[TableGen][GISel] Reuse importNodeRenderer for OperandWithDefaultOps
#121285
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@llvm/pr-subscribers-tablegen @llvm/pr-subscribers-llvm-globalisel Author: Sergei Barannikov (s-barannikov) ChangesThis avoids some code duplication (handling Depends on #121283. Full diff: https://github.com/llvm/llvm-project/pull/121285.diff 2 Files Affected:
diff --git a/llvm/test/TableGen/GlobalISelEmitter/undef-tied-input.td b/llvm/test/TableGen/GlobalISelEmitter/undef-tied-input.td
new file mode 100644
index 00000000000000..a2ee3dc311772c
--- /dev/null
+++ b/llvm/test/TableGen/GlobalISelEmitter/undef-tied-input.td
@@ -0,0 +1,24 @@
+// RUN: llvm-tblgen -gen-global-isel -I %p/../../../include -I %p/../Common %s | FileCheck %s
+
+include "llvm/Target/Target.td"
+include "GlobalISelEmitterCommon.td"
+
+def undef_tied : OperandWithDefaultOps<untyped, (ops (i32 undef_tied_input))> {
+ let MIOperandInfo = (ops GPR32:$inactive);
+}
+
+let Constraints = "$opt.inactive = $rd" in
+def I1 : I<(outs GPR32:$rd), (ins GPR32:$rs, undef_tied:$opt),
+ [(set GPR32:$rd, (abs i32:$rs))]>;
+
+// CHECK-LABEL: // (abs:{ *:[i32] } i32:{ *:[i32] }:$rs) => (I1:{ *:[i32] } i32:{ *:[i32] }:$rs)
+// CHECK-NEXT: GIR_MakeTempReg, /*TempRegID*/0, /*TypeID*/GILLT_s32,
+// CHECK-NEXT: GIR_BuildMI, /*InsnID*/1, /*Opcode*/GIMT_Encode2(TargetOpcode::IMPLICIT_DEF),
+// CHECK-NEXT: GIR_AddTempRegister, /*InsnID*/1, /*TempRegID*/0, /*TempRegFlags*/GIMT_Encode2(RegState::Define),
+// CHECK-NEXT: GIR_BuildRootMI, /*Opcode*/GIMT_Encode2(MyTarget::I1),
+// CHECK-NEXT: GIR_RootToRootCopy, /*OpIdx*/0, // DstI[rd]
+// CHECK-NEXT: GIR_RootToRootCopy, /*OpIdx*/1, // rs
+// CHECK-NEXT: GIR_AddSimpleTempRegister, /*InsnID*/0, /*TempRegID*/0,
+// CHECK-NEXT: GIR_RootConstrainSelectedInstOperands,
+// CHECK-NEXT: // GIR_Coverage, 0,
+// CHECK-NEXT: GIR_EraseRootFromParent_Done,
diff --git a/llvm/utils/TableGen/GlobalISelEmitter.cpp b/llvm/utils/TableGen/GlobalISelEmitter.cpp
index f0fb11625883ea..9f244ca804a08c 100644
--- a/llvm/utils/TableGen/GlobalISelEmitter.cpp
+++ b/llvm/utils/TableGen/GlobalISelEmitter.cpp
@@ -418,7 +418,8 @@ class GlobalISelEmitter final : public GlobalISelMatchTableExecutorEmitter {
const TreePatternNode &N) const;
Error importLeafNodeRenderer(RuleMatcher &M, BuildMIAction &MIBuilder,
- const TreePatternNode &N) const;
+ const TreePatternNode &N,
+ action_iterator InsertPt) const;
Error importXFormNodeRenderer(RuleMatcher &M, BuildMIAction &MIBuilder,
const TreePatternNode &N) const;
@@ -431,9 +432,6 @@ class GlobalISelEmitter final : public GlobalISelMatchTableExecutorEmitter {
const TreePatternNode &N,
action_iterator &InsertPt) const;
- Error importDefaultOperandRenderers(action_iterator InsertPt, RuleMatcher &M,
- BuildMIAction &DstMIBuilder,
- const DAGDefaultOperand &DefaultOp) const;
Error importImplicitDefRenderers(BuildMIAction &DstMIBuilder,
ArrayRef<const Record *> ImplicitDefs) const;
@@ -1291,7 +1289,8 @@ Error GlobalISelEmitter::importNamedNodeRenderer(
// Equivalent of MatcherGen::EmitResultLeafAsOperand.
