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authordim <dim@FreeBSD.org>2016-12-26 20:36:37 +0000
committerdim <dim@FreeBSD.org>2016-12-26 20:36:37 +0000
commit06210ae42d418d50d8d9365d5c9419308ae9e7ee (patch)
treeab60b4cdd6e430dda1f292a46a77ddb744723f31 /contrib/llvm/tools/clang/lib/CodeGen/CoverageMappingGen.cpp
parent2dd166267f53df1c3748b4325d294b9b839de74b (diff)
downloadFreeBSD-src-06210ae42d418d50d8d9365d5c9419308ae9e7ee.zip
FreeBSD-src-06210ae42d418d50d8d9365d5c9419308ae9e7ee.tar.gz
MFC r309124:
Upgrade our copies of clang, llvm, lldb, compiler-rt and libc++ to 3.9.0 release, and add lld 3.9.0. Also completely revamp the build system for clang, llvm, lldb and their related tools. Please note that from 3.5.0 onwards, clang, llvm and lldb require C++11 support to build; see UPDATING for more information. Release notes for llvm, clang and lld are available here: <http://llvm.org/releases/3.9.0/docs/ReleaseNotes.html> <http://llvm.org/releases/3.9.0/tools/clang/docs/ReleaseNotes.html> <http://llvm.org/releases/3.9.0/tools/lld/docs/ReleaseNotes.html> Thanks to Ed Maste, Bryan Drewery, Andrew Turner, Antoine Brodin and Jan Beich for their help. Relnotes: yes MFC r309147: Pull in r282174 from upstream llvm trunk (by Krzysztof Parzyszek): [PPC] Set SP after loading data from stack frame, if no red zone is present Follow-up to r280705: Make sure that the SP is only restored after all data is loaded from the stack frame, if there is no red zone. This completes the fix for https://llvm.org/bugs/show_bug.cgi?id=26519. Differential Revision: https://reviews.llvm.org/D24466 Reported by: Mark Millard PR: 214433 MFC r309149: Pull in r283060 from upstream llvm trunk (by Hal Finkel): [PowerPC] Refactor soft-float support, and enable PPC64 soft float This change enables soft-float for PowerPC64, and also makes soft-float disable all vector instruction sets for both 32-bit and 64-bit modes. This latter part is necessary because the PPC backend canonicalizes many Altivec vector types to floating-point types, and so soft-float breaks scalarization support for many operations. Both for embedded targets and for operating-system kernels desiring soft-float support, it seems reasonable that disabling hardware floating-point also disables vector instructions (embedded targets without hardware floating point support are unlikely to have Altivec, etc. and operating system kernels desiring not to use floating-point registers to lower syscall cost are unlikely to want to use vector registers either). If someone needs this to work, we'll need to change the fact that we promote many Altivec operations to act on v4f32. To make it possible to disable Altivec when soft-float is enabled, hardware floating-point support needs to be expressed as a positive feature, like the others, and not a negative feature, because target features cannot have dependencies on the disabling of some other feature. So +soft-float has now become -hard-float. Fixes PR26970. Pull in r283061 from upstream clang trunk (by Hal Finkel): [PowerPC] Enable soft-float for PPC64, and +soft-float -> -hard-float Enable soft-float support on PPC64, as the backend now supports it. Also, the backend now uses -hard-float instead of +soft-float, so set the target features accordingly. Fixes PR26970. Reported by: Mark Millard PR: 214433 MFC r309212: Add a few missed clang 3.9.0 files to OptionalObsoleteFiles. MFC r309262: Fix packaging for clang, lldb and lld 3.9.0 During the upgrade of clang/llvm etc to 3.9.0 in r309124, the PACKAGE directive in the usr.bin/clang/*.mk files got dropped accidentally. Restore it, with a few minor changes and additions: * Correct license in clang.ucl to NCSA * Add PACKAGE=clang for clang and most of the "ll" tools * Put lldb in its own package * Put lld in its own package Reviewed by: gjb, jmallett Differential Revision: https://reviews.freebsd.org/D8666 MFC r309656: During the bootstrap phase, when building the minimal llvm