[GlobalISel] Add a GISelValueTracker printing pass #139687
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@llvm/pr-subscribers-llvm-globalisel @llvm/pr-subscribers-backend-amdgpu Author: David Green (davemgreen) ChangesThis adds a GISelValueTrackingPrinterPass that can print the known bits and sign bit of each def in a function. It is built on the new pass manager and so adds a NPM GISelValueTrackingAnalysis, renaming the older class to GISelValueTrackingAnalysisLegacy. (It could just use GISelValueTracking directly). The first 2 functions from the AArch64GISelMITest are ported over to an mir test to show it working. It also runs successfully on all files in llvm/test/CodeGen/AArch64/GlobalISel/*.mir that are not invalid. It can hopefully be used to test GlobalISel known bits analysis more directly in common cases, without jumping through the hoops that the C++ code requires. Patch is 39.23 KiB, truncated to 20.00 KiB below, full version: https://github.com/llvm/llvm-project/pull/139687.diff 24 Files Affected:
diff --git a/llvm/docs/GlobalISel/KnownBits.rst b/llvm/docs/GlobalISel/KnownBits.rst
index c01faa5f08f0f..3c61a58626e84 100644
--- a/llvm/docs/GlobalISel/KnownBits.rst
+++ b/llvm/docs/GlobalISel/KnownBits.rst
@@ -66,7 +66,7 @@ dependency with ``INITIALIZE_PASS_DEPENDENCY``.
...
INITIALIZE_PASS_BEGIN(...)
- INITIALIZE_PASS_DEPENDENCY(GISelValueTrackingAnalysis)
+ INITIALIZE_PASS_DEPENDENCY(GISelValueTrackingAnalysisLegacy)
INITIALIZE_PASS_END(...)
and require the pass in ``getAnalysisUsage``.
@@ -74,10 +74,10 @@ and require the pass in ``getAnalysisUsage``.
.. code-block:: c++
void MyPass::getAnalysisUsage(AnalysisUsage &AU) const {
- AU.addRequired<GISelValueTrackingAnalysis>();
+ AU.addRequired<GISelValueTrackingAnalysisLegacy>();
// Optional: If your pass preserves known bits analysis (many do) then
// indicate that it's preserved for re-use by another pass here.
- AU.addPreserved<GISelValueTrackingAnalysis>();
+ AU.addPreserved<GISelValueTrackingAnalysisLegacy>();
}
Then it's just a matter of fetching the analysis and using it:
@@ -86,7 +86,7 @@ Then it's just a matter of fetching the analysis and using it:
bool MyPass::runOnMachineFunction(MachineFunction &MF) {
...
- GISelValueTracking &VT = getAnalysis<GISelValueTrackingAnalysis>().get(MF);
+ GISelValueTracking &VT = getAnalysis<GISelValueTrackingAnalysisLegacy>().get(MF);
...
MachineInstr *MI = ...;
KnownBits Known = VT->getKnownBits(MI->getOperand(0).getReg());
diff --git a/llvm/include/llvm/CodeGen/GlobalISel/GISelValueTracking.h b/llvm/include/llvm/CodeGen/GlobalISel/GISelValueTracking.h
index aa99bf321d2b1..d4b4a4e731da7 100644
--- a/llvm/include/llvm/CodeGen/GlobalISel/GISelValueTracking.h
+++ b/llvm/include/llvm/CodeGen/GlobalISel/GISelValueTracking.h
@@ -18,6 +18,7 @@
#include "llvm/CodeGen/GlobalISel/GISelChangeObserver.h"
#include "llvm/CodeGen/MachineFunctionPass.h"
#include "llvm/CodeGen/Register.h"
+#include "llvm/IR/PassManager.h"
#include "llvm/InitializePasses.h"
#include "llvm/Support/KnownBits.h"
@@ -104,19 +105,42 @@ class GISelValueTracking : public GISelChangeObserver {
/// Eventually add other features such as caching/ser/deserializing
/// to MIR etc. Those implementations can derive from GISelValueTracking
/// and override computeKnownBitsImpl.
