steplong updated this revision to Diff 428456.
steplong added a comment.
- Changed pragma-ms-functions.c to only check that the no-builtin attributes
are added to the functions
- Moved pragma handler to Parser
- Changed scope check to only file scope. MSVC accepts stuff like that we don't:
struct S {
int a;
#pragma function(memset)
};
Repository:
rG LLVM Github Monorepo
CHANGES SINCE LAST ACTION
https://reviews.llvm.org/D124702/new/
https://reviews.llvm.org/D124702
Files:
clang/include/clang/Basic/DiagnosticSemaKinds.td
clang/include/clang/Parse/Parser.h
clang/include/clang/Sema/Sema.h
clang/lib/Parse/ParsePragma.cpp
clang/lib/Sema/SemaAttr.cpp
clang/lib/Sema/SemaDecl.cpp
clang/test/CodeGen/pragma-ms-function.c
clang/test/Preprocessor/pragma_microsoft.c
Index: clang/test/Preprocessor/pragma_microsoft.c
===================================================================
--- clang/test/Preprocessor/pragma_microsoft.c
+++ clang/test/Preprocessor/pragma_microsoft.c
@@ -201,6 +201,26 @@
#pragma clang diagnostic pop
#pragma intrinsic(asdf) // expected-warning {{'asdf' is not a recognized builtin; consider including <intrin.h>}}
+// Test pragma function
+#pragma function(memset) // no-warning
+#pragma function(memcpy, strlen, strlen) // no-warning
+#pragma function() // no-warning
+#pragma function(asdf) // expected-warning {{'asdf' is not a recognized builtin; consider including <intrin.h>}}
+#pragma function(main) // expected-warning {{'main' is not a recognized builtin; consider including <intrin.h>}}
+#pragma function( // expected-warning {{missing ')' after}}
+#pragma function(int) // expected-warning {{missing ')' after}}
+#pragma function(strcmp) asdf // expected-warning {{extra tokens at end}}
+
+#define __INTRIN_H // there should be no notes after defining __INTRIN_H
+#pragma function(asdf) // expected-warning-re {{'asdf' is not a recognized builtin{{$}}}}
+#pragma function(memset) // no-warning
+#undef __INTRIN_H
+#pragma function(asdf) // expected-warning {{'asdf' is not a recognized builtin; consider including <intrin.h>}}
+
+void pragma_function_foo() {
+#pragma function(memset) // expected-error {{'#pragma function' can only appear at file scope}}
+}
+
#pragma optimize // expected-warning{{missing '(' after '#pragma optimize'}}
#pragma optimize( // expected-warning{{expected string literal in '#pragma optimize'}}
#pragma optimize(a // expected-warning{{expected string literal in '#pragma optimize'}}
Index: clang/test/CodeGen/pragma-ms-function.c
===================================================================
--- /dev/null
+++ clang/test/CodeGen/pragma-ms-function.c
@@ -0,0 +1,38 @@
+// RUN: %clang_cc1 -emit-llvm -fms-extensions -o - %s | FileCheck %s
+
+typedef typeof(sizeof(0)) size_t;
+
+void bar(char *s);
+void *memset(void *s, int c, size_t n);
+void *memcpy(void *d, const void *s, size_t n);
+
+// CHECK: define{{.*}} void @foo1({{.*}}) #[[NO_NOBUILTIN:[0-9]+]]
+void foo1(char *s, char *d, size_t n) {
+ bar(s);
+ memset(s, 0, n);
+ memcpy(d, s, n);
+}
+
+#pragma function(strlen, memset)
+
+// CHECK: define{{.*}} void @foo2({{.*}}) #[[NOBUILTIN_MEMSET:[0-9]+]]
+void foo2(char *s, char *d, size_t n) {
+ bar(s);
+ memset(s, 1, n);
+ memcpy(d, s, n);
+}
+
+#pragma function(memcpy)
+
+// CHECK: define{{.*}} void @foo3({{.*}}) #[[NOBUILTIN_MEMSET_MEMCPY:[0-9]+]]
+void foo3(char *s, char *d, size_t n) {
+ bar(s);
+ memset(s, 2, n);
+ memcpy(d, s, n);
+}
+
+// CHECK-NOT: attributes #[[NO_NOBUILTIN]] = {{{.*}}"no-builtin-memset"{{.*}}}
+// CHECK-NOT: attributes #[[NO_NOBUILTIN]] = {{{.*}}"no-builtin-memcpy"{{.*}}"no-builtin-memset"{{.*}}}
+// CHECK: attributes #[[NOBUILTIN_MEMSET]] = {{{.*}}"no-builtin-memset"{{.*}}}
+// CHECK-NOT: attributes #[[NOBUILTIN_MEMSET]] = {{{.*}}"no-builtin-memcpy"{{.*}}"no-builtin-memset"{{.*}}}
+// CHECK: attributes #[[NOBUILTIN_MEMSET_MEMCPY]] = {{{.*}}"no-builtin-memcpy"{{.*}}"no-builtin-memset"{{.*}}}
Index: clang/lib/Sema/SemaDecl.cpp
===================================================================
--- clang/lib/Sema/SemaDecl.cpp
+++ clang/lib/Sema/SemaDecl.cpp
@@ -10218,10 +10218,12 @@
// marking the function.
