https://github.com/labrinea created https://github.com/llvm/llvm-project/pull/146092
Implements option one of the proposal https://github.com/ARM-software/acle/issues/403 >From c5bd398ad9116a29f363be4f0b9ec54fca0d7016 Mon Sep 17 00:00:00 2001 From: Alexandros Lamprineas <alexandros.lamprin...@arm.com> Date: Thu, 26 Jun 2025 15:52:11 +0100 Subject: [PATCH 1/2] Supports option 1 of https://github.com/ARM-software/acle/issues/403 --- clang/lib/CodeGen/Targets/AArch64.cpp | 5 ++++- .../CodeGen/AArch64/fmv-duplicate-mangled-name.c | 16 ++++++++++++++++ .../llvm/TargetParser/AArch64FeatPriorities.inc | 7 ++++++- llvm/lib/Target/AArch64/AArch64FMV.td | 5 +++++ llvm/lib/TargetParser/AArch64TargetParser.cpp | 11 ++++++++--- 5 files changed, 39 insertions(+), 5 deletions(-) diff --git a/clang/lib/CodeGen/Targets/AArch64.cpp b/clang/lib/CodeGen/Targets/AArch64.cpp index b82c46966cf0b..e2ede08942183 100644 --- a/clang/lib/CodeGen/Targets/AArch64.cpp +++ b/clang/lib/CodeGen/Targets/AArch64.cpp @@ -1336,10 +1336,13 @@ void AArch64ABIInfo::appendAttributeMangling(StringRef AttrStr, }); llvm::SmallDenseSet<StringRef, 8> UniqueFeats; - for (auto &Feat : Features) + for (auto &Feat : Features) { + if (!getTarget().doesFeatureAffectCodeGen(Feat)) + continue; if (auto Ext = llvm::AArch64::parseFMVExtension(Feat)) if (UniqueFeats.insert(Ext->Name).second) Out << 'M' << Ext->Name; + } } std::unique_ptr<TargetCodeGenInfo> diff --git a/clang/test/CodeGen/AArch64/fmv-duplicate-mangled-name.c b/clang/test/CodeGen/AArch64/fmv-duplicate-mangled-name.c index e7e611e09542e..44a798a84a8a2 100644 --- a/clang/test/CodeGen/AArch64/fmv-duplicate-mangled-name.c +++ b/clang/test/CodeGen/AArch64/fmv-duplicate-mangled-name.c @@ -1,5 +1,7 @@ // RUN: %clang_cc1 -triple aarch64-linux-gnu -verify -emit-llvm-only %s -DCHECK_IMPLICIT_DEFAULT // RUN: %clang_cc1 -triple aarch64-linux-gnu -verify -emit-llvm-only %s -DCHECK_EXPLICIT_DEFAULT +// RUN: %clang_cc1 -triple aarch64-linux-gnu -verify -emit-llvm-only %s -DCHECK_EXPLICIT_VERSION_PRIORITY +// RUN: %clang_cc1 -triple aarch64-linux-gnu -verify -emit-llvm-only %s -DCHECK_EXPLICIT_CLONES_PRIORITY #if defined(CHECK_IMPLICIT_DEFAULT) @@ -21,4 +23,18 @@ __attribute__((target_version("default"))) int explicit_default_bad(void) { retu // expected-note@-2 {{previous definition is here}} __attribute__((target_clones("aes", "lse", "default"))) int explicit_default_bad(void) { return 1; } +#elif defined(CHECK_EXPLICIT_VERSION_PRIORITY) + +__attribute__((target_version("aes"))) int explicit_version_priority(void) { return 0; } +// expected-error@+2 {{definition with same mangled name 'explicit_version_priority._Maes' as another definition}} +// expected-note@-2 {{previous definition is here}} +__attribute__((target_version("priority1+aes"))) int explicit_version_priority(void) { return 1; } + +#elif defined(CHECK_EXPLICIT_CLONES_PRIORITY) + +__attribute__((target_version("aes+priority2"))) int explicit_clones_priority(void) { return 0; } +// expected-error@+2 {{definition with same mangled name 'explicit_clones_priority._Maes' as another definition}} +// expected-note@-2 {{previous definition is here}} +__attribute__((target_clones("priority1+aes", "lse"))) int explicit_clones_priority(void) { return 1; } + #endif diff --git a/llvm/include/llvm/TargetParser/AArch64FeatPriorities.inc