-class GISelValueTrackingAnalysis : public MachineFunctionPass {
+class GISelValueTrackingAnalysisLegacy : public MachineFunctionPass {
std::unique_ptr<GISelValueTracking> Info;
public:
static char ID;
- GISelValueTrackingAnalysis() : MachineFunctionPass(ID) {
- initializeGISelValueTrackingAnalysisPass(*PassRegistry::getPassRegistry());
+ GISelValueTrackingAnalysisLegacy() : MachineFunctionPass(ID) {
+ initializeGISelValueTrackingAnalysisLegacyPass(
+ *PassRegistry::getPassRegistry());
}
GISelValueTracking &get(MachineFunction &MF);
void getAnalysisUsage(AnalysisUsage &AU) const override;
bool runOnMachineFunction(MachineFunction &MF) override;
void releaseMemory() override { Info.reset(); }
};
+
+class GISelValueTrackingAnalysis
+ : public AnalysisInfoMixin<GISelValueTrackingAnalysis> {
+ friend AnalysisInfoMixin<GISelValueTrackingAnalysis>;
+ static AnalysisKey Key;
+
+public:
+ using Result = GISelValueTracking;
+
+ Result run(MachineFunction &MF, MachineFunctionAnalysisManager &MFAM);
+};
+
+class GISelValueTrackingPrinterPass
+ : public PassInfoMixin<GISelValueTrackingPrinterPass> {
+ raw_ostream &OS;
+
+public:
+ GISelValueTrackingPrinterPass(raw_ostream &OS) : OS(OS) {}
+
+ PreservedAnalyses run(MachineFunction &MF,
+ MachineFunctionAnalysisManager &MFAM);
+};
} // namespace llvm
#endif // LLVM_CODEGEN_GLOBALISEL_GISELVALUETRACKING_H
diff --git a/llvm/include/llvm/InitializePasses.h b/llvm/include/llvm/InitializePasses.h
index 0e58caf6478a4..42610d505c2bd 100644
--- a/llvm/include/llvm/InitializePasses.h
+++ b/llvm/include/llvm/InitializePasses.h
@@ -155,7 +155,7 @@ void initializeLazyValueInfoWrapperPassPass(PassRegistry &);
void initializeLegacyLICMPassPass(PassRegistry &);
void initializeLegalizerPass(PassRegistry &);
void initializeGISelCSEAnalysisWrapperPassPass(PassRegistry &);
-void initializeGISelValueTrackingAnalysisPass(PassRegistry &);
+void initializeGISelValueTrackingAnalysisLegacyPass(PassRegistry &);
void initializeLiveDebugValuesLegacyPass(PassRegistry &);
void initializeLiveDebugVariablesWrapperLegacyPass(PassRegistry &);
void initializeLiveIntervalsWrapperPassPass(PassRegistry &);
diff --git a/llvm/include/llvm/Passes/MachinePassRegistry.def b/llvm/include/llvm/Passes/MachinePassRegistry.def
index c69573ee3ed97..518dc55acb99b 100644
--- a/llvm/include/llvm/Passes/MachinePassRegistry.def
+++ b/llvm/include/llvm/Passes/MachinePassRegistry.def
@@ -98,6 +98,7 @@ LOOP_PASS("loop-term-fold", LoopTermFoldPass())
// computed. (We still either need to regenerate kill flags after regalloc, or
// preferably fix the scavenger to not depend on them).
