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Pass -backend-option to LLVM when there is no target machine. 

Clang should pass -backend-option to LLVM even though there is no target machine, since LLVM passes are used when emitting LLVM IR.

Differential Revision: http://reviews.llvm.org/D17552

llvm-svn: 266117
This commit is contained in:
Yaxun Liu 2016-04-12 20:22:32 +00:00
parent 6893570853
commit b5e80c3117
2 changed files with 27 additions and 16 deletions
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39
clang/lib/CodeGen/BackendUtil.cpp
View File

@ -98,6 +98,9 @@ private:
return PerFunctionPasses;
}
/// Set LLVM command line options passed through -backend-option.
void setCommandLineOpts();
void CreatePasses(ModuleSummaryIndex *ModuleSummary);
/// Generates the TargetMachine.
@ -453,6 +456,24 @@ void EmitAssemblyHelper::CreatePasses(ModuleSummaryIndex *ModuleSummary) {
PMBuilder.populateModulePassManager(*MPM);
}
void EmitAssemblyHelper::setCommandLineOpts() {
SmallVector<const char *, 16> BackendArgs;
BackendArgs.push_back("clang"); // Fake program name.
if (!CodeGenOpts.DebugPass.empty()) {
BackendArgs.push_back("-debug-pass");
BackendArgs.push_back(CodeGenOpts.DebugPass.c_str());
}
if (!CodeGenOpts.LimitFloatPrecision.empty()) {
BackendArgs.push_back("-limit-float-precision");
BackendArgs.push_back(CodeGenOpts.LimitFloatPrecision.c_str());
}
for (const std::string &BackendOption : CodeGenOpts.BackendOptions)
BackendArgs.push_back(BackendOption.c_str());
BackendArgs.push_back(nullptr);
llvm::cl::ParseCommandLineOptions(BackendArgs.size() - 1,
BackendArgs.data());
}
TargetMachine *EmitAssemblyHelper::CreateTargetMachine(bool MustCreateTM) {
// Create the TargetMachine for generating code.
std::string Error;
@ -475,22 +496,6 @@ TargetMachine *EmitAssemblyHelper::CreateTargetMachine(bool MustCreateTM) {
assert(CodeModel != ~0u && "invalid code model!");
llvm::CodeModel::Model CM = static_cast<llvm::CodeModel::Model>(CodeModel);
SmallVector<const char *, 16> BackendArgs;
BackendArgs.push_back("clang"); // Fake program name.
if (!CodeGenOpts.DebugPass.empty()) {
BackendArgs.push_back("-debug-pass");
BackendArgs.push_back(CodeGenOpts.DebugPass.c_str());
}
if (!CodeGenOpts.LimitFloatPrecision.empty()) {
BackendArgs.push_back("-limit-float-precision");
BackendArgs.push_back(CodeGenOpts.LimitFloatPrecision.c_str());
}
for (const std::string &BackendOption : CodeGenOpts.BackendOptions)
BackendArgs.push_back(BackendOption.c_str());
BackendArgs.push_back(nullptr);
llvm::cl::ParseCommandLineOptions(BackendArgs.size() - 1,
BackendArgs.data());
std::string FeaturesStr =
llvm::join(TargetOpts.Features.begin(), TargetOpts.Features.end(), ",");
@ -629,6 +634,8 @@ void EmitAssemblyHelper::EmitAssembly(BackendAction Action,
raw_pwrite_stream *OS) {
TimeRegion Region(llvm::TimePassesIsEnabled ? &CodeGenerationTime : nullptr);
setCommandLineOpts();
bool UsesCodeGen = (Action != Backend_EmitNothing &&
Action != Backend_EmitBC &&
Action != Backend_EmitLL);

4
clang/test/Frontend/backend-option.c Normal file
View File

@ -0,0 +1,4 @@
// RUN: %clang_cc1 %s -emit-llvm -backend-option -time-passes -o - 2>&1 | FileCheck %s
// RUN: %clang_cc1 %s -emit-llvm -backend-option -time-passes -o - -triple spir-unknown-unknown 2>&1 | FileCheck %s
// CHECK: Pass execution timing report