b/llvm/include/llvm/TargetParser/AArch64FeatPriorities.inc index f2bad28ada93e..cde0d16e0b32e 100644 --- a/llvm/include/llvm/TargetParser/AArch64FeatPriorities.inc +++ b/llvm/include/llvm/TargetParser/AArch64FeatPriorities.inc @@ -59,7 +59,12 @@ enum FeatPriorities { PRIOR_SME_I64, PRIOR_SME2, PRIOR_MOPS, - PRIOR_CSSC + PRIOR_CSSC, + PRIOR_5, + PRIOR_4, + PRIOR_3, + PRIOR_2, + PRIOR_1 }; #endif diff --git a/llvm/lib/Target/AArch64/AArch64FMV.td b/llvm/lib/Target/AArch64/AArch64FMV.td index b0f76ec6a6480..efcb6f552d788 100644 --- a/llvm/lib/Target/AArch64/AArch64FMV.td +++ b/llvm/lib/Target/AArch64/AArch64FMV.td @@ -83,3 +83,8 @@ def : FMVExtension<"sve2-sha3", "SVE_SHA3">; def : FMVExtension<"sve2-sm4", "SVE_SM4">; def : FMVExtension<"wfxt", "WFXT">; def : FMVExtension<"cssc", "CSSC">; +let FeatureBit = "FEAT_MAX" in def : FMVExtension<"priority1", "1">; +let FeatureBit = "FEAT_MAX" in def : FMVExtension<"priority2", "2">; +let FeatureBit = "FEAT_MAX" in def : FMVExtension<"priority3", "3">; +let FeatureBit = "FEAT_MAX" in def : FMVExtension<"priority4", "4">; +let FeatureBit = "FEAT_MAX" in def : FMVExtension<"priority5", "5">; diff --git a/llvm/lib/TargetParser/AArch64TargetParser.cpp b/llvm/lib/TargetParser/AArch64TargetParser.cpp index 4a2523440f0f0..612683dca9f34 100644 --- a/llvm/lib/TargetParser/AArch64TargetParser.cpp +++ b/llvm/lib/TargetParser/AArch64TargetParser.cpp @@ -58,18 +58,23 @@ std::optional<AArch64::FMVInfo> lookupFMVByID(AArch64::ArchExtKind ExtID) { uint64_t AArch64::getFMVPriority(ArrayRef<StringRef> Features) { // Transitively enable the Arch Extensions which correspond to each feature. ExtensionSet FeatureBits; + uint64_t PriorityMask = 0; for (const StringRef Feature : Features) { std::optional<FMVInfo> FMV = parseFMVExtension(Feature); if (!FMV && Feature.starts_with('+')) { if (std::optional<ExtensionInfo> Info = targetFeatureToExtension(Feature)) FMV = lookupFMVByID(Info->ID); } - if (FMV && FMV->ID) - FeatureBits.enable(*FMV->ID); + if (FMV) { + // FMV feature without a corresponding Arch Extension may affect priority + if (FMV->ID) + FeatureBits.enable(*FMV->ID); + else + PriorityMask |= (1ULL << FMV->PriorityBit); + } } // Construct a bitmask for all the transitively enabled Arch Extensions. - uint64_t PriorityMask = 0; for (const FMVInfo &Info : getFMVInfo()) if (Info.ID && FeatureBits.Enabled.test(*Info.ID)) PriorityMask |= (1ULL << Info.PriorityBit); >From c5e6d92d95cbac86060b2ae8fca703d77dbd58f0 Mon Sep 17 00:00:00 2001 From: Alexandros Lamprineas <alexandros.lamprin...@arm.com> Date: Fri, 27 Jun 2025 13:07:58 +0100 Subject: [PATCH 2/2] Adds support for static resolution of calls with explicit version priority. --- .../CodeGen/AArch64/fmv-explicit-priority.c | 193 ++++++++++++++++++ .../llvm/Analysis/TargetTransformInfo.h | 6 +- .../llvm/Analysis/TargetTransformInfoImpl.h | 1 + llvm/lib/Analysis/TargetTransformInfo.cpp | 4 + .../AArch64/AArch64TargetTransformInfo.cpp | 17 +- .../AArch64/AArch64TargetTransformInfo.h | 1 + llvm/lib/TargetParser/AArch64TargetParser.cpp | 22 +- llvm/lib/Transforms/IPO/GlobalOpt.cpp | 22 +- 8 files changed, 246 insertions(+), 20 deletions(-) create mode 100644 clang/test/CodeGen/AArch64/fmv-explicit-priority.c diff --git a/clang/test/CodeGen/AArch64/fmv-explicit-priority.c