MACHINE_FUNCTION_ANALYSIS("edge-bundles", EdgeBundlesAnalysis())
+MACHINE_FUNCTION_ANALYSIS("gisel-value-tracking", GISelValueTrackingAnalysis())
MACHINE_FUNCTION_ANALYSIS("livedebugvars", LiveDebugVariablesAnalysis())
MACHINE_FUNCTION_ANALYSIS("live-intervals", LiveIntervalsAnalysis())
MACHINE_FUNCTION_ANALYSIS("live-reg-matrix", LiveRegMatrixAnalysis())
@@ -165,6 +166,7 @@ MACHINE_FUNCTION_PASS("post-RA-sched", PostRASchedulerPass(TM))
MACHINE_FUNCTION_PASS("postmisched", PostMachineSchedulerPass(TM))
MACHINE_FUNCTION_PASS("post-ra-pseudos", ExpandPostRAPseudosPass())
MACHINE_FUNCTION_PASS("print", PrintMIRPass())
+MACHINE_FUNCTION_PASS("print<gisel-value-tracking>", GISelValueTrackingPrinterPass(errs()))
MACHINE_FUNCTION_PASS("print<livedebugvars>", LiveDebugVariablesPrinterPass(errs()))
MACHINE_FUNCTION_PASS("print<live-intervals>", LiveIntervalsPrinterPass(errs()))
MACHINE_FUNCTION_PASS("print<live-stacks>", LiveStacksPrinterPass(errs()))
diff --git a/llvm/lib/CodeGen/GlobalISel/GISelValueTracking.cpp b/llvm/lib/CodeGen/GlobalISel/GISelValueTracking.cpp
index 12fe28b29e5c8..40e1b2f95ac47 100644
--- a/llvm/lib/CodeGen/GlobalISel/GISelValueTracking.cpp
+++ b/llvm/lib/CodeGen/GlobalISel/GISelValueTracking.cpp
@@ -27,9 +27,9 @@
using namespace llvm;
-char llvm::GISelValueTrackingAnalysis::ID = 0;
+char llvm::GISelValueTrackingAnalysisLegacy::ID = 0;
-INITIALIZE_PASS(GISelValueTrackingAnalysis, DEBUG_TYPE,
+INITIALIZE_PASS(GISelValueTrackingAnalysisLegacy, DEBUG_TYPE,
"Analysis for ComputingKnownBits", false, true)
GISelValueTracking::GISelValueTracking(MachineFunction &MF, unsigned MaxDepth)
@@ -875,16 +875,18 @@ unsigned GISelValueTracking::computeNumSignBits(Register R, unsigned Depth) {
return computeNumSignBits(R, DemandedElts, Depth);
}
-void GISelValueTrackingAnalysis::getAnalysisUsage(AnalysisUsage &AU) const {
+void GISelValueTrackingAnalysisLegacy::getAnalysisUsage(
+ AnalysisUsage &AU) const {
AU.setPreservesAll();
MachineFunctionPass::getAnalysisUsage(AU);
}
-bool GISelValueTrackingAnalysis::runOnMachineFunction(MachineFunction &MF) {
+bool GISelValueTrackingAnalysisLegacy::runOnMachineFunction(
+ MachineFunction &MF) {
return false;
}
-GISelValueTracking &GISelValueTrackingAnalysis::get(MachineFunction &MF) {
+GISelValueTracking &GISelValueTrackingAnalysisLegacy::get(MachineFunction &MF) {
if (!Info) {
unsigned MaxDepth =
MF.getTarget().getOptLevel() == CodeGenOptLevel::None ? 2 : 6;
@@ -892,3 +894,31 @@ GISelValueTracking &GISelValueTrackingAnalysis::get(MachineFunction &MF) {
}
return *Info;
}
+
+AnalysisKey GISelValueTrackingAnalysis::Key;
+
+GISelValueTracking
+GISelValueTrackingAnalysis::run(MachineFunction &MF,
+ MachineFunctionAnalysisManager &MFAM) {
+ return Result(MF);
+}
+
+PreservedAnalyses
+GISelValueTrackingPrinterPass::run(MachineFunction &MF,
+ MachineFunctionAnalysisManager &MFAM) {
+ auto &VTA = MFAM.getResult<GISelValueTrackingAnalysis>(MF);
+ OS << "name: " << MF.getName() << "\n";
+ for (MachineBasicBlock &BB : MF) {
+ for (MachineInstr &MI : BB) {
+ for (MachineOperand &MO : MI.defs()) {
+ if (!MO.isReg() || MO.getReg().isPhysical())
+ continue;
+ KnownBits Known = VTA.getKnownBits(MO.getReg());