Error GlobalISelEmitter::importLeafNodeRenderer(
- RuleMatcher &M, BuildMIAction &MIBuilder, const TreePatternNode &N) const {
+ RuleMatcher &M, BuildMIAction &MIBuilder, const TreePatternNode &N,
+ action_iterator InsertPt) const {
if (const auto *II = dyn_cast<IntInit>(N.getLeafValue())) {
MIBuilder.addRenderer<ImmRenderer>(II->getValue());
return Error::success();
@@ -1300,11 +1299,24 @@ Error GlobalISelEmitter::importLeafNodeRenderer(
if (const auto *DI = dyn_cast<DefInit>(N.getLeafValue())) {
const Record *R = DI->getDef();
- if (R->isSubClassOf("Register")) {
+ if (R->isSubClassOf("Register") || R->getName() == "zero_reg") {
MIBuilder.addRenderer<AddRegisterRenderer>(Target, R);
return Error::success();
}
+ if (R->getName() == "undef_tied_input") {
+ std::optional<LLTCodeGen> OpTyOrNone = MVTToLLT(N.getSimpleType(0));
+ unsigned TempRegID = M.allocateTempRegID();
+ M.insertAction<MakeTempRegisterAction>(InsertPt, *OpTyOrNone, TempRegID);
+ auto I = M.insertAction<BuildMIAction>(
+ InsertPt, M.allocateOutputInsnID(),
+ &Target.getInstruction(RK.getDef("IMPLICIT_DEF")));
+ auto &ImpDefBuilder = static_cast<BuildMIAction &>(**I);
+ ImpDefBuilder.addRenderer<TempRegRenderer>(TempRegID, /*IsDef=*/true);
+ MIBuilder.addRenderer<TempRegRenderer>(TempRegID);
+ return Error::success();
+ }
+
if (R->isSubClassOf("SubRegIndex")) {
const CodeGenSubRegIndex *SubRegIndex = CGRegs.getSubRegIdx(R);
MIBuilder.addRenderer<ImmRenderer>(SubRegIndex->EnumValue);
@@ -1386,7 +1398,7 @@ Error GlobalISelEmitter::importNodeRenderer(RuleMatcher &M,
return importNamedNodeRenderer(M, MIBuilder, N);
if (N.isLeaf())
- return importLeafNodeRenderer(M, MIBuilder, N);
+ return importLeafNodeRenderer(M, MIBuilder, N, InsertPt);
if (N.getOperator()->isSubClassOf("SDNodeXForm"))
return importXFormNodeRenderer(M, MIBuilder, N);
@@ -1707,11 +1719,11 @@ Expected<action_iterator> GlobalISelEmitter::importExplicitUseRenderers(
// This is a predicate or optional def operand which the pattern has not
// overridden, or which we aren't letting it override; emit the 'default
// ops' operands.
-
- const Record *OperandNode = DstI->Operands[InstOpNo].Rec;
- if (auto Error = importDefaultOperandRenderers(
- InsertPt, M, DstMIBuilder, CGP.getDefaultOperand(OperandNode)))
- return std::move(Error);
+ for (const TreePatternNode &OpNode :
+ make_pointee_range(CGP.getDefaultOperand(OperandNode).DefaultOps)) {
+ if (Error Err = importNodeRenderer(M, DstMIBuilder, OpNode, InsertPt))
+ return Err;
+ }
++NumDefaultOps;
continue;
@@ -1734,47 +1746,6 @@ Expected<action_iterator> GlobalISelEmitter::importExplicitUseRenderers(
return InsertPt;
}
-Error GlobalISelEmitter::importDefaultOperandRenderers(
- action_iterator InsertPt, RuleMatcher &M, BuildMIAction &DstMIBuilder,
- const DAGDefaultOperand &DefaultOp) const {
- for (const auto &Op : DefaultOp.DefaultOps) {
- const auto &N = *Op;
- if (!N.isLeaf())
- return failedImport("Could not add default op");
-
- const auto *DefaultOp = N.getLeafValue();
-
- if (const DefInit *DefaultDefOp = dyn_cast<DefInit>(DefaultOp)) {
- std::optional<LLTCodeGen> OpTyOrNone = MVTToLLT(N.getSimpleType(0));
- auto *Def = DefaultDefOp->getDef();
- if (Def->getName() == "undef_tied_input") {
- unsigned TempRegID = M.allocateTempRegID();
- M.insertAction<MakeTempRegisterAction>(InsertPt, *OpTyOrNone,
- TempRegID);
- InsertPt = M.insertAction<BuildMIAction>(
- InsertPt, M.allocateOutputInsnID(),
- &Target.getInstruction(RK.getDef("IMPLICIT_DEF")));
- BuildMIAction &IDMIBuilder =
- *static_cast<BuildMIAction *>(InsertPt->get());
- IDMIBuilder.addRenderer<TempRegRenderer>(TempRegID);
- DstMIBuilder.addRenderer<TempRegRenderer>(TempRegID);
- } else {
- DstMIBuilder.addRenderer<AddRegisterRenderer>(Target, Def);
- }
- continue;
- }
-
- if (const IntInit *DefaultIntOp = dyn_cast<IntInit>(DefaultOp)) {
- DstMIBuilder.addRenderer<ImmRenderer>(DefaultIntOp->getValue());
- continue;
- }
-
- return failedImport("Could not add default op");
- }
-
- return Error::success();
-}
-
Error GlobalISelEmitter::importImplicitDefRenderers(
BuildMIAction &DstMIBuilder, ArrayRef<const Record *> ImplicitDefs) const {
if (!ImplicitDefs.empty())
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arsenm
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arsenm
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Dec 29, 2024
This avoids some code duplication (handling `Register`, `zero_reg` and immediate operands).
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LLVM Buildbot has detected a new failure on builder Full details are available at: https://lab.llvm.org/buildbot/#/builders/198/builds/825 Here is the relevant piece of the build log for the reference |
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This avoids some code duplication (handling
Register,zero_regand immediate operands).