[WebAssembly] Fold any/alltrue (setcc x, 0, eq/ne) to [not] any/alltrue x

llvm/lib/Target/WebAssembly/WebAssemblyISelLowering.cpp

@@ -24,6 +24,7 @@
 #include "llvm/CodeGen/MachineJumpTableInfo.h"
 #include "llvm/CodeGen/MachineModuleInfo.h"
 #include "llvm/CodeGen/MachineRegisterInfo.h"
+#include "llvm/CodeGen/SDPatternMatch.h"
 #include "llvm/CodeGen/SelectionDAG.h"
 #include "llvm/CodeGen/SelectionDAGNodes.h"
 #include "llvm/IR/DiagnosticInfo.h"
@@ -3239,6 +3240,59 @@ static SDValue performBitcastCombine(SDNode *N,
   return SDValue();
 }
 
+static SDValue performAnyAllCombine(SDNode *N, SelectionDAG &DAG) {
+  // any_true (setcc <X>, 0, eq) => (not (all_true X))
+  // all_true (setcc <X>, 0, eq) => (not (any_true X))
+  // any_true (setcc <X>, 0, ne) => (any_true X)
+  // all_true (setcc <X>, 0, ne) => (all_true X)
+  assert(N->getOpcode() == ISD::INTRINSIC_WO_CHAIN);
+  using namespace llvm::SDPatternMatch;
+
+  SDValue LHS;
+  if (!sd_match(N->getOperand(1),
+                m_c_SetCC(m_Value(LHS), m_Zero(), m_CondCode())))
+    return SDValue();
+  EVT LT = LHS.getValueType();
+  if (LT.getScalarSizeInBits() > 128 / LT.getVectorNumElements())
+    return SDValue();
+
+  auto CombineSetCC = [&N, &DAG](Intrinsic::WASMIntrinsics InPre,
+                                 ISD::CondCode SetType,
+                                 Intrinsic::WASMIntrinsics InPost) {
+    if (N->getConstantOperandVal(0) != InPre)
+      return SDValue();
+
+    SDValue LHS;
+    if (!sd_match(N->getOperand(1), m_c_SetCC(m_Value(LHS), m_Zero(),
+                                              m_SpecificCondCode(SetType))))
+      return SDValue();
+
+    SDLoc DL(N);
+    SDValue Ret = DAG.getZExtOrTrunc(
+        DAG.getNode(ISD::INTRINSIC_WO_CHAIN, DL, MVT::i32,
+                    {DAG.getConstant(InPost, DL, MVT::i32), LHS}),
+        DL, MVT::i1);
+    if (SetType == ISD::SETEQ)
+      Ret = DAG.getNOT(DL, Ret, MVT::i1);
+    return DAG.getZExtOrTrunc(Ret, DL, N->getValueType(0));
+  };
+
+  if (SDValue AnyTrueEQ = CombineSetCC(Intrinsic::wasm_anytrue, ISD::SETEQ,
+                                       Intrinsic::wasm_alltrue))
+    return AnyTrueEQ;
+  if (SDValue AllTrueEQ = CombineSetCC(Intrinsic::wasm_alltrue, ISD::SETEQ,
+                                       Intrinsic::wasm_anytrue))
+    return AllTrueEQ;
+  if (SDValue AnyTrueNE = CombineSetCC(Intrinsic::wasm_anytrue, ISD::SETNE,
+                                       Intrinsic::wasm_anytrue))
+    return AnyTrueNE;
+  if (SDValue AllTrueNE = CombineSetCC(Intrinsic::wasm_alltrue, ISD::SETNE,
+                                       Intrinsic::wasm_alltrue))
+    return AllTrueNE;
+
+  return SDValue();
+}
+
 template <int MatchRHS, ISD::CondCode MatchCond, bool RequiresNegate,
           Intrinsic::ID Intrin>
 static SDValue TryMatchTrue(SDNode *N, EVT VecVT, SelectionDAG &DAG) {
@@ -3427,8 +3481,11 @@ WebAssemblyTargetLowering::PerformDAGCombine(SDNode *N,
     return performVectorTruncZeroCombine(N, DCI);
   case ISD::TRUNCATE:
     return performTruncateCombine(N, DCI);
-  case ISD::INTRINSIC_WO_CHAIN:
+  case ISD::INTRINSIC_WO_CHAIN: {
+    if (auto AnyAllCombine = performAnyAllCombine(N, DCI.DAG))
+      return AnyAllCombine;
     return performLowerPartialReduction(N, DCI.DAG);
+  }
   case ISD::MUL:
     return performMulCombine(N, DCI.DAG);
   }