+ unsigned SignedBits = VTA.computeNumSignBits(MO.getReg());
+ OS << "KnownBits:" << Known << " SignBits:" << SignedBits << " for "
+ << MO << "\n";
+ };
+ }
+ }
+ return PreservedAnalyses::all();
+}
diff --git a/llvm/lib/CodeGen/GlobalISel/InstructionSelect.cpp b/llvm/lib/CodeGen/GlobalISel/InstructionSelect.cpp
index 5842f204febf2..194cbc5b2ac87 100644
--- a/llvm/lib/CodeGen/GlobalISel/InstructionSelect.cpp
+++ b/llvm/lib/CodeGen/GlobalISel/InstructionSelect.cpp
@@ -56,7 +56,7 @@ INITIALIZE_PASS_BEGIN(InstructionSelect, DEBUG_TYPE,
"Select target instructions out of generic instructions",
false, false)
INITIALIZE_PASS_DEPENDENCY(TargetPassConfig)
-INITIALIZE_PASS_DEPENDENCY(GISelValueTrackingAnalysis)
+INITIALIZE_PASS_DEPENDENCY(GISelValueTrackingAnalysisLegacy)
INITIALIZE_PASS_DEPENDENCY(ProfileSummaryInfoWrapperPass)
INITIALIZE_PASS_DEPENDENCY(LazyBlockFrequencyInfoPass)
INITIALIZE_PASS_END(InstructionSelect, DEBUG_TYPE,
@@ -120,8 +120,8 @@ class InstructionSelect::MIIteratorMaintainer : public GISelChangeObserver {
void InstructionSelect::getAnalysisUsage(AnalysisUsage &AU) const {
AU.addRequired<TargetPassConfig>();
- AU.addRequired<GISelValueTrackingAnalysis>();
- AU.addPreserved<GISelValueTrackingAnalysis>();
+ AU.addRequired<GISelValueTrackingAnalysisLegacy>();
+ AU.addPreserved<GISelValueTrackingAnalysisLegacy>();
if (OptLevel != CodeGenOptLevel::None) {
AU.addRequired<ProfileSummaryInfoWrapperPass>();
@@ -146,7 +146,7 @@ bool InstructionSelect::runOnMachineFunction(MachineFunction &MF) {
OptLevel = MF.getFunction().hasOptNone() ? CodeGenOptLevel::None
: MF.getTarget().getOptLevel();
- VT = &getAnalysis<GISelValueTrackingAnalysis>().get(MF);
+ VT = &getAnalysis<GISelValueTrackingAnalysisLegacy>().get(MF);
if (OptLevel != CodeGenOptLevel::None) {
PSI = &getAnalysis<ProfileSummaryInfoWrapperPass>().getPSI();
if (PSI && PSI->hasProfileSummary())
diff --git a/llvm/lib/CodeGen/GlobalISel/Legalizer.cpp b/llvm/lib/CodeGen/GlobalISel/Legalizer.cpp
index e4bce16f230b8..1bb3f4bcc9b1b 100644
--- a/llvm/lib/CodeGen/GlobalISel/Legalizer.cpp
+++ b/llvm/lib/CodeGen/GlobalISel/Legalizer.cpp
@@ -75,7 +75,7 @@ INITIALIZE_PASS_BEGIN(Legalizer, DEBUG_TYPE,
false)
INITIALIZE_PASS_DEPENDENCY(TargetPassConfig)
INITIALIZE_PASS_DEPENDENCY(GISelCSEAnalysisWrapperPass)
-INITIALIZE_PASS_DEPENDENCY(GISelValueTrackingAnalysis)
+INITIALIZE_PASS_DEPENDENCY(GISelValueTrackingAnalysisLegacy)
INITIALIZE_PASS_END(Legalizer, DEBUG_TYPE,
"Legalize the Machine IR a function's Machine IR", false,
false)
@@ -86,8 +86,8 @@ void Legalizer::getAnalysisUsage(AnalysisUsage &AU) const {
AU.addRequired<TargetPassConfig>();
AU.addRequired<GISelCSEAnalysisWrapperPass>();
AU.addPreserved<GISelCSEAnalysisWrapperPass>();
- AU.addRequired<GISelValueTrackingAnalysis>();
- AU.addPreserved<GISelValueTrackingAnalysis>();
+ AU.addRequired<GISelValueTrackingAnalysisLegacy>();
+ AU.addPreserved<GISelValueTrackingAnalysisLegacy>();
getSelectionDAGFallbackAnalysisUsage(AU);
MachineFunctionPass::getAnalysisUsage(AU);
}
@@ -341,7 +341,8 @@ bool Legalizer::runOnMachineFunction(MachineFunction &MF) {
AuxObservers.push_back(&LocObserver);
// This allows Known Bits Analysis in the legalizer.