library on PowerPC, add lib/Support/Atomic.cpp. This is needed because upstream llvm revision r271821 disabled the use of std::call_once, which causes some fallback functions from Atomic.cpp to be used instead. Reported by: Mark Millard PR: 214902 MFC r309835: Tentatively apply https://reviews.llvm.org/D18730 to work around gcc PR 70528 (bogus error: constructor required before non-static data member). This should fix buildworld with the external gcc package. Reported by: https://jenkins.freebsd.org/job/FreeBSD_HEAD_amd64_gcc/ MFC r310194: Upgrade our copies of clang, llvm, lld, lldb, compiler-rt and libc++ to 3.9.1 release. Please note that from 3.5.0 onwards, clang, llvm and lldb require C++11 support to build; see UPDATING for more information. Release notes for llvm, clang and lld will be available here: <http://releases.llvm.org/3.9.1/docs/ReleaseNotes.html> <http://releases.llvm.org/3.9.1/tools/clang/docs/ReleaseNotes.html> <http://releases.llvm.org/3.9.1/tools/lld/docs/ReleaseNotes.html> Relnotes: yes
Diffstat (limited to 'contrib/llvm/tools/clang/lib/CodeGen/CoverageMappingGen.cpp')
-rw-r--r--contrib/llvm/tools/clang/lib/CodeGen/CoverageMappingGen.cpp137
1 files changed, 99 insertions, 38 deletions
diff --git a/contrib/llvm/tools/clang/lib/CodeGen/CoverageMappingGen.cpp b/contrib/llvm/tools/clang/lib/CodeGen/CoverageMappingGen.cpp
index 03e22cd..b011a0f 100644
--- a/contrib/llvm/tools/clang/lib/CodeGen/CoverageMappingGen.cpp
+++ b/contrib/llvm/tools/clang/lib/CodeGen/CoverageMappingGen.cpp
@@ -15,10 +15,12 @@
#include "CodeGenFunction.h"
#include "clang/AST/StmtVisitor.h"
#include "clang/Lex/Lexer.h"
+#include "llvm/ADT/SmallSet.h"
+#include "llvm/ADT/StringExtras.h"
#include "llvm/ADT/Optional.h"
-#include "llvm/ProfileData/CoverageMapping.h"
-#include "llvm/ProfileData/CoverageMappingReader.h"
-#include "llvm/ProfileData/CoverageMappingWriter.h"
+#include "llvm/ProfileData/Coverage/CoverageMapping.h"
+#include "llvm/ProfileData/Coverage/CoverageMappingReader.h"
+#include "llvm/ProfileData/Coverage/CoverageMappingWriter.h"
#include "llvm/ProfileData/InstrProfReader.h"
#include "llvm/Support/FileSystem.h"
@@ -128,6 +130,16 @@ public:
return strcmp(SM.getBufferName(SM.getSpellingLoc(Loc)), "<built-in>") == 0;
}
+ /// \brief Check whether \c Loc is included or expanded from \c Parent.
+ bool isNestedIn(SourceLocation Loc, FileID Parent) {
+ do {
+ Loc = getIncludeOrExpansionLoc(Loc);
+ if (Loc.isInvalid())
+ return false;
+ } while (!SM.isInFileID(Loc, Parent));
+ return true;
+ }
+
/// \brief Get the start of \c S ignoring macro arguments and builtin macros.
SourceLocation getStart(const Stmt *S) {
SourceLocation Loc = S->getLocStart();
@@ -152,14 +164,17 @@ public:
void gatherFileIDs(SmallVectorImpl<unsigned> &Mapping) {
FileIDMapping.clear();
- SmallVector<FileID, 8> Visited;
+ llvm::SmallSet<FileID, 8> Visited;
SmallVector<std::pair<SourceLocation, unsigned>, 8> FileLocs;
for (const auto &Region : SourceRegions) {
SourceLocation Loc = Region.getStartLoc();
FileID File = SM.getFileID(Loc);
- if (std::find(Visited.begin(), Visited.end(), File) != Visited.end())
+ if (!Visited.insert(File).second)
+ continue;
+
+ // Do not map FileID's associated with system headers.
+ if (SM.isInSystemHeader(SM.getSpellingLoc(Loc)))
continue;
- Visited.push_back(File);
unsigned Depth = 0;
for (SourceLocation Parent = getIncludeOrExpansionLoc(Loc);
@@ -191,12 +206,6 @@ public:
return None;
}
- /// \brief Return true if the given clang's file id has a corresponding
- /// coverage file id.
- bool hasExistingCoverageFileID(FileID File) const {
- return FileIDMapping.count(File);
- }
-
/// \brief Gather all the regions that were skipped by the preprocessor
/// using the constructs like #if.
void gatherSkippedRegions() {
@@ -246,6 +255,10 @@ public:
SourceLocation LocStart = Region.getStartLoc();
assert(SM.getFileID(LocStart).isValid() && "region in invalid file");
+ // Ignore regions from system headers.
