[lld] r294498 - [COFF] added support for /lldsavetemps
Bob Haarman via llvm-commits
llvm-commits at lists.llvm.org
Wed Feb 8 10:36:41 PST 2017
Author: inglorion
Date: Wed Feb 8 12:36:41 2017
New Revision: 294498
URL: http://llvm.org/viewvc/llvm-project?rev=294498&view=rev
Log:
[COFF] added support for /lldsavetemps
Summary: This adds an option to save temporary files generated during link-time optimization. This can be useful for debugging.
Reviewers: ruiu, pcc
Reviewed By: ruiu, pcc
Subscribers: mehdi_amini
Differential Revision: https://reviews.llvm.org/D29518
Added:
lld/trunk/test/COFF/savetemps.ll
Modified:
lld/trunk/COFF/Config.h
lld/trunk/COFF/Driver.cpp
lld/trunk/COFF/LTO.cpp
lld/trunk/COFF/Options.td
Modified: lld/trunk/COFF/Config.h
URL: http://llvm.org/viewvc/llvm-project/lld/trunk/COFF/Config.h?rev=294498&r1=294497&r2=294498&view=diff
==============================================================================
--- lld/trunk/COFF/Config.h (original)
+++ lld/trunk/COFF/Config.h Wed Feb 8 12:36:41 2017
@@ -105,6 +105,8 @@ struct Configuration {
std::map<std::string, int> DLLOrder;
SymbolBody *DelayLoadHelper = nullptr;
+ bool SaveTemps = false;
+
// Used for SafeSEH.
Symbol *SEHTable = nullptr;
Symbol *SEHCount = nullptr;
Modified: lld/trunk/COFF/Driver.cpp
URL: http://llvm.org/viewvc/llvm-project/lld/trunk/COFF/Driver.cpp?rev=294498&r1=294497&r2=294498&view=diff
==============================================================================
--- lld/trunk/COFF/Driver.cpp (original)
+++ lld/trunk/COFF/Driver.cpp Wed Feb 8 12:36:41 2017
@@ -622,6 +622,10 @@ void LinkerDriver::link(ArrayRef<const c
}
}
+ // Handle /lldsavetemps
+ if (Args.hasArg(OPT_lldsavetemps))
+ Config->SaveTemps = true;
+
// Handle /failifmismatch
for (auto *Arg : Args.filtered(OPT_failifmismatch))
checkFailIfMismatch(Arg->getValue());
Modified: lld/trunk/COFF/LTO.cpp
URL: http://llvm.org/viewvc/llvm-project/lld/trunk/COFF/LTO.cpp?rev=294498&r1=294497&r2=294498&view=diff
==============================================================================
--- lld/trunk/COFF/LTO.cpp (original)
+++ lld/trunk/COFF/LTO.cpp Wed Feb 8 12:36:41 2017
@@ -54,6 +54,14 @@ static void checkError(Error E) {
});
}
+static void saveBuffer(StringRef Buffer, const Twine &Path) {
+ std::error_code EC;
+ raw_fd_ostream OS(Path.str(), EC, sys::fs::OpenFlags::F_None);
+ if (EC)
+ error("cannot create " + Path + ": " + EC.message());
+ OS << Buffer;
+}
+
static std::unique_ptr<lto::LTO> createLTO() {
lto::Config Conf;
Conf.Options = InitTargetOptionsFromCodeGenFlags();
@@ -61,6 +69,9 @@ static std::unique_ptr<lto::LTO> createL
Conf.DisableVerify = true;
Conf.DiagHandler = diagnosticHandler;
Conf.OptLevel = Config->LTOOptLevel;
+ if (Config->SaveTemps)
+ checkError(Conf.addSaveTemps(std::string(Config->OutputFile) + ".",
+ /*UseInputModulePath*/ true));
lto::ThinBackend Backend;
if (Config->LTOJobs != -1u)