- GISelValueTracking *VT = &getAnalysis<GISelValueTrackingAnalysis>().get(MF);
+ GISelValueTracking *VT =
+ &getAnalysis<GISelValueTrackingAnalysisLegacy>().get(MF);
const LegalizerInfo &LI = *MF.getSubtarget().getLegalizerInfo();
MFResult Result = legalizeMachineFunction(MF, LI, AuxObservers, LocObserver,
diff --git a/llvm/lib/Passes/CMakeLists.txt b/llvm/lib/Passes/CMakeLists.txt
index 6425f4934b210..91c8c4f67074d 100644
--- a/llvm/lib/Passes/CMakeLists.txt
+++ b/llvm/lib/Passes/CMakeLists.txt
@@ -19,6 +19,7 @@ add_llvm_component_library(LLVMPasses
Analysis
CFGuard
CodeGen
+ GlobalISel
Core
Coroutines
HipStdPar
diff --git a/llvm/lib/Passes/PassBuilder.cpp b/llvm/lib/Passes/PassBuilder.cpp
index 7740f622ede7c..8e69683c1d4ce 100644
--- a/llvm/lib/Passes/PassBuilder.cpp
+++ b/llvm/lib/Passes/PassBuilder.cpp
@@ -99,6 +99,7 @@
#include "llvm/CodeGen/FinalizeISel.h"
#include "llvm/CodeGen/FixupStatepointCallerSaved.h"
#include "llvm/CodeGen/GCMetadata.h"
+#include "llvm/CodeGen/GlobalISel/GISelValueTracking.h"
#include "llvm/CodeGen/GlobalMerge.h"
#include "llvm/CodeGen/GlobalMergeFunctions.h"
#include "llvm/CodeGen/HardwareLoops.h"
diff --git a/llvm/lib/Target/AArch64/GISel/AArch64O0PreLegalizerCombiner.cpp b/llvm/lib/Target/AArch64/GISel/AArch64O0PreLegalizerCombiner.cpp
index 460902c67fe35..cca0adc84f6f6 100644
--- a/llvm/lib/Target/AArch64/GISel/AArch64O0PreLegalizerCombiner.cpp
+++ b/llvm/lib/Target/AArch64/GISel/AArch64O0PreLegalizerCombiner.cpp
@@ -135,8 +135,8 @@ void AArch64O0PreLegalizerCombiner::getAnalysisUsage(AnalysisUsage &AU) const {
AU.addRequired<TargetPassConfig>();
AU.setPreservesCFG();
getSelectionDAGFallbackAnalysisUsage(AU);
- AU.addRequired<GISelValueTrackingAnalysis>();
- AU.addPreserved<GISelValueTrackingAnalysis>();
+ AU.addRequired<GISelValueTrackingAnalysisLegacy>();
+ AU.addPreserved<GISelValueTrackingAnalysisLegacy>();
MachineFunctionPass::getAnalysisUsage(AU);
}
@@ -153,7 +153,8 @@ bool AArch64O0PreLegalizerCombiner::runOnMachineFunction(MachineFunction &MF) {
auto &TPC = getAnalysis<TargetPassConfig>();
const Function &F = MF.getFunction();
- GISelValueTracking *VT = &getAnalysis<GISelValueTrackingAnalysis>().get(MF);
+ GISelValueTracking *VT =
+ &getAnalysis<GISelValueTrackingAnalysisLegacy>().get(MF);
const AArch64Subtarget &ST = MF.getSubtarget<AArch64Subtarget>();
@@ -174,7 +175,7 @@ INITIALIZE_PASS_BEGIN(AArch64O0PreLegalizerCombiner, DEBUG_TYPE,
"Combine AArch64 machine instrs before legalization",
false, false)
INITIALIZE_PASS_DEPENDENCY(TargetPassConfig)
-INITIALIZE_PASS_DEPENDENCY(GISelValueTrackingAnalysis)
+INITIALIZE_PASS_DEPENDENCY(GISelValueTrackingAnalysisLegacy)
