yaxunl added inline comments. ================ Comment at: test/Headers/opencl-c-header.cl:53-54 @@ +52,4 @@ +// RUN: %clang_cc1 -triple spir-unknown-unknown -emit-llvm -o - -finclude-default-header -fmodules -fimplicit-module-maps -fmodules-cache-path=%t -fdisable-module-hash -ftime-report %s 2>&1 | FileCheck --check-prefix=CHECK --check-prefix=CHECK-MOD %s +// RUN: chmod u+w %t/opencl_c.pcm +// RUN: mv %t/opencl_c.pcm %t/1_0.pcm + ---------------- I checked the size of the pch file. The largest chunk is for function declarations. Since it contains about 30k declarations, each one is about 50 bytes on average, so total size is about 1.6MB.
The AST of function decl is written by ASTDeclWriter::VisitFunctionDecl http://clang.llvm.org/doxygen/ASTWriterDecl_8cpp_source.html A code snippet is as follows: 515 Record.push_back((int)D->SClass); // FIXME: stable encoding 516 Record.push_back(D->IsInline); 517 Record.push_back(D->IsInlineSpecified); 518 Record.push_back(D->IsVirtualAsWritten); 519 Record.push_back(D->IsPure); 520 Record.push_back(D->HasInheritedPrototype); 521 Record.push_back(D->HasWrittenPrototype); 522 Record.push_back(D->IsDeleted); 523 Record.push_back(D->IsTrivial); 524 Record.push_back(D->IsDefaulted); 525 Record.push_back(D->IsExplicitlyDefaulted); 526 Record.push_back(D->HasImplicitReturnZero); 527 Record.push_back(D->IsConstexpr); 528 Record.push_back(D->HasSkippedBody); 529 Record.push_back(D->IsLateTemplateParsed); 530 Record.push_back(D->getLinkageInternal()); 531 Record.AddSourceLocation(D->getLocEnd()); Record is like a buffer which will be written to file. It uses a vector of int64 to store the values, so it takes space. http://reviews.llvm.org/D20444 _______________________________________________ cfe-commits mailing list cfe-commits@lists.llvm.org http://lists.llvm.org/cgi-bin/mailman/listinfo/cfe-commits