AddCFAuditedAttribute(NewFD);
- // If this is a function definition, check if we have to apply optnone due to
- // a pragma.
- if(D.isFunctionDefinition())
+ // If this is a function definition, check if we have to apply any
+ // attributes (i.e. optnone and no_builtin) due to a pragma.
+ if (D.isFunctionDefinition()) {
AddRangeBasedOptnone(NewFD);
+ AddRangeBasedNoBuiltin(NewFD);
+ }
// If this is the first declaration of an extern C variable, update
// the map of such variables.
Index: clang/lib/Sema/SemaAttr.cpp
===================================================================
--- clang/lib/Sema/SemaAttr.cpp
+++ clang/lib/Sema/SemaAttr.cpp
@@ -1065,6 +1065,16 @@
OptimizeOffPragmaLocation = PragmaLoc;
}
+void Sema::ActOnPragmaMSFunction(
+ SourceLocation Loc, const llvm::SmallVectorImpl<StringRef> &NoBuiltins) {
+ if (!CurContext->getRedeclContext()->isFileContext()) {
+ Diag(Loc, diag::err_pragma_intrinsic_function_scope) << "function";
+ return;
+ }
+
+ MSFunctionNoBuiltins.insert(NoBuiltins.begin(), NoBuiltins.end());
+}
+
void Sema::AddRangeBasedOptnone(FunctionDecl *FD) {
// In the future, check other pragmas if they're implemented (e.g. pragma
// optimize 0 will probably map to this functionality too).
@@ -1086,6 +1096,13 @@
FD->addAttr(NoInlineAttr::CreateImplicit(Context, Loc));
}
+void Sema::AddRangeBasedNoBuiltin(FunctionDecl *FD) {
+ SmallVector<StringRef> V(MSFunctionNoBuiltins.begin(),
+ MSFunctionNoBuiltins.end());
+ if (!MSFunctionNoBuiltins.empty())
+ FD->addAttr(NoBuiltinAttr::CreateImplicit(Context, V.data(), V.size()));
+}
+
typedef std::vector<std::pair<unsigned, SourceLocation> > VisStack;
enum : unsigned { NoVisibility = ~0U };
Index: clang/lib/Parse/ParsePragma.cpp
===================================================================
--- clang/lib/Parse/ParsePragma.cpp
+++ clang/lib/Parse/ParsePragma.cpp
@@ -445,6 +445,8 @@
PP.AddPragmaHandler(MSCodeSeg.get());
MSSection = std::make_unique<PragmaMSPragma>("section");
PP.AddPragmaHandler(MSSection.get());
+ MSFunction = std::make_unique<PragmaMSPragma>("function");
+ PP.AddPragmaHandler(MSFunction.get());
MSRuntimeChecks = std::make_unique<PragmaMSRuntimeChecksHandler>();
PP.AddPragmaHandler(MSRuntimeChecks.get());
MSIntrinsic = std::make_unique<PragmaMSIntrinsicHandler>();
@@ -554,6 +556,8 @@
MSCodeSeg.reset();
PP.RemovePragmaHandler(MSSection.get());
MSSection.reset();
+ PP.RemovePragmaHandler(MSFunction.get());
+ MSFunction.reset();
PP.RemovePragmaHandler(MSRuntimeChecks.get());
MSRuntimeChecks.reset();
PP.RemovePragmaHandler(MSIntrinsic.get());
@@ -912,7 +916,8 @@
.Case("const_seg", &Parser::HandlePragmaMSSegment)
.Case("code_seg", &Parser::HandlePragmaMSSegment)
.Case("section", &Parser::HandlePragmaMSSection)
- .Case("init_seg", &Parser::HandlePragmaMSInitSeg);
+ .Case("init_seg", &Parser::HandlePragmaMSInitSeg)
+ .Case("function", &Parser::HandlePragmaMSFunction);
if (!(this->*Handler)(PragmaName, PragmaLocation)) {
// Pragma handling failed, and has been diagnosed. Slurp up the tokens
@@ -3547,6 +3552,41 @@
<< "intrinsic";
}
+bool Parser::HandlePragmaMSFunction(StringRef PragmaName,
+ SourceLocation PragmaLocation) {
+ Token FirstTok = Tok;
+
+ if (ExpectAndConsume(tok::l_paren, diag::warn_pragma_expected_lparen,
+ PragmaName))
+ return false;
+
+ bool SuggestIntrinH = !PP.isMacroDefined("__INTRIN_H");
+
+ llvm::SmallVector<StringRef> NoBuiltins;
+ while (Tok.is(tok::identifier)) {
+ IdentifierInfo *II = Tok.getIdentifierInfo();
+ if (!II->getBuiltinID())
+ PP.Diag(Tok.getLocation(), diag::warn_pragma_intrinsic_builtin)
+ << II << SuggestIntrinH;
+ else