INITIALIZE_PASS_DEPENDENCY(GISelCSEAnalysisWrapperPass)
INITIALIZE_PASS_END(AArch64O0PreLegalizerCombiner, DEBUG_TYPE,
"Combine AArch64 machine instrs before legalization", false,
diff --git a/llvm/lib/Target/AArch64/GISel/AArch64PostLegalizerCombiner.cpp b/llvm/lib/Target/AArch64/GISel/AArch64PostLegalizerCombiner.cpp
index 32c33990ad348..1c3d2b4166309 100644
--- a/llvm/lib/Target/AArch64/GISel/AArch64PostLegalizerCombiner.cpp
+++ b/llvm/lib/Target/AArch64/GISel/AArch64PostLegalizerCombiner.cpp
@@ -636,8 +636,8 @@ void AArch64PostLegalizerCombiner::getAnalysisUsage(AnalysisUsage &AU) const {
AU.addRequired<TargetPassConfig>();
AU.setPreservesCFG();
getSelectionDAGFallbackAnalysisUsage(AU);
- AU.addRequired<GISelValueTrackingAnalysis>();
- AU.addPreserved<GISelValueTrackingAnalysis>();
+ AU.addRequired<GISelValueTrackingAnalysisLegacy>();
+ AU.addPreserved<GISelValueTrackingAnalysisLegacy>();
if (!IsOptNone) {
AU.addRequired<MachineDominatorTreeWrapperPass>();
AU.addPreserved<MachineDominatorTreeWrapperPass>();
@@ -668,7 +668,8 @@ bool AArch64PostLegalizerCombiner::runOnMachineFunction(MachineFunction &MF) {
const AArch64Subtarget &ST = MF.getSubtarget<AArch64Subtarget>();
const auto *LI = ST.getLegalizerInfo();
- GISelValueTracking *VT = &getAnalysis<GISelValueTrackingAnalysis>().get(MF);
+ GISelValueTracking *VT =
+ &getAnalysis<GISelValueTrackingAnalysisLegacy>().get(MF);
MachineDominatorTree *MDT =
IsOptNone ? nullptr
: &getAnalysis<MachineDominatorTreeWrapperPass>().getDomTree();
@@ -883,7 +884,7 @@ INITIALIZE_PASS_BEGIN(AArch64PostLegalizerCombiner, DEBUG_TYPE,
"Combine AArch64 MachineInstrs after legalization", false,
false)
INITIALIZE_PASS_DEPENDENCY(TargetPassConfig)
-INITIALIZE_PASS_DEPENDENCY(GISelValueTrackingAnalysis)
+INITIALIZE_PASS_DEPENDENCY(GISelValueTrackingAnalysisLegacy)
INITIALIZE_PASS_END(AArch64PostLegalizerCombiner, DEBUG_TYPE,
"Combine AArch64 MachineInstrs after legalization", false,
false)
diff --git a/llvm/lib/Target/AArch64/GISel/AArch64PreLegalizerCombiner.cpp b/llvm/lib/Target/AArch64/GISel/AArch64PreLegalizerCombiner.cpp
index 416386555dc0e..37a7d2206b180 100644
--- a/llvm/lib/Target/AArch64/GISel/AArch64PreLegalizerCombiner.cpp
+++ b/llvm/lib/Target/AArch64/GISel/AArch64PreLegalizerCombiner.cpp
@@ -820,8 +820,8 @@ void AArch64PreLegalizerCombiner::getAnalysisUsage(AnalysisUsage &AU) const {
AU.addRequired<TargetPassConfig>();
AU.setPreservesCFG();
getSelectionDAGFallbackAnalysisUsage(AU);
- AU.addRequired<GISelValueTrackingAnalysis>();
- AU.addPreserved<GISelValueTrackingAnalysis>();
+ AU.addRequired<GISelValueTrackingAnalysisLegacy>();
+ AU.addPreserved<GISelValueTrackingAnalysisLegacy>();
AU.addRequired<MachineDominatorTreeWrapperPass>();
