Avoid register pool allocations on the heap.
Create a helper template class ArrayRef and use it instead
of std::vector<> for register pools in target_<arch>.cc to
avoid these heap allocations during program startup.
Change-Id: I4ab0205af9c1d28a239c0a105fcdc60ba800a70a
diff --git a/compiler/dex/quick/mips/target_mips.cc b/compiler/dex/quick/mips/target_mips.cc
index fcf5f94..c1a7c99 100644
--- a/compiler/dex/quick/mips/target_mips.cc
+++ b/compiler/dex/quick/mips/target_mips.cc
@@ -26,41 +26,34 @@
namespace art {
-static const RegStorage core_regs_arr[] =
+static constexpr RegStorage core_regs_arr[] =
{rs_rZERO, rs_rAT, rs_rV0, rs_rV1, rs_rA0, rs_rA1, rs_rA2, rs_rA3, rs_rT0, rs_rT1, rs_rT2,
rs_rT3, rs_rT4, rs_rT5, rs_rT6, rs_rT7, rs_rS0, rs_rS1, rs_rS2, rs_rS3, rs_rS4, rs_rS5,
rs_rS6, rs_rS7, rs_rT8, rs_rT9, rs_rK0, rs_rK1, rs_rGP, rs_rSP, rs_rFP, rs_rRA};
-static RegStorage sp_regs_arr[] =
+static constexpr RegStorage sp_regs_arr[] =
{rs_rF0, rs_rF1, rs_rF2, rs_rF3, rs_rF4, rs_rF5, rs_rF6, rs_rF7, rs_rF8, rs_rF9, rs_rF10,
rs_rF11, rs_rF12, rs_rF13, rs_rF14, rs_rF15};
-static RegStorage dp_regs_arr[] =
+static constexpr RegStorage dp_regs_arr[] =
{rs_rD0, rs_rD1, rs_rD2, rs_rD3, rs_rD4, rs_rD5, rs_rD6, rs_rD7};
-static const RegStorage reserved_regs_arr[] =
+static constexpr RegStorage reserved_regs_arr[] =
{rs_rZERO, rs_rAT, rs_rS0, rs_rS1, rs_rK0, rs_rK1, rs_rGP, rs_rSP, rs_rRA};
-static RegStorage core_temps_arr[] =
+static constexpr RegStorage core_temps_arr[] =
{rs_rV0, rs_rV1, rs_rA0, rs_rA1, rs_rA2, rs_rA3, rs_rT0, rs_rT1, rs_rT2, rs_rT3, rs_rT4,
rs_rT5, rs_rT6, rs_rT7, rs_rT8};
-static RegStorage sp_temps_arr[] =
+static constexpr RegStorage sp_temps_arr[] =
{rs_rF0, rs_rF1, rs_rF2, rs_rF3, rs_rF4, rs_rF5, rs_rF6, rs_rF7, rs_rF8, rs_rF9, rs_rF10,
rs_rF11, rs_rF12, rs_rF13, rs_rF14, rs_rF15};
-static RegStorage dp_temps_arr[] =
+static constexpr RegStorage dp_temps_arr[] =
{rs_rD0, rs_rD1, rs_rD2, rs_rD3, rs_rD4, rs_rD5, rs_rD6, rs_rD7};
-static const std::vector<RegStorage> empty_pool;
-static const std::vector<RegStorage> core_regs(core_regs_arr,
- core_regs_arr + sizeof(core_regs_arr) / sizeof(core_regs_arr[0]));
-static const std::vector<RegStorage> sp_regs(sp_regs_arr,
- sp_regs_arr + sizeof(sp_regs_arr) / sizeof(sp_regs_arr[0]));
-static const std::vector<RegStorage> dp_regs(dp_regs_arr,
- dp_regs_arr + sizeof(dp_regs_arr) / sizeof(dp_regs_arr[0]));
-static const std::vector<RegStorage> reserved_regs(reserved_regs_arr,
- reserved_regs_arr + sizeof(reserved_regs_arr) / sizeof(reserved_regs_arr[0]));
-static const std::vector<RegStorage> core_temps(core_temps_arr,
- core_temps_arr + sizeof(core_temps_arr) / sizeof(core_temps_arr[0]));
-static const std::vector<RegStorage> sp_temps(sp_temps_arr,
- sp_temps_arr + sizeof(sp_temps_arr) / sizeof(sp_temps_arr[0]));
-static const std::vector<RegStorage> dp_temps(dp_temps_arr,
- dp_temps_arr + sizeof(dp_temps_arr) / sizeof(dp_temps_arr[0]));
+static constexpr ArrayRef<const RegStorage> empty_pool;
+static constexpr ArrayRef<const RegStorage> core_regs(core_regs_arr);
+static constexpr ArrayRef<const RegStorage> sp_regs(sp_regs_arr);
+static constexpr ArrayRef<const RegStorage> dp_regs(dp_regs_arr);
+static constexpr ArrayRef<const RegStorage> reserved_regs(reserved_regs_arr);
+static constexpr ArrayRef<const RegStorage> core_temps(core_temps_arr);
+static constexpr ArrayRef<const RegStorage> sp_temps(sp_temps_arr);
+static constexpr ArrayRef<const RegStorage> dp_temps(dp_temps_arr);
RegLocation MipsMir2Lir::LocCReturn() {
return mips_loc_c_return;