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[StackMaps] Enable patchpoint liveness analysis per default.

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llvm-svn: 211817
This commit is contained in:
Juergen Ributzka 2014-06-26 23:39:52 +00:00
parent f24160ef4c
commit 4e8c3d809f
4 changed files with 14 additions and 16 deletions
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8
include/llvm/CodeGen/StackMapLivenessAnalysis.h
View File

@ -26,10 +26,10 @@ namespace llvm {
/// a function and attaches the register live-out information to a patchpoint
/// intrinsic if present.
///
/// This is an optional pass that has to be explicitly enabled via the
/// -enable-patchpoint-liveness flag. The pass skips functions that don't have
/// any patchpoint intrinsics. The information provided by this pass is optional
/// and not required by the aformentioned intrinsic to function.
/// This pass can be disabled via the -enable-patchpoint-liveness=false flag.
/// The pass skips functions that don't have any patchpoint intrinsics. The
/// information provided by this pass is optional and not required by the
/// aformentioned intrinsic to function.
class StackMapLiveness : public MachineFunctionPass {
MachineFunction *MF;
const TargetRegisterInfo *TRI;

7
lib/CodeGen/Passes.cpp
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@ -30,10 +30,6 @@
using namespace llvm;
namespace llvm {
extern cl::opt<bool> EnablePatchPointLiveness;
}
static cl::opt<bool> DisablePostRA("disable-post-ra", cl::Hidden,
cl::desc("Disable Post Regalloc"));
static cl::opt<bool> DisableBranchFold("disable-branch-fold", cl::Hidden,
@ -565,8 +561,7 @@ void TargetPassConfig::addMachinePasses() {
if (addPreEmitPass())
printAndVerify("After PreEmit passes");
if (EnablePatchPointLiveness)
addPass(&StackMapLivenessID);
addPass(&StackMapLivenessID);
}
/// Add passes that optimize machine instructions in SSA form.

11
lib/CodeGen/StackMapLivenessAnalysis.cpp
View File

@ -29,7 +29,8 @@ using namespace llvm;
namespace llvm {
cl::opt<bool> EnablePatchPointLiveness("enable-patchpoint-liveness",
cl::Hidden, cl::desc("Enable PatchPoint Liveness Analysis Pass"));
cl::Hidden, cl::init(true),
cl::desc("Enable PatchPoint Liveness Analysis Pass"));
}
STATISTIC(NumStackMapFuncVisited, "Number of functions visited");
@ -60,6 +61,9 @@ void StackMapLiveness::getAnalysisUsage(AnalysisUsage &AU) const {
/// Calculate the liveness information for the given machine function.
bool StackMapLiveness::runOnMachineFunction(MachineFunction &_MF) {
if (!EnablePatchPointLiveness)
return false;
DEBUG(dbgs() << "********** COMPUTING STACKMAP LIVENESS: "
<< _MF.getName() << " **********\n");
MF = &_MF;
@ -67,7 +71,7 @@ bool StackMapLiveness::runOnMachineFunction(MachineFunction &_MF) {
++NumStackMapFuncVisited;
// Skip this function if there are no patchpoints to process.
if (!(MF->getFrameInfo()->hasPatchPoint() && EnablePatchPointLiveness)) {
if (!MF->getFrameInfo()->hasPatchPoint()) {
++NumStackMapFuncSkipped;
return false;
}
@ -88,8 +92,7 @@ bool StackMapLiveness::calculateLiveness() {
// set to an instruction if we encounter a patchpoint instruction.
for (MachineBasicBlock::reverse_iterator I = MBBI->rbegin(),
E = MBBI->rend(); I != E; ++I) {
int Opc = I->getOpcode();
if (Opc == TargetOpcode::PATCHPOINT) {
if (I->getOpcode() == TargetOpcode::PATCHPOINT) {
addLiveOutSetToMI(*I);
HasChanged = true;
HasStackMap = true;

4
test/CodeGen/X86/stackmap-liveness.ll
View File

@ -1,5 +1,5 @@
; RUN: llc < %s -mtriple=x86_64-apple-darwin -mcpu=corei7-avx -disable-fp-elim | FileCheck %s
; RUN: llc < %s -mtriple=x86_64-apple-darwin -mcpu=corei7-avx -disable-fp-elim -enable-patchpoint-liveness | FileCheck -check-prefix=PATCH %s
; RUN: llc < %s -mtriple=x86_64-apple-darwin -mcpu=corei7-avx -disable-fp-elim -enable-patchpoint-liveness=false | FileCheck %s
; RUN: llc < %s -mtriple=x86_64-apple-darwin -mcpu=corei7-avx -disable-fp-elim | FileCheck -check-prefix=PATCH %s
;
; Note: Print verbose stackmaps using -debug-only=stackmaps.