b/clang/test/CodeGen/AArch64/fmv-explicit-priority.c new file mode 100644 index 0000000000000..95a246fea425b --- /dev/null +++ b/clang/test/CodeGen/AArch64/fmv-explicit-priority.c @@ -0,0 +1,193 @@ +// 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 -O3 -fno-inline -emit-llvm -o - %s | FileCheck %s + +__attribute__((target_version("priority1+lse"))) int foo(void) { return 1; } +__attribute__((target_version("priority2+sve2"))) int foo(void) { return 2; } +__attribute__((target_version("priority3+sve"))) int foo(void) { return 3; } +__attribute__((target_version( "default"))) int foo(void) { return 0; } + +__attribute__((target_clones("priority1+lse+sve2", "priority2+lse", "priority3+sve", "default"))) +int fmv_caller(void) { return foo(); } + + +__attribute__((target_version("aes"))) int bar(void) { return 1; } +__attribute__((target_version("priority1+sm4"))) int bar(void) { return 2; } +__attribute__((target_version("default"))) int bar(void) { return 0; } + +__attribute__((target("aes"))) int regular_caller_aes() { return bar(); } +__attribute__((target("sm4"))) int regular_caller_sm4() { return bar(); } +//. +// CHECK: @__aarch64_cpu_features = external dso_local local_unnamed_addr global { i64 } +// CHECK: @foo = weak_odr ifunc i32 (), ptr @foo.resolver +// CHECK: @fmv_caller = weak_odr ifunc i32 (), ptr @fmv_caller.resolver +// CHECK: @bar = weak_odr ifunc i32 (), ptr @bar.resolver +//. +// CHECK: Function Attrs: mustprogress nofree noinline norecurse nosync nounwind willreturn memory(none) +// CHECK-LABEL: define {{[^@]+}}@foo._Mlse +// CHECK-SAME: () #[[ATTR0:[0-9]+]] { +// CHECK-NEXT: entry: +// CHECK-NEXT: ret i32 1 +// +// +// CHECK: Function Attrs: mustprogress nofree noinline norecurse nosync nounwind willreturn memory(none) vscale_range(1,16) +// CHECK-LABEL: define {{[^@]+}}@foo._Msve2 +// CHECK-SAME: () #[[ATTR1:[0-9]+]] { +// CHECK-NEXT: entry: +// CHECK-NEXT: ret i32 2 +// +// +// CHECK: Function Attrs: mustprogress nofree noinline norecurse nosync nounwind willreturn memory(none) vscale_range(1,16) +// CHECK-LABEL: define {{[^@]+}}@foo._Msve +// CHECK-SAME: () #[[ATTR2:[0-9]+]] { +// CHECK-NEXT: entry: +// CHECK-NEXT: ret i32 3 +// +// +// CHECK: Function Attrs: mustprogress nofree noinline norecurse nosync nounwind willreturn memory(none) +// CHECK-LABEL: define {{[^@]+}}@foo.default +// CHECK-SAME: () #[[ATTR3:[0-9]+]] { +// CHECK-NEXT: entry: +// CHECK-NEXT: ret i32 0 +// +// +// CHECK: Function Attrs: mustprogress nofree noinline norecurse nosync nounwind willreturn memory(none) vscale_range(1,16) +// CHECK-LABEL: define {{[^@]+}}@fmv_caller._MlseMsve2 +// CHECK-SAME: () #[[ATTR4:[0-9]+]] { +// CHECK-NEXT: entry: +// CHECK-NEXT: [[CALL:%.*]] = tail call i32 @foo._Mlse() +// CHECK-NEXT: ret i32 [[CALL]] +// +// +// CHECK: Function Attrs: mustprogress nofree noinline norecurse nosync nounwind willreturn memory(none) vscale_range(1,16) +// CHECK-LABEL: define {{[^@]+}}@fmv_caller._Mlse +// CHECK-SAME: () #[[ATTR5:[0-9]+]] { +// CHECK-NEXT: entry: +// CHECK-NEXT: [[CALL:%.*]] = tail call i32 @foo._Mlse() +// CHECK-NEXT: ret i32 [[CALL]] +// +// +// CHECK: Function Attrs: noinline nounwind vscale_range(1,16) +// CHECK-LABEL: define {{[^@]+}}@fmv_caller._Msve +// CHECK-SAME: () #[[ATTR6:[0-9]+]] { +// CHECK-NEXT: entry: +// CHECK-NEXT: [[CALL:%.