Revert "[mlir][spirv] Lower arith overflow flags to corresponding S…

…PIR-V op decorations (llvm#77714)" Temporaryly reverting as it broke python bindings This reverts commit 4278d9b.
justinfargnoli · Jan 28, 2024 · 8b507ae · 8b507ae
1 parent 7ff779c
commit 8b507ae
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diff --git a/mlir/lib/Conversion/ArithToSPIRV/ArithToSPIRV.cpp b/mlir/lib/Conversion/ArithToSPIRV/ArithToSPIRV.cpp
@@ -158,61 +158,8 @@ getTypeConversionFailure(ConversionPatternRewriter &rewriter, Operation *op) {
   return getTypeConversionFailure(rewriter, op, op->getResultTypes().front());
 }
 
-// TODO: Move to some common place?
-static std::string getDecorationString(spirv::Decoration decor) {
-  return llvm::convertToSnakeFromCamelCase(stringifyDecoration(decor));
-}
-
 namespace {
 
-/// Converts elementwise unary, binary and ternary arith operations to SPIR-V
-/// operations. Op can potentially support overflow flags.
-template <typename Op, typename SPIRVOp>
-struct ElementwiseArithOpPattern final : OpConversionPattern<Op> {
-  using OpConversionPattern<Op>::OpConversionPattern;
-
-  LogicalResult
-  matchAndRewrite(Op op, typename Op::Adaptor adaptor,
-                  ConversionPatternRewriter &rewriter) const override {
-    assert(adaptor.getOperands().size() <= 3);
-    auto converter = this->template getTypeConverter<SPIRVTypeConverter>();
-    Type dstType = converter->convertType(op.getType());
-    if (!dstType) {
-      return rewriter.notifyMatchFailure(
-          op->getLoc(),
-          llvm::formatv("failed to convert type {0} for SPIR-V", op.getType()));
-    }
-
-    if (SPIRVOp::template hasTrait<OpTrait::spirv::UnsignedOp>() &&
-        !getElementTypeOrSelf(op.getType()).isIndex() &&
-        dstType != op.getType()) {
-      return op.emitError("bitwidth emulation is not implemented yet on "
-                          "unsigned op pattern version");
-    }
-
-    auto overflowFlags = arith::IntegerOverflowFlags::none;
-    if (auto overflowIface =
-            dyn_cast<arith::ArithIntegerOverflowFlagsInterface>(*op)) {
-      if (converter->getTargetEnv().allows(
-              spirv::Extension::SPV_KHR_no_integer_wrap_decoration))
-        overflowFlags = overflowIface.getOverflowAttr().getValue();
-    }
-
-    auto newOp = rewriter.template replaceOpWithNewOp<SPIRVOp>(
-        op, dstType, adaptor.getOperands());
-
-    if (bitEnumContainsAny(overflowFlags, arith::IntegerOverflowFlags::nsw))
-      newOp->setAttr(getDecorationString(spirv::Decoration::NoSignedWrap),
-                     rewriter.getUnitAttr());
-
-    if (bitEnumContainsAny(overflowFlags, arith::IntegerOverflowFlags::nuw))
-      newOp->setAttr(getDecorationString(spirv::Decoration::NoUnsignedWrap),
-                     rewriter.getUnitAttr());
-
-    return success();
-  }
-};
-
 //===----------------------------------------------------------------------===//
 // ConstantOp
 //===----------------------------------------------------------------------===//
@@ -1207,9 +1154,9 @@ void mlir::arith::populateArithToSPIRVPatterns(
   patterns.add<
     ConstantCompositeOpPattern,
     ConstantScalarOpPattern,
-    ElementwiseArithOpPattern<arith::AddIOp, spirv::IAddOp>,
-    ElementwiseArithOpPattern<arith::SubIOp, spirv::ISubOp>,
-    ElementwiseArithOpPattern<arith::MulIOp, spirv::IMulOp>,
+    spirv::ElementwiseOpPattern<arith::AddIOp, spirv::IAddOp>,
+    spirv::ElementwiseOpPattern<arith::SubIOp, spirv::ISubOp>,
+    spirv::ElementwiseOpPattern<arith::MulIOp, spirv::IMulOp>,
     spirv::ElementwiseOpPattern<arith::DivUIOp, spirv::UDivOp>,
     spirv::ElementwiseOpPattern<arith::DivSIOp, spirv::SDivOp>,
     spirv::ElementwiseOpPattern<arith::RemUIOp, spirv::UModOp>,

diff --git a/mlir/test/Conversion/ArithToSPIRV/arith-to-spirv.mlir b/mlir/test/Conversion/ArithToSPIRV/arith-to-spirv.mlir
@@ -1407,43 +1407,3 @@ func.func @float_scalar(%arg0: f16) {
 }
 
 } // end module
-
-// -----
-
-module attributes {
-  spirv.target_env = #spirv.target_env<#spirv.vce<v1.0, [Int8, Int16, Int64, Float16, Float64, Kernel], [SPV_KHR_no_integer_wrap_decoration]>, #spirv.resource_limits<>>
-} {
-
-// CHECK-LABEL: @ops_flags
-func.func @ops_flags(%arg0: i64, %arg1: i64) {
-  // CHECK: %{{.*}} = spirv.IAdd %{{.*}}, %{{.*}} {no_signed_wrap} : i64
-  %0 = arith.addi %arg0, %arg1 overflow<nsw> : i64
-  // CHECK: %{{.*}} = spirv.ISub %{{.*}}, %{{.*}} {no_unsigned_wrap} : i64
-  %1 = arith.subi %arg0, %arg1 overflow<nuw> : i64
-  // CHECK: %{{.*}} = spirv.IMul %{{.*}}, %{{.*}} {no_signed_wrap, no_unsigned_wrap} : i64
-  %2 = arith.muli %arg0, %arg1 overflow<nsw, nuw> : i64
-  return
-}
-
-} // end module
-
-
-// -----
-
-module attributes {
-  spirv.target_env = #spirv.target_env<#spirv.vce<v1.0, [Int8, Int16, Int64, Float16, Float64], []>, #spirv.resource_limits<>>
-} {
-
-// No decorations should be generated is corresponding Extensions/Capabilities are missing
-// CHECK-LABEL: @ops_flags
-func.func @ops_flags(%arg0: i64, %arg1: i64) {
-  // CHECK: %{{.*}} = spirv.IAdd %{{.*}}, %{{.*}} : i64
-  %0 = arith.addi %arg0, %arg1 overflow<nsw> : i64
-  // CHECK: %{{.*}} = spirv.ISub %{{.*}}, %{{.*}} : i64
-  %1 = arith.subi %arg0, %arg1 overflow<nuw> : i64
-  // CHECK: %{{.*}} = spirv.IMul %{{.*}}, %{{.*}} : i64
-  %2 = arith.muli %arg0, %arg1 overflow<nsw, nuw> : i64
-  return
-}
-
-} // end module