diff options
Diffstat (limited to 'vm/compiler/codegen/x86/LowerJump.cpp')
| -rw-r--r-- | vm/compiler/codegen/x86/LowerJump.cpp | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/vm/compiler/codegen/x86/LowerJump.cpp b/vm/compiler/codegen/x86/LowerJump.cpp index 2b10d6bbf..d4b0df3ef 100644 --- a/vm/compiler/codegen/x86/LowerJump.cpp +++ b/vm/compiler/codegen/x86/LowerJump.cpp @@ -1163,6 +1163,13 @@ int op_packed_switch() { //get rPC, %eax has the relative PC offset alu_binary_imm_reg(OpndSize_32, add_opc, (int)rPC, PhysicalReg_EAX, true); scratchRegs[0] = PhysicalReg_SCRATCH_2; +#if defined(WITH_JIT_TUNING) + /* Fall back to interpreter after resolving address of switch target. + * Indicate a kSwitchOverflow. Note: This is not an "overflow". But it helps + * count the times we return from a Switch + */ + move_imm_to_mem(OpndSize_32, kSwitchOverflow, 0, PhysicalReg_ESP, true); +#endif jumpToInterpNoChain(); rPC += 3; return 0; @@ -1220,6 +1227,13 @@ int op_sparse_switch() { //get rPC, %eax has the relative PC offset alu_binary_imm_reg(OpndSize_32, add_opc, (int)rPC, PhysicalReg_EAX, true); scratchRegs[0] = PhysicalReg_SCRATCH_2; +#if defined(WITH_JIT_TUNING) + /* Fall back to interpreter after resolving address of switch target. + * Indicate a kSwitchOverflow. Note: This is not an "overflow". But it helps + * count the times we return from a Switch + */ + move_imm_to_mem(OpndSize_32, kSwitchOverflow, 0, PhysicalReg_ESP, true); +#endif jumpToInterpNoChain(); rPC += 3; return 0; |