Introduce InvokeMathCFunction that can be used to directly invoke mathematical function provided by…

runtime/vm/intermediate_language.cc

Index: runtime/vm/intermediate_language.cc
diff --git a/runtime/vm/intermediate_language.cc b/runtime/vm/intermediate_language.cc
index 3f53a21390daf99362ecea04b916ee402c87d963..31902f583e5ad3e996d598f8177e856ae058237f 100644
--- a/runtime/vm/intermediate_language.cc
+++ b/runtime/vm/intermediate_language.cc
@@ -1609,6 +1609,11 @@ RawAbstractType* DoubleToDoubleInstr::CompileType() const {
 }
 
 
+RawAbstractType* InvokeMathCFunctionInstr::CompileType() const {
+  return Type::Double();
+}
+
+
 RawAbstractType* CheckClassInstr::CompileType() const {
   return AbstractType::null();
 }
@@ -2675,6 +2680,61 @@ intptr_t CheckArrayBoundInstr::LengthOffsetFor(intptr_t class_id) {
   }
 }
 
+
+intptr_t InvokeMathCFunctionInstr::ArgumentCountFor(
+    MethodRecognizer::Kind kind) {
+  switch (kind) {
+    case MethodRecognizer::kDoubleTruncate:
+    case MethodRecognizer::kDoubleRound:
+    case MethodRecognizer::kDoubleFloor:
+    case MethodRecognizer::kDoubleCeil: {
+      ASSERT(!CPUFeatures::double_truncate_round_supported());
+      return 1;
+    }
+    case MethodRecognizer::kDoublePow:
+      return 2;
+    default:
+      UNREACHABLE();
+  }
+  return 0;
+}
+
+
+extern const RuntimeEntry kPowRuntimeEntry(
+    "libc_pow", reinterpret_cast<RuntimeFunction>(&pow), 0, true);
+
+extern const RuntimeEntry kFloorRuntimeEntry(
+    "libc_floor", reinterpret_cast<RuntimeFunction>(&floor), 0, true);
+
+extern const RuntimeEntry kCeilRuntimeEntry(
+    "libc_ceil", reinterpret_cast<RuntimeFunction>(&ceil), 0, true);
+
+extern const RuntimeEntry kTruncRuntimeEntry(
+    "libc_trunc", reinterpret_cast<RuntimeFunction>(&trunc), 0, true);
+
+extern const RuntimeEntry kRoundRuntimeEntry(
+    "libc_round", reinterpret_cast<RuntimeFunction>(&round), 0, true);
+
+
+const RuntimeEntry& InvokeMathCFunctionInstr::TargetFunction() const {
+  switch (recognized_kind_) {
+    case MethodRecognizer::kDoubleTruncate:
+      return kTruncRuntimeEntry;
+    case MethodRecognizer::kDoubleRound:
+      return kRoundRuntimeEntry;
+    case MethodRecognizer::kDoubleFloor:
+      return kFloorRuntimeEntry;
+    case MethodRecognizer::kDoubleCeil:
+      return kCeilRuntimeEntry;
+    case MethodRecognizer::kDoublePow:
+      return kPowRuntimeEntry;
+    default:
+      UNREACHABLE();
+  }
+  return kPowRuntimeEntry;
+}
+
+
 #undef __
 
 }  // namespace dart