llvm/test/CodeGen/WebAssembly/simd-setcc-reductions.ll

@@ -0,0 +1,135 @@
+; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py UTC_ARGS: --version 5
+; RUN: llc < %s -verify-machineinstrs -disable-wasm-fallthrough-return-opt -wasm-disable-explicit-locals -wasm-keep-registers -mattr=+simd128 | FileCheck %s
+
+target triple = "wasm64"
+
+define i32 @all_true_16_i8(<16 x i8> %v) {
+; CHECK-LABEL: all_true_16_i8:
+; CHECK:         .functype all_true_16_i8 (v128) -> (i32)
+; CHECK-NEXT:  # %bb.0:
+; CHECK-NEXT:    i8x16.all_true $push0=, $0
+; CHECK-NEXT:    return $pop0
+  %1 = icmp eq <16 x i8> %v, zeroinitializer
+  %2 = bitcast <16 x i1> %1 to i16
+  %3 = icmp eq i16 %2, 0
+  %conv3 = zext i1 %3 to i32
+  ret i32 %conv3
+}
+
+
+define i32 @all_true_4_i32(<4 x i32> %v) {
+; CHECK-LABEL: all_true_4_i32:
+; CHECK:         .functype all_true_4_i32 (v128) -> (i32)
+; CHECK-NEXT:  # %bb.0:
+; CHECK-NEXT:    i32x4.all_true $push0=, $0
+; CHECK-NEXT:    return $pop0
+  %1 = icmp eq <4 x i32> %v, zeroinitializer
+  %2 = bitcast <4 x i1> %1 to i4
+  %3 = icmp eq i4 %2, 0
+  %conv3 = zext i1 %3 to i32
+  ret i32 %conv3
+}
+
+
+define i32 @all_true_8_i16(<8 x i16> %v) {
+; CHECK-LABEL: all_true_8_i16:
+; CHECK:         .functype all_true_8_i16 (v128) -> (i32)
+; CHECK-NEXT:  # %bb.0:
+; CHECK-NEXT:    i16x8.all_true $push0=, $0
+; CHECK-NEXT:    return $pop0
+  %1 = icmp eq <8 x i16> %v, zeroinitializer
+  %2 = bitcast <8 x i1> %1 to i8
+  %3 = icmp eq i8 %2, 0
+  %conv3 = zext i1 %3 to i32
+  ret i32 %conv3
+}
+
+
+define i32 @all_true_2_i64(<2 x i64> %v) {
+; CHECK-LABEL: all_true_2_i64:
+; CHECK:         .functype all_true_2_i64 (v128) -> (i32)
+; CHECK-NEXT:  # %bb.0:
+; CHECK-NEXT:    i64x2.all_true $push0=, $0
+; CHECK-NEXT:    return $pop0
+  %1 = icmp eq <2 x i64> %v, zeroinitializer
+  %2 = bitcast <2 x i1> %1 to i2
+  %3 = icmp eq i2 %2, 0
+  %conv3 = zext i1 %3 to i32
+  ret i32 %conv3
+}
+
+
+define i32 @all_true_4_i64(<4 x i64> %v) {
+; CHECK-LABEL: all_true_4_i64:
+; CHECK:         .functype all_true_4_i64 (v128, v128) -> (i32)
+; CHECK-NEXT:  # %bb.0:
+; CHECK-NEXT:    v128.const $push9=, 0, 0
+; CHECK-NEXT:    local.tee $push8=, $2=, $pop9
+; CHECK-NEXT:    i64x2.eq $push1=, $0, $pop8
+; CHECK-NEXT:    i64x2.eq $push0=, $1, $2
+; CHECK-NEXT:    i8x16.shuffle $push2=, $pop1, $pop0, 0, 1, 2, 3, 8, 9, 10, 11, 16, 17, 18, 19, 24, 25, 26, 27
+; CHECK-NEXT:    v128.any_true $push3=, $pop2
+; CHECK-NEXT:    i32.const $push4=, -1
+; CHECK-NEXT:    i32.xor $push5=, $pop3, $pop4