AU.addPreserved<MachineDominatorTreeWrapperPass>();
AU.addRequired<GISelCSEAnalysisWrapperPass>();
@@ -852,7 +852,8 @@ bool AArch64PreLegalizerCombiner::runOnMachineFunction(MachineFunction &MF) {
const Function &F = MF.getFunction();
bool EnableOpt =
MF.getTarget().getOptLevel() != CodeGenOptLevel::None && !skipFunction(F);
- GISelValueTracking *VT = &getAnalysis<GISelValueTrackingAnalysis>().get(MF);
+ GISelValueTracking *VT =
+ &getAnalysis<GISelValueTrackingAnalysisLegacy>().get(MF);
MachineDominatorTree *MDT =
&getAnalysis<MachineDominatorTreeWrapperPass>().getDomTree();
CombinerInfo CInfo(/*AllowIllegalOps*/ true, /*ShouldLegalizeIllegal*/ false,
@@ -874,7 +875,7 @@ INITIALIZE_PASS_BEGIN(AArch64PreLegalizerCombiner, DEBUG_TYPE,
"Combine AArch64 machine instrs before legalization",
false, false)
INITIALIZE_PASS_DEPENDENCY(TargetPassConfig)
-INITIALIZE_PASS_DEPENDENCY(GISelValueTrackingAnalysis)
+INITIALIZE_PASS_DEPENDENCY(GISelValueTrackingAnalysisLegacy)
INITIALIZE_PASS_DEPENDENCY(GISelCSEAnalysisWrapperPass)
INITIALIZE_PASS_END(AArch64PreLegalizerCombiner, DEBUG_TYPE,
"Combine AArch64 machine instrs before legalization", false,
diff --git a/llvm/lib/Target/AMDGPU/AMDGPUPostLegalizerCombiner.cpp b/llvm/lib/Target/AMDGPU/AMDGPUPostLegalizerCombiner.cpp
index a52a6aef2bc39..0c6122cce78e0 100644
--- a/llvm/lib/Target/AMDGPU/AMDGPUPostLegalizerCombiner.cpp
+++ b/llvm/lib/Target/AMDGPU/AMDGPUPostLegalizerCombiner.cpp
@@ -462,8 +462,8 @@ void AMDGPUPostLegalizerCombiner::getAnalysisUsage(AnalysisUsage &AU) const {
AU.addRequired<TargetPassConfig>();
AU.setPreservesCFG();
getSelectionDAGFallbackAnalysisUsage(AU);
- AU.addRequired<GISelValueTrackingAnalysis>();
- AU.addPreserved<GISelValueTrackingAnalysis>();
+ AU.addRequired<GISelValueTrackingAnalysisLegacy>();
+ AU.addPreserved<GISelValueTrackingAnalysisLegacy>();
if (!IsOptNone) {
AU.addRequired<MachineDominatorTreeWrapperPass>();
AU.addPreserved<MachineDominatorTreeWrapperPass>();
@@ -490,7 +490,8 @@ bool AMDGPUPostLegalizerCombiner::runOnMachineFunction(MachineFunction &MF) {
const AMDGPULegalizerInfo *LI =
static_cast<const AMDGPULegalizerInfo *>(ST.getLegalizerInfo());
- GISelValueTracking *VT = &getAnalysis<GISelValueTrackingAnalysis>().get(MF);
+ GISelValueTracking *VT =
+ &getAnalysis<GISelValueTrackingAnalysisLegacy>().get(MF);
MachineDominatorTree *MDT =
IsOptNone ? nullptr
: &getAnalysis<MachineDominatorTreeWrapperPass>().getDomTree();
@@ -512,7 +513,7 @@ INITIALIZE_PASS_BEGIN(AMDGPUPostLegalizerCombiner, DEBUG_TYPE,
"Combine AMDGPU machine instrs after legalization", false,
false)
INITIALIZE_PASS_DEPENDENCY(TargetPassConfig)
-INITIALIZE_PASS_DEPE...
