verifier: Speed up `GetMethodIdxOfInvoke()`. am: e19e9db1dd

Original change: https://android-review.googlesource.com/c/platform/art/+/3386503

Change-Id: I9ee07757bd43854fdf9a80eed383aecf5dca39e6
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>

1 files changed, 23 insertions, 2 deletions

diff --git a/runtime/verifier/method_verifier.cc b/runtime/verifier/method_verifier.cc
index 934d73b4d1..2d9f986059 100644
--- a/runtime/verifier/method_verifier.cc
+++ b/runtime/verifier/method_verifier.cc
@@ -1021,9 +1021,30 @@ class MethodVerifier final : public ::art::verifier::MethodVerifier {
   }
 
   // Returns the method index of an invoke instruction.
-  uint16_t GetMethodIdxOfInvoke(const Instruction* inst)
+  static uint16_t GetMethodIdxOfInvoke(const Instruction* inst)
       REQUIRES_SHARED(Locks::mutator_lock_) {
-    return inst->VRegB();
+    // Note: This is compiled to a single load in release mode.
+    Instruction::Code opcode = inst->Opcode();
+    if (opcode == Instruction::INVOKE_VIRTUAL ||
+        opcode == Instruction::INVOKE_SUPER ||
+        opcode == Instruction::INVOKE_DIRECT ||
+        opcode == Instruction::INVOKE_STATIC ||
+        opcode == Instruction::INVOKE_INTERFACE ||
+        opcode == Instruction::INVOKE_CUSTOM) {
+      return inst->VRegB_35c();
+    } else if (opcode == Instruction::INVOKE_VIRTUAL_RANGE ||
+               opcode == Instruction::INVOKE_SUPER_RANGE ||
+               opcode == Instruction::INVOKE_DIRECT_RANGE ||
+               opcode == Instruction::INVOKE_STATIC_RANGE ||
+               opcode == Instruction::INVOKE_INTERFACE_RANGE ||
+               opcode == Instruction::INVOKE_CUSTOM_RANGE) {
+      return inst->VRegB_3rc();
+    } else if (opcode == Instruction::INVOKE_POLYMORPHIC) {
+      return inst->VRegB_45cc();
+    } else {
+      DCHECK_EQ(opcode, Instruction::INVOKE_POLYMORPHIC_RANGE);
+      return inst->VRegB_4rcc();
+    }
   }
   // Returns the field index of a field access instruction.
   uint16_t GetFieldIdxOfFieldAccess(const Instruction* inst, bool is_static)