*]] = tail call i32 @foo() #[[ATTR12:[0-9]+]] +// CHECK-NEXT: ret i32 [[CALL]] +// +// +// CHECK: Function Attrs: mustprogress nofree noinline norecurse nosync nounwind willreturn memory(none) vscale_range(1,16) +// CHECK-LABEL: define {{[^@]+}}@fmv_caller.default +// CHECK-SAME: () #[[ATTR7:[0-9]+]] { +// CHECK-NEXT: entry: +// CHECK-NEXT: [[CALL:%.*]] = tail call i32 @foo.default() +// CHECK-NEXT: ret i32 [[CALL]] +// +// +// CHECK: Function Attrs: mustprogress nofree noinline norecurse nosync nounwind willreturn memory(none) +// CHECK-LABEL: define {{[^@]+}}@bar._Maes +// CHECK-SAME: () #[[ATTR8:[0-9]+]] { +// CHECK-NEXT: entry: +// CHECK-NEXT: ret i32 1 +// +// +// CHECK: Function Attrs: mustprogress nofree noinline norecurse nosync nounwind willreturn memory(none) +// CHECK-LABEL: define {{[^@]+}}@bar._Msm4 +// CHECK-SAME: () #[[ATTR9:[0-9]+]] { +// CHECK-NEXT: entry: +// CHECK-NEXT: ret i32 2 +// +// +// CHECK: Function Attrs: mustprogress nofree noinline norecurse nosync nounwind willreturn memory(none) +// CHECK-LABEL: define {{[^@]+}}@bar.default +// CHECK-SAME: () #[[ATTR3]] { +// CHECK-NEXT: entry: +// CHECK-NEXT: ret i32 0 +// +// +// CHECK: Function Attrs: noinline nounwind +// CHECK-LABEL: define {{[^@]+}}@regular_caller_aes +// CHECK-SAME: () local_unnamed_addr #[[ATTR10:[0-9]+]] { +// CHECK-NEXT: entry: +// CHECK-NEXT: [[CALL:%.*]] = tail call i32 @bar() #[[ATTR12]] +// CHECK-NEXT: ret i32 [[CALL]] +// +// +// CHECK: Function Attrs: mustprogress nofree noinline norecurse nosync nounwind willreturn memory(none) +// CHECK-LABEL: define {{[^@]+}}@regular_caller_sm4 +// CHECK-SAME: () local_unnamed_addr #[[ATTR11:[0-9]+]] { +// CHECK-NEXT: entry: +// CHECK-NEXT: [[CALL:%.*]] = tail call i32 @bar._Msm4() +// CHECK-NEXT: ret i32 [[CALL]] +// +// +// CHECK-LABEL: define {{[^@]+}}@foo.resolver() comdat { +// CHECK-NEXT: resolver_entry: +// CHECK-NEXT: tail call void @__init_cpu_features_resolver() +// CHECK-NEXT: [[TMP0:%.*]] = load i64, ptr @__aarch64_cpu_features, align 8 +// CHECK-NEXT: [[TMP1:%.*]] = and i64 [[TMP0]], 128 +// CHECK-NEXT: [[DOTNOT:%.*]] = icmp eq i64 [[TMP1]], 0 +// CHECK-NEXT: br i1 [[DOTNOT]], label [[RESOLVER_ELSE:%.*]], label [[COMMON_RET:%.*]] +// CHECK: common.ret: +// CHECK-NEXT: [[COMMON_RET_OP:%.*]] = phi ptr [ @foo._Mlse, [[RESOLVER_ENTRY:%.*]] ], [ @foo._Msve2, [[RESOLVER_ELSE]] ], [ [[FOO__MSVE_FOO_DEFAULT:%.*]], [[RESOLVER_ELSE2:%.*]] ] +// CHECK-NEXT: ret ptr [[COMMON_RET_OP]] +// CHECK: resolver_else: +// CHECK-NEXT: [[TMP2:%.*]] = and i64 [[TMP0]], 69793284352 +// CHECK-NEXT: [[TMP3:%.*]] = icmp eq i64 [[TMP2]], 69793284352 +// CHECK-NEXT: br i1 [[TMP3]], label [[COMMON_RET]], label [[RESOLVER_ELSE2]] +// CHECK: resolver_else2: +// CHECK-NEXT: [[TMP4:%.*]] = and i64 [[TMP0]], 1073807616 +// CHECK-NEXT: [[TMP5:%.*]] = icmp eq i64 [[TMP4]], 1073807616 +// CHECK-NEXT: [[FOO__MSVE_FOO_DEFAULT]] = select i1 [[TMP5]], ptr @foo._Msve, ptr @foo.default +// CHECK-NEXT: br label [[COMMON_RET]] +// +// +// CHECK-LABEL: define {{[^@]+}}@fmv_caller.resolver() comdat { +// CHECK-NEXT: resolver_entry: +// CHECK-NEXT: tail call void @__init_cpu_features_resolver() +// CHECK-NEXT: [[TMP0:%.*]] = load i64, ptr @__aarch64_cpu_features, align 8 +// CHECK-NEXT: [[TMP1:%.*]] = and i64 [[TMP0]], 69793284480 +// CHECK-NEXT: [[TMP2:%.