[truncated]
|
|
@llvm/pr-subscribers-backend-spir-v Author: David Green (davemgreen) ChangesThis adds a GISelValueTrackingPrinterPass that can print the known bits and sign bit of each def in a function. It is built on the new pass manager and so adds a NPM GISelValueTrackingAnalysis, renaming the older class to GISelValueTrackingAnalysisLegacy. (It could just use GISelValueTracking directly). The first 2 functions from the AArch64GISelMITest are ported over to an mir test to show it working. It also runs successfully on all files in llvm/test/CodeGen/AArch64/GlobalISel/*.mir that are not invalid. It can hopefully be used to test GlobalISel known bits analysis more directly in common cases, without jumping through the hoops that the C++ code requires. Full diff: https://github.com/llvm/llvm-project/pull/139687.diff 24 Files Affected:
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arsenm
reviewed
May 13, 2025
| if (!MO.isReg() || MO.getReg().isPhysical()) | ||
| continue; | ||
| KnownBits Known = VTA.getKnownBits(MO.getReg()); | ||
| unsigned SignedBits = VTA.computeNumSignBits(MO.getReg()); |
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Missing a print of the instruction / register?
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I'm not sure I understood what you meant in this one - the others I have update.
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The trailing " for " << MO threw me off, I'd expect the value being printed to be the first thing in the message not the last
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It was modelled after the CostModel printing (for example llvm/test/Analysis/CostModel/AArch64/shuffle-other.ll), where it prints the instruction at the end of the line. The instructions can be variable length and quite long.
For these it just prints the register name, as the instruction might have multiple outputs. The full instruction is already in the test. As it's short and not (very) variable length moving it to the front sounds OK to me, the KnownBits can be quite variable in length themselves.
tgymnich
approved these changes
May 13, 2025
This adds a GISelValueTrackingPrinterPass that can print the known bits and sign bit of each def in a function. It is built on the new pass manager and so adds a NPM GISelValueTrackingAnalysis, renaming the older class to GISelValueTrackingAnalysisLegacy. (It could just use GISelValueTracking directly). The first 2 functions from the AArch64GISelMITest are ported over to an mit test to show it working. It also runs successfully on all files in llvm/test/CodeGen/AArch64/GlobalISel/*.mir that are not invalid.
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This adds a GISelValueTrackingPrinterPass that can print the known bits and sign bit of each def in a function. It is built on the new pass manager and so adds a NPM GISelValueTrackingAnalysis, renaming the older class to GISelValueTrackingAnalysisLegacy. (It could just use GISelValueTracking directly).
The first 2 functions from the AArch64GISelMITest are ported over to an mir test to show it working. It also runs successfully on all files in llvm/test/CodeGen/AArch64/GlobalISel/*.mir that are not invalid. It can hopefully be used to test GlobalISel known bits analysis more directly in common cases, without jumping through the hoops that the C++ code requires.