From 805b3b56c6eb542298db33e0181f135dc9fed3d9 Mon Sep 17 00:00:00 2001 From: Mark Mendell Date: Fri, 18 Sep 2015 14:10:29 -0400 Subject: X86 jump tables for PackedSwitch Implement X86PackedSwitch using a jump table of offsets to blocks. The X86PackedSwitch version just adds an input to address the constant area. Change-Id: Id2752a1ee79222493040c6fd0e59aee9a544b76a Bug: 21119474 Signed-off-by: Mark Mendell --- compiler/optimizing/nodes_x86.h | 39 +++++++++++++++++++++++++++++++++++++++ 1 file changed, 39 insertions(+) (limited to 'compiler/optimizing/nodes_x86.h') diff --git a/compiler/optimizing/nodes_x86.h b/compiler/optimizing/nodes_x86.h index f7cc872419..556217bf74 100644 --- a/compiler/optimizing/nodes_x86.h +++ b/compiler/optimizing/nodes_x86.h @@ -62,6 +62,45 @@ class HX86LoadFromConstantTable : public HExpression<2> { DISALLOW_COPY_AND_ASSIGN(HX86LoadFromConstantTable); }; +// X86 version of HPackedSwitch that holds a pointer to the base method address. +class HX86PackedSwitch : public HTemplateInstruction<2> { + public: + HX86PackedSwitch(int32_t start_value, + int32_t num_entries, + HInstruction* input, + HX86ComputeBaseMethodAddress* method_base, + uint32_t dex_pc) + : HTemplateInstruction(SideEffects::None(), dex_pc), + start_value_(start_value), + num_entries_(num_entries) { + SetRawInputAt(0, input); + SetRawInputAt(1, method_base); + } + + bool IsControlFlow() const OVERRIDE { return true; } + + int32_t GetStartValue() const { return start_value_; } + + int32_t GetNumEntries() const { return num_entries_; } + + HX86ComputeBaseMethodAddress* GetBaseMethodAddress() const { + return InputAt(1)->AsX86ComputeBaseMethodAddress(); + } + + HBasicBlock* GetDefaultBlock() const { + // Last entry is the default block. + return GetBlock()->GetSuccessors()[num_entries_]; + } + + DECLARE_INSTRUCTION(X86PackedSwitch); + + private: + const int32_t start_value_; + const int32_t num_entries_; + + DISALLOW_COPY_AND_ASSIGN(HX86PackedSwitch); +}; + } // namespace art #endif // ART_COMPILER_OPTIMIZING_NODES_X86_H_ -- cgit v1.2.3-59-g8ed1b