+ if (SM.isInSystemHeader(SM.getSpellingLoc(LocStart)))
+ continue;
+
auto CovFileID = getCoverageFileID(LocStart);
// Ignore regions that don't have a file, such as builtin macros.
if (!CovFileID)
@@ -309,7 +322,27 @@ struct EmptyCoverageMappingBuilder : public CoverageMappingBuilder {
if (!D->hasBody())
return;
auto Body = D->getBody();
- SourceRegions.emplace_back(Counter(), getStart(Body), getEnd(Body));
+ SourceLocation Start = getStart(Body);
+ SourceLocation End = getEnd(Body);
+ if (!SM.isWrittenInSameFile(Start, End)) {
+ // Walk up to find the common ancestor.
+ // Correct the locations accordingly.
+ FileID StartFileID = SM.getFileID(Start);
+ FileID EndFileID = SM.getFileID(End);
+ while (StartFileID != EndFileID && !isNestedIn(End, StartFileID)) {
+ Start = getIncludeOrExpansionLoc(Start);
+ assert(Start.isValid() &&
+ "Declaration start location not nested within a known region");
+ StartFileID = SM.getFileID(Start);
+ }
+ while (StartFileID != EndFileID) {
+ End = getPreciseTokenLocEnd(getIncludeOrExpansionLoc(End));
+ assert(End.isValid() &&
+ "Declaration end location not nested within a known region");
+ EndFileID = SM.getFileID(End);
+ }
+ }
+ SourceRegions.emplace_back(Counter(), Start, End);
}
/// \brief Write the mapping data to the output stream
@@ -318,6 +351,9 @@ struct EmptyCoverageMappingBuilder : public CoverageMappingBuilder {
gatherFileIDs(FileIDMapping);
emitSourceRegions();
+ if (MappingRegions.empty())
+ return;
+
CoverageMappingWriter Writer(FileIDMapping, None, MappingRegions);
Writer.write(OS);
}
@@ -356,10 +392,6 @@ struct CounterCoverageMappingBuilder
return addCounters(addCounters(C1, C2), C3);
}
- Counter addCounters(Counter C1, Counter C2, Counter C3, Counter C4) {
- return addCounters(addCounters(C1, C2, C3), C4);
- }
-
/// \brief Return the region counter for the given statement.
///
/// This should only be called on statements that have a dedicated counter.
@@ -433,31 +465,43 @@ struct CounterCoverageMappingBuilder
Visit(S);
Counter ExitCount = getRegion().getCounter();
popRegions(Index);
+
+ // The statement may be spanned by an expansion. Make sure we handle a file
+ // exit out of this expansion before moving to the next statement.
+ if (SM.isBeforeInTranslationUnit(getStart(S), S->getLocStart()))
+ MostRecentLocation = getEnd(S);
+
return ExitCount;
}
+ /// \brief Check whether a region with bounds \c StartLoc and \c EndLoc
+ /// is already added to \c SourceRegions.
+ bool isRegionAlreadyAdded(SourceLocation StartLoc, SourceLocation EndLoc) {
+ return SourceRegions.rend() !=
+ std::find_if(SourceRegions.rbegin(), SourceRegions.rend(),
+ [&](const SourceMappingRegion &Region) {
+ return Region.getStartLoc() == StartLoc &&
+ Region.getEndLoc() == EndLoc;
+ });
+ }
+
/// \brief Adjust the most recently visited location to \c EndLoc.
///
/// This should be used after visiting any statements in non-source order.
void adjustForOutOfOrderTraversal(SourceLocation EndLoc) {
MostRecentLocation = EndLoc;
- // Avoid adding duplicate regions if we have a completed region on the top
- // of the stack and are adjusting to the end of a virtual file.
+ // The code region for a whole macro is created in handleFileExit() when
+ // it detects exiting of the virtual file of that macro. If we visited
+ // statements in non-source order, we might already have such a region
+ // added, for example, if a body of a loop is divided among multiple
+ // macros. Avoid adding duplicate regions in such case.
if (getRegion().hasEndLoc() &&
- MostRecentLocation == getEndOfFileOrMacro(MostRecentLocation))
+ MostRecentLocation == getEndOfFileOrMacro(MostRecentLocation) &&
+ isRegionAlreadyAdded(getStartOfFileOrMacro(MostRecentLocation),
+ MostRecentLocation))
MostRecentLocation = getIncludeOrExpansionLoc(MostRecentLocation);
}
- /// \brief Check whether \c Loc is included or expanded from \c Parent.
