: br i1 [[TMP67]], label [[RESOLVER_RETURN31:%.*]], label [[RESOLVER_ELSE32:%.*]]
-// CHECK: resolver_return31:
-// CHECK-NEXT: ret ptr @fmv._Msve2
-// CHECK: resolver_else32:
-// CHECK-NEXT: [[TMP68:%.*]] = load i64, ptr @__aarch64_cpu_features, align 8
-// CHECK-NEXT: [[TMP69:%.*]] = and i64 [[TMP68]], 35433545984
-// CHECK-NEXT: [[TMP70:%.*]] = icmp eq i64 [[TMP69]], 35433545984
-// CHECK-NEXT: [[TMP71:%.*]] = and i1 true, [[TMP70]]
-// CHECK-NEXT: br i1 [[TMP71]], label [[RESOLVER_RETURN33:%.*]], label [[RESOLVER_ELSE34:%.*]]
-// CHECK: resolver_return33:
-// CHECK-NEXT: ret ptr @fmv._Mf64mm
-// CHECK: resolver_else34:
-// CHECK-NEXT: [[TMP72:%.*]] = load i64, ptr @__aarch64_cpu_features, align 8
-// CHECK-NEXT: [[TMP73:%.*]] = and i64 [[TMP72]], 18253676800
-// CHECK-NEXT: [[TMP74:%.*]] = icmp eq i64 [[TMP73]], 18253676800
-// CHECK-NEXT: [[TMP75:%.*]] = and i1 true, [[TMP74]]
-// CHECK-NEXT: br i1 [[TMP75]], label [[RESOLVER_RETURN35:%.*]], label [[RESOLVER_ELSE36:%.*]]
-// CHECK: resolver_return35:
-// CHECK-NEXT: ret ptr @fmv._Mf32mm
-// CHECK: resolver_else36:
-// CHECK-NEXT: [[TMP76:%.*]] = load i64, ptr @__aarch64_cpu_features, align 8
-// CHECK-NEXT: [[TMP77:%.*]] = and i64 [[TMP76]], 1073807616
-// CHECK-NEXT: [[TMP78:%.*]] = icmp eq i64 [[TMP77]], 1073807616
-// CHECK-NEXT: [[TMP79:%.*]] = and i1 true, [[TMP78]]
-// CHECK-NEXT: br i1 [[TMP79]], label [[RESOLVER_RETURN37:%.*]], label [[RESOLVER_ELSE38:%.*]]
-// CHECK: resolver_return37:
-// CHECK-NEXT: ret ptr @fmv._Msve
-// CHECK: resolver_else38:
-// CHECK-NEXT: [[TMP80:%.*]] = load i64, ptr @__aarch64_cpu_features, align 8
-// CHECK-NEXT: [[TMP81:%.*]] = and i64 [[TMP80]], 134218496
-// CHECK-NEXT: [[TMP82:%.*]] = icmp eq i64 [[TMP81]], 134218496
-// CHECK-NEXT: [[TMP83:%.*]] = and i1 true, [[TMP82]]
-// CHECK-NEXT: br i1 [[TMP83]], label [[RESOLVER_RETURN39:%.*]], label [[RESOLVER_ELSE40:%.*]]
-// CHECK: resolver_return39:
-// CHECK-NEXT: ret ptr @fmv._Mbf16
-// CHECK: resolver_else40:
-// CHECK-NEXT: [[TMP84:%.*]] = load i64, ptr @__aarch64_cpu_features, align 8
-// CHECK-NEXT: [[TMP85:%.*]] = and i64 [[TMP84]], 67109632
-// CHECK-NEXT: [[TMP86:%.*]] = icmp eq i64 [[TMP85]], 67109632
-// CHECK-NEXT: [[TMP87:%.*]] = and i1 true, [[TMP86]]
-// CHECK-NEXT: br i1 [[TMP87]], label [[RESOLVER_RETURN41:%.*]], label [[RESOLVER_ELSE42:%.*]]
