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Change meaning of optimization levels: -O0 now means 'no optimization' like with

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other compilers.
This commit is contained in:
Frits van Bommel 2009-03-29 15:51:14 +02:00
parent e129494812
commit 257d305032
2 changed files with 9 additions and 14 deletions
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2
gen/linker.cpp
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@ -121,9 +121,9 @@ int linkExecutable(const char* argv0)
{
case 0:
args.push_back("-disable-opt");
args.push_back("-globaldce");
break;
case 1:
args.push_back("-globaldce");
args.push_back("-disable-opt");
args.push_back("-globaldce");
args.push_back("-mem2reg");

21
gen/optimizer.cpp
View file

@ -24,14 +24,14 @@ static cl::opt<char> optimizeLevel(
cl::ZeroOrMore,
cl::values(
clEnumValN(2, "O", "Equivalent to -O2"),
clEnumValN(0, "O0", "Trivial optimizations only"),
clEnumValN(0, "O0", "No optimizations (default)"),
clEnumValN(1, "O1", "Simple optimizations"),
clEnumValN(2, "O2", "Good optimizations"),
clEnumValN(3, "O3", "Aggressive optimizations"),
clEnumValN(4, "O4", "Link-time optimization"), // not implemented?
clEnumValN(5, "O5", "Link-time optimization"), // not implemented?
clEnumValEnd),
cl::init(-1));
cl::init(0));
static cl::opt<bool> enableInlining("enable-inlining",
cl::desc("Enable function inlining (in -O<N>, if given)"),
@ -48,22 +48,17 @@ int optLevel() {
}
bool optimize() {
return (optimizeLevel != -1) || enableInlining || passList.empty();
return optimizeLevel || enableInlining || passList.empty();
}
// this function inserts some or all of the std-compile-opts passes depending on the
// optimization level given.
static void addPassesForOptLevel(PassManager& pm) {
// -O0
if (optimizeLevel >= 0)
{
//pm.add(createStripDeadPrototypesPass());
pm.add(createGlobalDCEPass());
}
// -O1
if (optimizeLevel >= 1)
{
//pm.add(createStripDeadPrototypesPass());
pm.add(createGlobalDCEPass());
pm.add(createRaiseAllocationsPass());
pm.add(createCFGSimplificationPass());
pm.add(createPromoteMemoryToRegisterPass());
@ -129,15 +124,15 @@ static void addPassesForOptLevel(PassManager& pm) {
// Returns true if any optimization passes were invoked.
bool ldc_optimize_module(llvm::Module* m)
{
if (!enableInlining && optimizeLevel == -1 && passList.empty())
if (!enableInlining && optimizeLevel == 0 && passList.empty())
return false;
PassManager pm;
pm.add(new TargetData(m));
bool optimize = (optimizeLevel != -1) || enableInlining;
bool optimize = optimizeLevel != 0 || enableInlining;
unsigned optPos = optimizeLevel != -1
unsigned optPos = optimizeLevel != 0
? optimizeLevel.getPosition()
: enableInlining.getPosition();