*]] = icmp eq i64 [[TMP1]], 69793284480 +// CHECK-NEXT: br i1 [[TMP2]], label [[COMMON_RET:%.*]], label [[RESOLVER_ELSE:%.*]] +// CHECK: common.ret: +// CHECK-NEXT: [[COMMON_RET_OP:%.*]] = phi ptr [ @fmv_caller._MlseMsve2, [[RESOLVER_ENTRY:%.*]] ], [ @fmv_caller._Mlse, [[RESOLVER_ELSE]] ], [ [[FMV_CALLER__MSVE_FMV_CALLER_DEFAULT:%.*]], [[RESOLVER_ELSE2:%.*]] ] +// CHECK-NEXT: ret ptr [[COMMON_RET_OP]] +// CHECK: resolver_else: +// CHECK-NEXT: [[TMP3:%.*]] = and i64 [[TMP0]], 128 +// CHECK-NEXT: [[DOTNOT:%.*]] = icmp eq i64 [[TMP3]], 0 +// CHECK-NEXT: br i1 [[DOTNOT]], label [[RESOLVER_ELSE2]], label [[COMMON_RET]] +// CHECK: resolver_else2: +// CHECK-NEXT: [[TMP4:%.*]] = and i64 [[TMP0]], 1073807616 +// CHECK-NEXT: [[TMP5:%.*]] = icmp eq i64 [[TMP4]], 1073807616 +// CHECK-NEXT: [[FMV_CALLER__MSVE_FMV_CALLER_DEFAULT]] = select i1 [[TMP5]], ptr @fmv_caller._Msve, ptr @fmv_caller.default +// CHECK-NEXT: br label [[COMMON_RET]] +// +// +// CHECK-LABEL: define {{[^@]+}}@bar.resolver() comdat { +// CHECK-NEXT: resolver_entry: +// CHECK-NEXT: tail call void @__init_cpu_features_resolver() +// CHECK-NEXT: [[TMP0:%.*]] = load i64, ptr @__aarch64_cpu_features, align 8 +// CHECK-NEXT: [[TMP1:%.*]] = and i64 [[TMP0]], 800 +// CHECK-NEXT: [[TMP2:%.*]] = icmp eq i64 [[TMP1]], 800 +// CHECK-NEXT: [[TMP3:%.*]] = and i64 [[TMP0]], 33536 +// CHECK-NEXT: [[TMP4:%.*]] = icmp eq i64 [[TMP3]], 33536 +// CHECK-NEXT: [[BAR__MAES_BAR_DEFAULT:%.*]] = select i1 [[TMP4]], ptr @bar._Maes, ptr @bar.default +// CHECK-NEXT: [[COMMON_RET_OP:%.*]] = select i1 [[TMP2]], ptr @bar._Msm4, ptr [[BAR__MAES_BAR_DEFAULT]] +// CHECK-NEXT: ret ptr [[COMMON_RET_OP]] +// +//. +// CHECK: attributes #[[ATTR0]] = { mustprogress nofree noinline norecurse nosync nounwind willreturn memory(none) "fmv-features"="lse,priority1" "no-trapping-math"="true" "stack-protector-buffer-size"="8" "target-features"="+lse" } +// CHECK: attributes #[[ATTR1]] = { mustprogress nofree noinline norecurse nosync nounwind willreturn memory(none) vscale_range(1,16) "fmv-features"="priority2,sve2" "no-trapping-math"="true" "stack-protector-buffer-size"="8" "target-features"="+fp-armv8,+fullfp16,+sve,+sve2" } +// CHECK: attributes #[[ATTR2]] = { mustprogress nofree noinline norecurse nosync nounwind willreturn memory(none) vscale_range(1,16) "fmv-features"="priority3,sve" "no-trapping-math"="true" "stack-protector-buffer-size"="8" "target-features"="+fp-armv8,+fullfp16,+sve" } +// CHECK: attributes #[[ATTR3]] = { mustprogress nofree noinline norecurse nosync nounwind willreturn memory(none) "fmv-features" "no-trapping-math"="true" "stack-protector-buffer-size"="8" } +// CHECK: attributes #[[ATTR4]] = { mustprogress nofree noinline norecurse nosync nounwind willreturn memory(none) vscale_range(1,16) "fmv-features"="lse,priority1,sve2" "no-trapping-math"="true" "stack-protector-buffer-size"="8" "target-features"="+fp-armv8,+fullfp16,+lse,+sve,+sve2" } +// CHECK: attributes #[[ATTR5]] = { mustprogress nofree noinline norecurse nosync nounwind willreturn memory(none) vscale_range(1,16) "fmv-features"="lse,priority2" "no-trapping-math"="true" "stack-protector-buffer-size"="8" "target-features"="+lse" } +// CHECK: attributes #[[ATTR6]] = { noinline nounwind