- bool isNestedIn(SourceLocation Loc, FileID Parent) {
- do {
- Loc = getIncludeOrExpansionLoc(Loc);
- if (Loc.isInvalid())
- return false;
- } while (!SM.isInFileID(Loc, Parent));
- return true;
- }
-
/// \brief Adjust regions and state when \c NewLoc exits a file.
///
/// If moving from our most recently tracked location to \c NewLoc exits any
@@ -563,6 +607,9 @@ struct CounterCoverageMappingBuilder
emitExpansionRegions();
gatherSkippedRegions();
+ if (MappingRegions.empty())
+ return;
+
CoverageMappingWriter Writer(VirtualFileMapping, Builder.getExpressions(),
MappingRegions);
Writer.write(OS);
@@ -579,6 +626,11 @@ struct CounterCoverageMappingBuilder
void VisitDecl(const Decl *D) {
Stmt *Body = D->getBody();
+
+ // Do not propagate region counts into system headers.
+ if (Body && SM.isInSystemHeader(SM.getSpellingLoc(getStart(Body))))
+ return;
+
propagateCounts(getRegionCounter(Body), Body);
}
@@ -769,7 +821,9 @@ struct CounterCoverageMappingBuilder
BreakContinueStack.back().ContinueCount, BC.ContinueCount);
Counter ExitCount = getRegionCounter(S);
- pushRegion(ExitCount);
+ SourceLocation ExitLoc = getEnd(S);
+ pushRegion(ExitCount, getStart(S), ExitLoc);
+ handleFileExit(ExitLoc);
}
void VisitSwitchCase(const SwitchCase *S) {
@@ -822,7 +876,12 @@ struct CounterCoverageMappingBuilder
void VisitCXXTryStmt(const CXXTryStmt *S) {
extendRegion(S);
- Visit(S->getTryBlock());
+ // Handle macros that generate the "try" but not the rest.
+ extendRegion(S->getTryBlock());
+
+ Counter ParentCount = getRegion().getCounter();
+ propagateCounts(ParentCount, S->getTryBlock());
+
for (unsigned I = 0, E = S->getNumHandlers(); I < E; ++I)
Visit(S->getHandler(I));
@@ -911,7 +970,7 @@ static void dump(llvm::raw_ostream &OS, StringRef FunctionName,
void CoverageMappingModuleGen::addFunctionMappingRecord(
llvm::GlobalVariable *NamePtr, StringRef NameValue, uint64_t FuncHash,
- const std::string &CoverageMapping, bool isUsed) {
+ const std::string &CoverageMapping, bool IsUsed) {
llvm::LLVMContext &Ctx = CGM.getLLVMContext();
if (!FunctionRecordTy) {
#define COVMAP_FUNC_RECORD(Type, LLVMType, Name, Init) LLVMType,
@@ -929,10 +988,10 @@ void CoverageMappingModuleGen::addFunctionMappingRecord(
};
FunctionRecords.push_back(llvm::ConstantStruct::get(
FunctionRecordTy, makeArrayRef(FunctionRecordVals)));
- if (!isUsed)
+ if (!IsUsed)
FunctionNames.push_back(
llvm::ConstantExpr::getBitCast(NamePtr, llvm::Type::getInt8PtrTy(Ctx)));
- CoverageMappings += CoverageMapping;
+ CoverageMappings.push_back(CoverageMapping);
if (CGM.getCodeGenOpts().DumpCoverageMapping) {
// Dump the coverage mapping data for this function by decoding the
@@ -978,8 +1037,10 @@ void CoverageMappingModuleGen::emit() {
std::string FilenamesAndCoverageMappings;
llvm::raw_string_ostream OS(FilenamesAndCoverageMappings);
CoverageFilenamesSectionWriter(FilenameRefs).write(OS);
- OS << CoverageMappings;
- size_t CoverageMappingSize = CoverageMappings.size();
+ std::string RawCoverageMappings =
+ llvm::join(CoverageMappings.begin(), CoverageMappings.end(), "");
+ OS << RawCoverageMappings;
+ size_t CoverageMappingSize = RawCoverageMappings.size();
size_t FilenamesSize = OS.str().size() - CoverageMappingSize;
// Append extra zeroes if necessary to ensure that the size of the filenames
// and coverage mappings is a multiple of 8.
@@ -1035,7 +1096,7 @@ void CoverageMappingModuleGen::emit() {
// to pass the list of names referenced to codegen.
new llvm::GlobalVariable(CGM.getModule(), NamesArrTy, true,
llvm::GlobalValue::InternalLinkage, NamesArrVal,
- llvm::getCoverageNamesVarName());
+ llvm::getCoverageUnusedNamesVarName());
}
}
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