+ NoBuiltins.emplace_back(II->getName());
+
+ PP.Lex(Tok);
+ if (Tok.isNot(tok::comma))
+ break;
+ PP.Lex(Tok); // ,
+ }
+
+ if (ExpectAndConsume(tok::r_paren, diag::warn_pragma_expected_rparen,
+ PragmaName) ||
+ ExpectAndConsume(tok::eof, diag::warn_pragma_extra_tokens_at_eol,
+ PragmaName))
+ return false;
+
+ Actions.ActOnPragmaMSFunction(FirstTok.getLocation(), NoBuiltins);
+ return true;
+}
+
// #pragma optimize("gsty", on|off)
void PragmaMSOptimizeHandler::HandlePragma(Preprocessor &PP,
PragmaIntroducer Introducer,
Index: clang/include/clang/Sema/Sema.h
===================================================================
--- clang/include/clang/Sema/Sema.h
+++ clang/include/clang/Sema/Sema.h
@@ -755,6 +755,9 @@
/// optimizations are currently "on", this is set to an invalid location.
SourceLocation OptimizeOffPragmaLocation;
+ /// Set of no-builtin functions listed by \#pragma function.
+ llvm::SmallSetVector<StringRef, 4> MSFunctionNoBuiltins;
+
/// Flag indicating if Sema is building a recovery call expression.
///
/// This flag is used to avoid building recovery call expressions
@@ -10322,6 +10325,11 @@
/// Called on well formed \#pragma clang optimize.
void ActOnPragmaOptimize(bool On, SourceLocation PragmaLoc);
+ /// Call on well formed \#pragma function.
+ void
+ ActOnPragmaMSFunction(SourceLocation Loc,
+ const llvm::SmallVectorImpl<StringRef> &NoBuiltins);
+
/// Get the location for the currently active "\#pragma clang optimize
/// off". If this location is invalid, then the state of the pragma is "on".
SourceLocation getOptimizeOffPragmaLocation() const {
@@ -10338,6 +10346,11 @@
/// attribute to be added (usually because of a pragma).
void AddOptnoneAttributeIfNoConflicts(FunctionDecl *FD, SourceLocation Loc);
+ /// Only called on function definitions; if there is a pragma in scope
+ /// with the effect of a range-based no_builtin, consider marking the function
+ /// with attribute no_builtin.
+ void AddRangeBasedNoBuiltin(FunctionDecl *FD);
+
/// AddAlignedAttr - Adds an aligned attribute to a particular declaration.
void AddAlignedAttr(Decl *D, const AttributeCommonInfo &CI, Expr *E,
bool IsPackExpansion);
Index: clang/include/clang/Parse/Parser.h
===================================================================
--- clang/include/clang/Parse/Parser.h
+++ clang/include/clang/Parse/Parser.h
@@ -196,6 +196,7 @@
std::unique_ptr<PragmaHandler> MSSection;
std::unique_ptr<PragmaHandler> MSRuntimeChecks;
std::unique_ptr<PragmaHandler> MSIntrinsic;
+ std::unique_ptr<PragmaHandler> MSFunction;
std::unique_ptr<PragmaHandler> MSOptimize;
std::unique_ptr<PragmaHandler> MSFenvAccess;
std::unique_ptr<PragmaHandler> CUDAForceHostDeviceHandler;
@@ -722,6 +723,8 @@
SourceLocation PragmaLocation);
bool HandlePragmaMSInitSeg(StringRef PragmaName,
SourceLocation PragmaLocation);
+ bool HandlePragmaMSFunction(StringRef PragmaName,
+ SourceLocation PragmaLocation);
/// Handle the annotation token produced for
/// #pragma align...
Index: clang/include/clang/Basic/DiagnosticSemaKinds.td
===================================================================
--- clang/include/clang/Basic/DiagnosticSemaKinds.td
+++ clang/include/clang/Basic/DiagnosticSemaKinds.td
@@ -988,6 +988,9 @@
def err_super_in_lambda_unsupported : Error<
"use of '__super' inside a lambda is unsupported">;
+def err_pragma_intrinsic_function_scope : Error<
+ "'#pragma %0' can only appear at file scope">;
+
def warn_pragma_unused_undeclared_var : Warning<
"undeclared variable %0 used as an argument for '#pragma unused'">,
InGroup<IgnoredPragmas>;
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