vscale_range(1,16) "fmv-features"="priority3,sve" "no-trapping-math"="true" "stack-protector-buffer-size"="8" "target-features"="+fp-armv8,+fullfp16,+sve" } +// CHECK: attributes #[[ATTR7]] = { mustprogress nofree noinline norecurse nosync nounwind willreturn memory(none) vscale_range(1,16) "fmv-features" "no-trapping-math"="true" "stack-protector-buffer-size"="8" } +// CHECK: attributes #[[ATTR8]] = { mustprogress nofree noinline norecurse nosync nounwind willreturn memory(none) "fmv-features"="aes" "no-trapping-math"="true" "stack-protector-buffer-size"="8" "target-features"="+aes,+fp-armv8,+neon" } +// CHECK: attributes #[[ATTR9]] = { mustprogress nofree noinline norecurse nosync nounwind willreturn memory(none) "fmv-features"="priority1,sm4" "no-trapping-math"="true" "stack-protector-buffer-size"="8" "target-features"="+fp-armv8,+neon,+sm4" } +// CHECK: attributes #[[ATTR10]] = { noinline nounwind "no-trapping-math"="true" "stack-protector-buffer-size"="8" "target-features"="+aes,+fp-armv8,+neon" } +// CHECK: attributes #[[ATTR11]] = { mustprogress nofree noinline norecurse nosync nounwind willreturn memory(none) "no-trapping-math"="true" "stack-protector-buffer-size"="8" "target-features"="+fp-armv8,+neon,+sm4" } +// CHECK: attributes #[[ATTR12]] = { nounwind } +//. +// CHECK: [[META0:![0-9]+]] = !{i32 1, !"wchar_size", i32 4} +// CHECK: [[META1:![0-9]+]] = !{!"{{.*}}clang version {{.*}}"} +//. diff --git a/llvm/include/llvm/Analysis/TargetTransformInfo.h b/llvm/include/llvm/Analysis/TargetTransformInfo.h index 90d92e0fcf55c..c8e9a67b627f6 100644 --- a/llvm/include/llvm/Analysis/TargetTransformInfo.h +++ b/llvm/include/llvm/Analysis/TargetTransformInfo.h @@ -1916,9 +1916,13 @@ class TargetTransformInfo { LLVM_ABI bool hasArmWideBranch(bool Thumb) const; /// Returns a bitmask constructed from the target-features or fmv-features - /// metadata of a function. + /// metadata of a function corresponding to its Arch Extensions. LLVM_ABI uint64_t getFeatureMask(const Function &F) const; + /// Returns a bitmask constructed from the target-features or fmv-features + /// metadata of a function corresponding to its FMV priority. + LLVM_ABI uint64_t getPriorityMask(const Function &F) const; + /// Returns true if this is an instance of a function with multiple versions. LLVM_ABI bool isMultiversionedFunction(const Function &F) const; diff --git a/llvm/include/llvm/Analysis/TargetTransformInfoImpl.h b/llvm/include/llvm/Analysis/TargetTransformInfoImpl.h index c22928c9bcd94..628c92ddebd21 100644 --- a/llvm/include/llvm/Analysis/TargetTransformInfoImpl.h +++ b/llvm/include/llvm/Analysis/TargetTransformInfoImpl.h @@ -1126,6 +1126,7 @@ class TargetTransformInfoImplBase { virtual bool hasArmWideBranch(bool) const { return false; } virtual uint64_t getFeatureMask(const Function &F) const { return 0; } + virtual uint64_t getPriorityMask(const Function &F) const { return 0; } virtual bool isMultiversionedFunction(const Function &F) const { return false; diff --git a/llvm/lib/Analysis/TargetTransformInfo.cpp b/llvm/lib/Analysis/TargetTransformInfo.cpp index 3ebd9d487ba04..fb4002e277616 100644 --- a/llvm/lib/Analysis/TargetTransformInfo.cpp +++ b/llvm/lib/Analysis/TargetTransformInfo.cpp @@ -1426,6 +1426,10 @@ uint64_t TargetTransformInfo::getFeatureMask(const Function &F) const { return TTIImpl->getFeatureMask(F); } +uint64_t