-// CHECK: resolver_return41:
-// CHECK-NEXT: ret ptr @fmv._Mi8mm
-// CHECK: resolver_else42:
-// CHECK-NEXT: [[TMP88:%.*]] = load i64, ptr @__aarch64_cpu_features, align 8
-// CHECK-NEXT: [[TMP89:%.*]] = and i64 [[TMP88]], 16777472
-// CHECK-NEXT: [[TMP90:%.*]] = icmp eq i64 [[TMP89]], 16777472
-// CHECK-NEXT: [[TMP91:%.*]] = and i1 true, [[TMP90]]
-// CHECK-NEXT: br i1 [[TMP91]], label [[RESOLVER_RETURN43:%.*]], label [[RESOLVER_ELSE44:%.*]]
-// CHECK: resolver_return43:
-// CHECK-NEXT: ret ptr @fmv._Mfrintts
-// CHECK: resolver_else44:
-// CHECK-NEXT: [[TMP92:%.*]] = load i64, ptr @__aarch64_cpu_features, align 8
-// CHECK-NEXT: [[TMP93:%.*]] = and i64 [[TMP92]], 288230376164294656
-// CHECK-NEXT: [[TMP94:%.*]] = icmp eq i64 [[TMP93]], 288230376164294656
-// CHECK-NEXT: [[TMP95:%.*]] = and i1 true, [[TMP94]]
-// CHECK-NEXT: br i1 [[TMP95]], label [[RESOLVER_RETURN45:%.*]], label [[RESOLVER_ELSE46:%.*]]
-// CHECK: resolver_return45:
-// CHECK-NEXT: ret ptr @fmv._Mrcpc3
-// CHECK: resolver_else46:
-// CHECK-NEXT: [[TMP96:%.*]] = load i64, ptr @__aarch64_cpu_features, align 8
-// CHECK-NEXT: [[TMP97:%.*]] = and i64 [[TMP96]], 12582912
-// CHECK-NEXT: [[TMP98:%.*]] = icmp eq i64 [[TMP97]], 12582912
-// CHECK-NEXT: [[TMP99:%.*]] = and i1 true, [[TMP98]]
-// CHECK-NEXT: br i1 [[TMP99]], label [[RESOLVER_RETURN47:%.*]], label [[RESOLVER_ELSE48:%.*]]
-// CHECK: resolver_return47:
-// CHECK-NEXT: ret ptr @fmv._Mrcpc2
-// CHECK: resolver_else48:
-// CHECK-NEXT: [[TMP100:%.*]] = load i64, ptr @__aarch64_cpu_features, align 8
-// CHECK-NEXT: [[TMP101:%.*]] = and i64 [[TMP100]], 4194304
-// CHECK-NEXT: [[TMP102:%.*]] = icmp eq i64 [[TMP101]], 4194304
-// CHECK-NEXT: [[TMP103:%.*]] = and i1 true, [[TMP102]]
-// CHECK-NEXT: br i1 [[TMP103]], label [[RESOLVER_RETURN49:%.*]], label [[RESOLVER_ELSE50:%.*]]
-// CHECK: resolver_return49:
-// CHECK-NEXT: ret ptr @fmv._Mrcpc
-// CHECK: resolver_else50:
-// CHECK-NEXT: [[TMP104:%.*]] = load i64, ptr @__aarch64_cpu_features, align 8
-// CHECK-NEXT: [[TMP105:%.*]] = and i64 [[TMP104]], 2097920
-// CHECK-NEXT: [[TMP106:%.*]] = icmp eq i64 [[TMP105]], 2097920
-// CHECK-NEXT: [[TMP107:%.*]] = and i1 true, [[TMP106]]
-// CHECK-NEXT: br i1 [[TMP107]], label [[RESOLVER_RETURN51:%.*]], label [[RESOLVER_ELSE52:%.*]]
-// CHECK: resolver_return51:
