[clang] Remove redundant calls to c_str() (NFC)

Identified with readability-redundant-string-cstr.

Author: kazutakahirata

clang/lib/CodeGen/CGOpenMPRuntime.cpp

@@ -1448,8 +1448,8 @@ llvm::Value *CGOpenMPRuntime::emitUpdateLocation(CodeGenFunction &CGF,
     const char *FileName = PLoc.getFilename();
     unsigned Line = PLoc.getLine();
     unsigned Column = PLoc.getColumn();
-    SrcLocStr = OMPBuilder.getOrCreateSrcLocStr(FunctionName.c_str(), FileName,
-                                                Line, Column);
+    SrcLocStr =
+        OMPBuilder.getOrCreateSrcLocStr(FunctionName, FileName, Line, Column);
   }
   unsigned Reserved2Flags = getDefaultLocationReserved2Flags();
   return OMPBuilder.getOrCreateIdent(SrcLocStr, llvm::omp::IdentFlag(Flags),

clang/lib/Driver/Compilation.cpp

@@ -174,7 +174,7 @@ int Compilation::ExecuteCommand(const Command &C,
         !getDriver().CCPrintOptionsFilename.empty()) {
       std::error_code EC;
       OwnedStream.reset(new llvm::raw_fd_ostream(
-          getDriver().CCPrintOptionsFilename.c_str(), EC,
+          getDriver().CCPrintOptionsFilename, EC,
           llvm::sys::fs::OF_Append | llvm::sys::fs::OF_TextWithCRLF));
       if (EC) {
         getDriver().Diag(diag::err_drv_cc_print_options_failure)

clang/lib/Driver/Driver.cpp

@@ -4124,7 +4124,7 @@ void Driver::BuildJobs(Compilation &C) const {
             << '\n';
         Out.flush();
         std::error_code EC;
-        llvm::raw_fd_ostream OS(CCPrintStatReportFilename.c_str(), EC,
+        llvm::raw_fd_ostream OS(CCPrintStatReportFilename, EC,
                                 llvm::sys::fs::OF_Append |
                                     llvm::sys::fs::OF_Text);
         if (EC)

clang/lib/Driver/ToolChains/AMDGPU.cpp

@@ -754,7 +754,7 @@ AMDGPUToolChain::detectSystemGPUs(const ArgList &Args,
 
   std::string ErrorMessage;
   if (int Result = llvm::sys::ExecuteAndWait(
-          Program.c_str(), {}, {}, Redirects, /* SecondsToWait */ 0,
+          Program, {}, {}, Redirects, /* SecondsToWait */ 0,
           /*MemoryLimit*/ 0, &ErrorMessage)) {
     if (Result > 0) {
       ErrorMessage = "Exited with error code " + std::to_string(Result);

clang/lib/Driver/ToolChains/CommonArgs.cpp

@@ -661,7 +661,7 @@ void tools::addArchSpecificRPath(const ToolChain &TC, const ArgList &Args,
   std::string CandidateRPath = TC.getArchSpecificLibPath();
   if (TC.getVFS().exists(CandidateRPath)) {
     CmdArgs.push_back("-rpath");
-    CmdArgs.push_back(Args.MakeArgString(CandidateRPath.c_str()));
+    CmdArgs.push_back(Args.MakeArgString(CandidateRPath));
   }
 }
 

clang/lib/Driver/ToolChains/NetBSD.cpp

@@ -261,8 +261,7 @@ void netbsd::Linker::ConstructJob(Compilation &C, const JobAction &JA,
   const SanitizerArgs &SanArgs = ToolChain.getSanitizerArgs();
   if (SanArgs.needsSharedRt()) {
     CmdArgs.push_back("-rpath");
-    CmdArgs.push_back(Args.MakeArgString(
-        ToolChain.getCompilerRTPath().c_str()));
+    CmdArgs.push_back(Args.MakeArgString(ToolChain.getCompilerRTPath()));
   }
 
   unsigned Major, Minor, Micro;

clang/lib/Frontend/CompilerInstance.cpp

@@ -2128,8 +2128,7 @@ void CompilerInstance::createModuleFromSource(SourceLocation ImportLoc,
     const FileEntry *ModuleMapFile = Other.getFileManager().getVirtualFile(
         ModuleMapFileName, NullTerminatedSource.size(), 0);
     Other.getSourceManager().overrideFileContents(
-        ModuleMapFile,
-        llvm::MemoryBuffer::getMemBuffer(NullTerminatedSource.c_str()));
+        ModuleMapFile, llvm::MemoryBuffer::getMemBuffer(NullTerminatedSource));
 
     Other.BuiltModules = std::move(BuiltModules);
     Other.DeleteBuiltModules = false;