TargetTransformInfo::getPriorityMask(const Function &F) const { + return TTIImpl->getPriorityMask(F); +} + bool TargetTransformInfo::isMultiversionedFunction(const Function &F) const { return TTIImpl->isMultiversionedFunction(F); } diff --git a/llvm/lib/Target/AArch64/AArch64TargetTransformInfo.cpp b/llvm/lib/Target/AArch64/AArch64TargetTransformInfo.cpp index 3387dee8aa4c8..f920efc0386ea 100644 --- a/llvm/lib/Target/AArch64/AArch64TargetTransformInfo.cpp +++ b/llvm/lib/Target/AArch64/AArch64TargetTransformInfo.cpp @@ -249,12 +249,23 @@ static bool hasPossibleIncompatibleOps(const Function *F) { return false; } -uint64_t AArch64TTIImpl::getFeatureMask(const Function &F) const { +static void extractAttrFeatures(const Function &F, const AArch64TTIImpl *TTI, + SmallVectorImpl<StringRef> &Features) { StringRef AttributeStr = - isMultiversionedFunction(F) ? "fmv-features" : "target-features"; + TTI->isMultiversionedFunction(F) ? "fmv-features" : "target-features"; StringRef FeatureStr = F.getFnAttribute(AttributeStr).getValueAsString(); - SmallVector<StringRef, 8> Features; FeatureStr.split(Features, ","); +} + +uint64_t AArch64TTIImpl::getFeatureMask(const Function &F) const { + SmallVector<StringRef, 8> Features; + extractAttrFeatures(F, this, Features); + return AArch64::getCpuSupportsMask(Features); +} + +uint64_t AArch64TTIImpl::getPriorityMask(const Function &F) const { + SmallVector<StringRef, 8> Features; + extractAttrFeatures(F, this, Features); return AArch64::getFMVPriority(Features); } diff --git a/llvm/lib/Target/AArch64/AArch64TargetTransformInfo.h b/llvm/lib/Target/AArch64/AArch64TargetTransformInfo.h index 9ada70bd7086a..c653e06785eee 100644 --- a/llvm/lib/Target/AArch64/AArch64TargetTransformInfo.h +++ b/llvm/lib/Target/AArch64/AArch64TargetTransformInfo.h @@ -92,6 +92,7 @@ class AArch64TTIImpl final : public BasicTTIImplBase<AArch64TTIImpl> { unsigned DefaultCallPenalty) const override; uint64_t getFeatureMask(const Function &F) const override; + uint64_t getPriorityMask(const Function &F) const override; bool isMultiversionedFunction(const Function &F) const override; diff --git a/llvm/lib/TargetParser/AArch64TargetParser.cpp b/llvm/lib/TargetParser/AArch64TargetParser.cpp index 612683dca9f34..37d82abf34db8 100644 --- a/llvm/lib/TargetParser/AArch64TargetParser.cpp +++ b/llvm/lib/TargetParser/AArch64TargetParser.cpp @@ -55,17 +55,21 @@ std::optional<AArch64::FMVInfo> lookupFMVByID(AArch64::ArchExtKind ExtID) { return {}; } +std::optional<AArch64::FMVInfo> getFMVInfoFrom(StringRef Feature) { + std::optional<AArch64::FMVInfo> FMV = AArch64::parseFMVExtension(Feature); + if (!FMV && Feature.starts_with('+')) + if (std::optional<AArch64::ExtensionInfo> Ext = + AArch64::targetFeatureToExtension(Feature)) + FMV = lookupFMVByID(Ext->ID); + return FMV; +} + uint64_t AArch64::getFMVPriority(ArrayRef<StringRef> Features) { // Transitively enable the Arch Extensions which correspond to each feature. ExtensionSet FeatureBits; uint64_t PriorityMask = 0; for (const StringRef Feature : Features) { - std::optional<FMVInfo> FMV = parseFMVExtension(Feature); - if (!FMV && Feature.starts_with('+')) { - if (std::optional<ExtensionInfo> Info = targetFeatureToExtension(Feature)) - FMV = lookupFMVByID(Info->ID); - } - if (FMV) { + if (std::optional<FMVInfo> FMV = getFMVInfoFrom(Feature)) { // FMV feature without a corresponding Arch Extension may affect priority if (FMV->ID) FeatureBits.enable(*FMV->ID); @@ -86,9 +90,9 @@ uint64_t AArch64::getCpuSupportsMask(ArrayRef<StringRef> Features) { // Transitively enable the Arch Extensions which correspond to each feature. ExtensionSet FeatureBits; for (const StringRef Feature : Features) - if (std::optional<FMVInfo> Info = parseFMVExtension(Feature)) - if (Info->ID) - FeatureBits.enable(*Info->ID); + if (std::optional<FMVInfo> FMV = getFMVInfoFrom(Feature)) + if (FMV->ID) + FeatureBits.enable(*FMV->ID); // Construct a bitmask for all the transitively enabled Arch Extensions. uint64_t FeaturesMask = 0; diff --git a/llvm/lib/Transforms/IPO/GlobalOpt.cpp b/llvm/lib/Transforms/IPO/GlobalOpt.cpp index 7f5a2a982982d..9c467dc012a5a 100644 --- a/llvm/lib/Transforms/IPO/GlobalOpt.cpp +++ b/llvm/lib/Transforms/IPO/GlobalOpt.cpp @@ -2693,8 +2693,10 @@ static bool OptimizeNonTrivialIFuncs( Module &M, function_ref<TargetTransformInfo &(Function &)> GetTTI) { bool Changed = false; - // Cache containing the mask constructed from a function's target features. + // Cache containing the feature mask constructed from a function's metadata. DenseMap<Function *, uint64_t> FeatureMask; + // Cache containing the priority mask constructed from a function's metadata. + DenseMap<Function *, uint64_t> PriorityMask; for (GlobalIFunc &IF : M.ifuncs()) { if (IF.isInterposable()) @@ -2724,16 +2726,19 @@ static bool OptimizeNonTrivialIFuncs( LLVM_DEBUG(dbgs() << "Statically resolving calls to function " << Resolver->getName() << "\n"); - // Cache the feature mask for each callee. + // Cache the masks for each callee. for (Function *Callee : Callees) { - auto [It, Inserted] = FeatureMask.try_emplace(Callee); - if (Inserted) - It->second = TTI.getFeatureMask(*Callee); + auto [FeatIt, FeatInserted] = FeatureMask.try_emplace(Callee); + if (FeatInserted) + FeatIt->second = TTI.getFeatureMask(*Callee); + auto [PriorIt, PriorInserted] = PriorityMask.try_emplace(Callee); + if (PriorInserted) + PriorIt->second = TTI.getPriorityMask(*Callee); } // Sort the callee versions in decreasing priority order. sort(Callees, [&](auto *LHS, auto *RHS) { - return FeatureMask[LHS] > FeatureMask[RHS]; + return PriorityMask[LHS] > PriorityMask[RHS]; }); // Find the callsites and cache the feature mask for each caller. @@ -2746,6 +2751,9 @@ static bool OptimizeNonTrivialIFuncs( auto [FeatIt, FeatInserted] = FeatureMask.try_emplace(Caller); if (FeatInserted) FeatIt->second = TTI.getFeatureMask(*Caller); + auto [PriorIt, PriorInserted] = PriorityMask.try_emplace(Caller); + if (PriorInserted) + PriorIt->second = TTI.getPriorityMask(*Caller); auto [CallIt, CallInserted] = CallSites.try_emplace(Caller); if (CallInserted) Callers.push_back(Caller); @@ -2756,7 +2764,7 @@ static bool OptimizeNonTrivialIFuncs( // Sort the caller versions in decreasing priority order. sort(Callers, [&](auto *LHS, auto *RHS) { - return FeatureMask[LHS] > FeatureMask[RHS]; + return PriorityMask[LHS] > PriorityMask[RHS]; }); auto implies = [](uint64_t A, uint64_t B) { return (A & B) == B; }; _______________________________________________ cfe-commits mailing list cfe-commits@lists.llvm.org https://lists.llvm.org/cgi-bin/mailman/listinfo/cfe-commits