-// CHECK-NEXT: ret ptr @fmv._Mfcma
-// CHECK: resolver_else52:
-// CHECK-NEXT: [[TMP108:%.*]] = load i64, ptr @__aarch64_cpu_features, align 8
-// CHECK-NEXT: [[TMP109:%.*]] = and i64 [[TMP108]], 1048832
-// CHECK-NEXT: [[TMP110:%.*]] = icmp eq i64 [[TMP109]], 1048832
-// CHECK-NEXT: [[TMP111:%.*]] = and i1 true, [[TMP110]]
-// CHECK-NEXT: br i1 [[TMP111]], label [[RESOLVER_RETURN53:%.*]], label [[RESOLVER_ELSE54:%.*]]
-// CHECK: resolver_return53:
-// CHECK-NEXT: ret ptr @fmv._Mjscvt
-// CHECK: resolver_else54:
-// CHECK-NEXT: [[TMP112:%.*]] = load i64, ptr @__aarch64_cpu_features, align 8
-// CHECK-NEXT: [[TMP113:%.*]] = and i64 [[TMP112]], 786432
-// CHECK-NEXT: [[TMP114:%.*]] = icmp eq i64 [[TMP113]], 786432
-// CHECK-NEXT: [[TMP115:%.*]] = and i1 true, [[TMP114]]
-// CHECK-NEXT: br i1 [[TMP115]], label [[RESOLVER_RETURN55:%.*]], label [[RESOLVER_ELSE56:%.*]]
-// CHECK: resolver_return55:
-// CHECK-NEXT: ret ptr @fmv._Mdpb2
-// CHECK: resolver_else56:
-// CHECK-NEXT: [[TMP116:%.*]] = load i64, ptr @__aarch64_cpu_features, align 8
-// CHECK-NEXT: [[TMP117:%.*]] = and i64 [[TMP116]], 262144
-// CHECK-NEXT: [[TMP118:%.*]] = icmp eq i64 [[TMP117]], 262144
-// CHECK-NEXT: [[TMP119:%.*]] = and i1 true, [[TMP118]]
-// CHECK-NEXT: br i1 [[TMP119]], label [[RESOLVER_RETURN57:%.*]], label [[RESOLVER_ELSE58:%.*]]
-// CHECK: resolver_return57:
-// CHECK-NEXT: ret ptr @fmv._Mdpb
-// CHECK: resolver_else58:
-// CHECK-NEXT: [[TMP120:%.*]] = load i64, ptr @__aarch64_cpu_features, align 8
-// CHECK-NEXT: [[TMP121:%.*]] = and i64 [[TMP120]], 131072
-// CHECK-NEXT: [[TMP122:%.*]] = icmp eq i64 [[TMP121]], 131072
-// CHECK-NEXT: [[TMP123:%.*]] = and i1 true, [[TMP122]]
-// CHECK-NEXT: br i1 [[TMP123]], label [[RESOLVER_RETURN59:%.*]], label [[RESOLVER_ELSE60:%.*]]
-// CHECK: resolver_return59:
-// CHECK-NEXT: ret ptr @fmv._Mdit
-// CHECK: resolver_else60:
-// CHECK-NEXT: [[TMP124:%.*]] = load i64, ptr @__aarch64_cpu_features, align 8
-// CHECK-NEXT: [[TMP125:%.*]] = and i64 [[TMP124]], 66312
-// CHECK-NEXT: [[TMP126:%.*]] = icmp eq i64 [[TMP125]], 66312
-// CHECK-NEXT: [[TMP127:%.*]] = and i1 true, [[TMP126]]
-// CHECK-NEXT: br i1 [[TMP127]], label [[RESOLVER_RETURN61:%.*]], ...
[truncated]
``````````
</details>
https://github.com/llvm/llvm-project/pull/141808
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