Backend = lto::createInProcessThinBackend(Config->LTOJobs);
@@ -116,8 +127,16 @@ std::vector<StringRef> BitcodeCompiler::
}));
std::vector<StringRef> Ret;
- for (unsigned I = 0; I != MaxTasks; ++I)
- if (!Buff[I].empty())
- Ret.emplace_back(Buff[I].data(), Buff[I].size());
+ for (unsigned I = 0; I != MaxTasks; ++I) {
+ if (Buff[I].empty())
+ continue;
+ if (Config->SaveTemps) {
+ if (I == 0)
+ saveBuffer(Buff[I], Config->OutputFile + ".lto.obj");
+ else
+ saveBuffer(Buff[I], Config->OutputFile + Twine(I) + ".lto.obj");
+ }
+ Ret.emplace_back(Buff[I].data(), Buff[I].size());
+ }
return Ret;
}
Modified: lld/trunk/COFF/Options.td
URL: http://llvm.org/viewvc/llvm-project/lld/trunk/COFF/Options.td?rev=294498&r1=294497&r2=294498&view=diff
==============================================================================
--- lld/trunk/COFF/Options.td (original)
+++ lld/trunk/COFF/Options.td Wed Feb 8 12:36:41 2017
@@ -28,6 +28,8 @@ def heap : P<"heap", "Size of the hea
def implib : P<"implib", "Import library name">;
def libpath : P<"libpath", "Additional library search path">;
def linkrepro : P<"linkrepro", "Dump linker invocation and input files for debugging">;
+def lldsavetemps : F<"lldsavetemps">,
+ HelpText<"Save temporary files instead of deleting them">;
def machine : P<"machine", "Specify target platform">;
def merge : P<"merge", "Combine sections">;
def mllvm : P<"mllvm", "Options to pass to LLVM">;
Added: lld/trunk/test/COFF/savetemps.ll
URL: http://llvm.org/viewvc/llvm-project/lld/trunk/test/COFF/savetemps.ll?rev=294498&view=auto
==============================================================================
--- lld/trunk/test/COFF/savetemps.ll (added)
+++ lld/trunk/test/COFF/savetemps.ll Wed Feb 8 12:36:41 2017
@@ -0,0 +1,24 @@
+; RUN: rm -f %T/savetemps.*
+; RUN: llvm-as -o %T/savetemps.obj %s
+; RUN: lld-link /out:%T/savetemps.exe /entry:main /subsystem:console %T/savetemps.obj
+; RUN: not llvm-dis -o - %T/savetemps.exe.0.0.preopt.bc
+; RUN: not llvm-dis -o - %T/savetemps.exe.0.2.internalize.bc
+; RUN: not llvm-dis -o - %T/savetemps.exe.0.4.opt.bc
+; RUN: not llvm-dis -o - %T/savetemps.exe.0.5.precodegen.bc
+; RUN: not llvm-objdump -s %T/savetemps.exe.lto.obj
+; RUN: lld-link /lldsavetemps /out:%T/savetemps.exe /entry:main /subsystem:console %T/savetemps.obj
+; RUN: llvm-dis -o - %T/savetemps.exe.0.0.preopt.bc | FileCheck %s
+; RUN: llvm-dis -o - %T/savetemps.exe.0.2.internalize.bc | FileCheck %s
+; RUN: llvm-dis -o - %T/savetemps.exe.0.4.opt.bc | FileCheck %s
+; RUN: llvm-dis -o - %T/savetemps.exe.0.5.precodegen.bc | FileCheck %s
+; RUN: llvm-objdump -s %T/savetemps.exe.lto.obj | FileCheck --check-prefix=CHECK-OBJDUMP %s
+
+; CHECK: define i32 @main()
+; CHECK-OBJDUMP: file format COFF
+
+target datalayout = "e-m:w-i64:64-f80:128-n8:16:32:64-S128"
+target triple = "x86_64-pc-windows-msvc"
+
+define i32 @main() {
+ ret i32 0
+}
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