Add support for float-to-long in the optimizing compiler.

- Add support for the float-to-long Dex instruction in the
  optimizing compiler.
- Add a Dex PC field to art::HTypeConversion to allow the
  x86 and ARM code generators to produce runtime calls.
- Instruct art::CodeGenerator::RecordPcInfo not to record
  PC information for HTypeConversion instructions.
- Add S0 to the list of ARM FPU parameter registers.
- Have art::x86_64::X86_64Assembler::cvttss2si work with
  64-bit operands.
- Generate x86, x86-64 and ARM (but not ARM64) code for
  float to long HTypeConversion nodes.
- Add related tests to test/422-type-conversion.

Change-Id: I954214f0d537187883f83f7a83a1bb2dd8a21fd4

1 files changed, 15 insertions, 0 deletions

diff --git a/compiler/optimizing/code_generator.cc b/compiler/optimizing/code_generator.cc
index e581af22aa..7f358eaa6b 100644
--- a/compiler/optimizing/code_generator.cc
+++ b/compiler/optimizing/code_generator.cc
@@ -499,6 +499,21 @@ void CodeGenerator::BuildStackMaps(std::vector<uint8_t>* data) {
 }
 
 void CodeGenerator::RecordPcInfo(HInstruction* instruction, uint32_t dex_pc) {
+  if (instruction != nullptr && instruction->IsTypeConversion()) {
+    // The code generated for some type conversions may call the
+    // runtime, thus normally requiring a subsequent call to this
+    // method.  However, the method verifier does not produce PC
+    // information for Dex type conversion instructions, as it
+    // considers them as "atomic" (they cannot join a GC).
+    // Therefore we do not currently record PC information for such
+    // instructions.  As this may change later, we added this special
+    // case so that code generators may nevertheless call
+    // CodeGenerator::RecordPcInfo without triggering an error in
+    // CodeGenerator::BuildNativeGCMap ("Missing ref for dex pc 0x")
+    // thereafter.
+    return;
+  }
+
   // Collect PC infos for the mapping table.
   struct PcInfo pc_info;
   pc_info.dex_pc = dex_pc;