+; CHECK-NEXT:    i32.const $push6=, 1
+; CHECK-NEXT:    i32.and $push7=, $pop5, $pop6
+; CHECK-NEXT:    return $pop7
+  %1 = icmp eq <4 x i64> %v, zeroinitializer
+  %2 = bitcast <4 x i1> %1 to i4
+  %3 = icmp eq i4 %2, 0
+  %conv3 = zext i1 %3 to i32
+  ret i32 %conv3
+}
+
+
+; setcc (iN (bitcast (set_cc (vNi1 X), 0, ne)), 0, ne
+;   => any_true (set_cc (X), 0, ne)
+;   => any_true (X)
+define i32 @any_true_1_4_i32(<4 x i32> %v) {
+; CHECK-LABEL: any_true_1_4_i32:
+; CHECK:         .functype any_true_1_4_i32 (v128) -> (i32)
+; CHECK-NEXT:  # %bb.0:
+; CHECK-NEXT:    v128.any_true $push0=, $0
+; CHECK-NEXT:    return $pop0
+  %1 = icmp ne <4 x i32> %v, zeroinitializer
+  %2 = bitcast <4 x i1> %1 to i4
+  %3 = icmp ne i4 %2, 0
+  %conv3 = zext i1 %3 to i32
+  ret i32 %conv3
+}
+
+; setcc (iN (bitcast (set_cc (vNi1 X), 0, eq)), -1, ne
+;   => not all_true (set_cc (X), 0, eq)
+;   => not not any_true (X)
+;   => any_true (X)
+define i32 @any_true_2_4_i32(<4 x i32> %v) {
+; CHECK-LABEL: any_true_2_4_i32:
+; CHECK:         .functype any_true_2_4_i32 (v128) -> (i32)
+; CHECK-NEXT:  # %bb.0:
+; CHECK-NEXT:    v128.any_true $push0=, $0
+; CHECK-NEXT:    return $pop0
+  %1 = icmp eq <4 x i32> %v, zeroinitializer
+  %2 = bitcast <4 x i1> %1 to i4
+  %3 = icmp ne i4 %2, -1
+  %conv3 = zext i1 %3 to i32
+  ret i32 %conv3
+}
+
+
+; setcc (iN (bitcast (set_cc (vNi1 X), 0, ne)), -1, eq
+;   => all_true (set_cc (X), 0, ne)
+;   => all_true (X)
+define i32 @all_true_2_4_i32(<4 x i32> %v) {
+; CHECK-LABEL: all_true_2_4_i32:
+; CHECK:         .functype all_true_2_4_i32 (v128) -> (i32)
+; CHECK-NEXT:  # %bb.0:
+; CHECK-NEXT:    i32x4.all_true $push0=, $0
+; CHECK-NEXT:    return $pop0
+  %1 = icmp ne <4 x i32> %v, zeroinitializer
+  %2 = bitcast <4 x i1> %1 to i4
+  %3 = icmp eq i4 %2, -1
+  %conv3 = zext i1 %3 to i32
+  ret i32 %conv3
+}
+
+

llvm/test/CodeGen/WebAssembly/simd-vecreduce-bool.ll

@@ -1086,9 +1086,9 @@ define i1 @test_cmp_v16i8(<16 x i8> %x) {
 ; CHECK-LABEL: test_cmp_v16i8:
 ; CHECK:         .functype test_cmp_v16i8 (v128) -> (i32)
 ; CHECK-NEXT:  # %bb.0:
-; CHECK-NEXT:    v128.const $push0=, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0
-; CHECK-NEXT:    i8x16.eq $push1=, $0, $pop0
-; CHECK-NEXT:    v128.any_true $push2=, $pop1
+; CHECK-NEXT:    i8x16.all_true $push0=, $0
+; CHECK-NEXT:    i32.const $push1=, 1
+; CHECK-NEXT:    i32.xor $push2=, $pop0, $pop1
 ; CHECK-NEXT:    return $pop2
   %zero = icmp eq <16 x i8> %x, zeroinitializer
   %ret = call i1 @llvm.vector.reduce.or.v16i1(<16 x i1> %zero)