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[ThinLTO] Move -lto-use-new-pm to llvm-lto2, and change it to -use-new-pm.

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Summary:
As we teach Clang to use ThinkLTO + new PM, it's good for the users to
inject through Config, instead of setting a flag in the LTOBackend
library. Move the flag to llvm-lto2.

As it moves to llvm-lto2, a new name -use-new-pm seems simpler and as
clear.

Reviewers: davide, tejohnson

Subscribers: mehdi_amini, Prazek, inglorion, eraman, chandlerc, llvm-commits

Differential Revision: https://reviews.llvm.org/D33799

llvm-svn: 304492
This commit is contained in:
Tim Shen 2017-06-01 23:13:44 +00:00
parent d36af06d07
commit c432c72577
6 changed files with 14 additions and 9 deletions
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3
include/llvm/LTO/Config.h
View File

@ -46,6 +46,9 @@ struct Config {
unsigned OptLevel = 2;
bool DisableVerify = false;
/// Use the new pass manager
bool UseNewPM = false;
/// Disable entirely the optimizer, including importing for ThinLTO
bool CodeGenOnly = false;

1
lib/LTO/LTO.cpp
View File

@ -122,6 +122,7 @@ static void computeCacheKey(
AddUnsigned(Conf.CGOptLevel);
AddUnsigned(Conf.CGFileType);
AddUnsigned(Conf.OptLevel);
AddUnsigned(Conf.UseNewPM);
AddString(Conf.OptPipeline);
AddString(Conf.AAPipeline);
AddString(Conf.OverrideTriple);

7
lib/LTO/LTOBackend.cpp
View File

@ -42,11 +42,6 @@
using namespace llvm;
using namespace lto;
static cl::opt<bool>
LTOUseNewPM("lto-use-new-pm",
cl::desc("Run LTO passes using the new pass manager"),
cl::init(false), cl::Hidden);
LLVM_ATTRIBUTE_NORETURN static void reportOpenError(StringRef Path, Twine Msg) {
errs() << "failed to open " << Path << ": " << Msg << '\n';
errs().flush();
@ -266,7 +261,7 @@ bool opt(Config &Conf, TargetMachine *TM, unsigned Task, Module &Mod,
if (!Conf.OptPipeline.empty())
runNewPMCustomPasses(Mod, TM, Conf.OptPipeline, Conf.AAPipeline,
Conf.DisableVerify);
else if (LTOUseNewPM)
else if (Conf.UseNewPM)
runNewPMPasses(Mod, TM, Conf.OptLevel, IsThinLTO);
else
runOldPMPasses(Conf, Mod, TM, IsThinLTO, ExportSummary, ImportSummary);

2
test/ThinLTO/X86/newpm-basic.ll
View File

@ -1,7 +1,7 @@
; RUN: opt -module-summary %s -o %t1.bc
; RUN: llvm-lto2 run %t1.bc -o %t.o \
; RUN: -r=%t1.bc,_tinkywinky,pxl \
; RUN: -lto-use-new-pm
; RUN: -use-new-pm
target datalayout = "e-m:o-i64:64-f80:128-n8:16:32:64-S128"
target triple = "x86_64-apple-macosx10.11.0"

2
test/tools/llvm-lto2/X86/pipeline.ll
View File

@ -8,7 +8,7 @@
; Try the new pass manager LTO default pipeline (make sure the option
; is accepted).
; RUN: llvm-lto2 run %t1.bc -o %t.o -lto-use-new-pm -r %t1.bc,patatino,px
; RUN: llvm-lto2 run %t1.bc -o %t.o -use-new-pm -r %t1.bc,patatino,px
target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"
target triple = "x86_64-unknown-linux-gnu"

8
tools/llvm-lto2/llvm-lto2.cpp
View File

@ -99,6 +99,11 @@ static cl::opt<bool> OptRemarksWithHotness(
cl::desc("Whether to include hotness informations in the remarks.\n"
"Has effect only if -pass-remarks-output is specified."));
static cl::opt<bool>
UseNewPM("use-new-pm",
cl::desc("Run LTO passes using the new pass manager"),
cl::init(false), cl::Hidden);
static void check(Error E, std::string Msg) {
if (!E)
return;
@ -196,6 +201,7 @@ static int run(int argc, char **argv) {
Conf.AAPipeline = AAPipeline;
Conf.OptLevel = OptLevel - '0';
Conf.UseNewPM = UseNewPM;
switch (CGOptLevel) {
case '0':
Conf.CGOptLevel = CodeGenOpt::None;
@ -351,7 +357,7 @@ int main(int argc, char **argv) {
// FIXME: This should use llvm::cl subcommands, but it isn't currently
// possible to pass an argument not associated with a subcommand to a
// subcommand (e.g. -lto-use-new-pm).
// subcommand (e.g. -use-new-pm).
if (argc < 2)
return usage();