JIT: Source code reorganization to isolate target independent code

Much of the register utility code is target independent.  Move it up
a level so the x86 JIT can use it.

Change-Id: Id9895a42281fd836cb1a2c942e106de94df62a9a

1 files changed, 226 insertions, 0 deletions

diff --git a/vm/compiler/codegen/Ralloc.h b/vm/compiler/codegen/Ralloc.h
new file mode 100644
index 000000000..2296fbcee
--- /dev/null
+++ b/vm/compiler/codegen/Ralloc.h
@@ -0,0 +1,226 @@
+/*
+ * Copyright (C) 2009 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+/*
+ * This file contains target independent register alloction support.
+ */
+
+#include "compiler/CompilerUtility.h"
+#include "compiler/CompilerIR.h"
+#include "compiler/Dataflow.h"
+#include "compiler/codegen/arm/ArmLIR.h"
+
+/*
+ * Return most flexible allowed register class based on size.
+ * Bug: 2813841
+ * Must use a core register for data types narrower than word (due
+ * to possible unaligned load/store.
+ */
+static inline RegisterClass dvmCompilerRegClassBySize(OpSize size)
+{
+    return (size == kUnsignedHalf ||
+            size == kSignedHalf ||
+            size == kUnsignedByte ||
+            size == kSignedByte ) ? kCoreReg : kAnyReg;
+}
+
+static inline int dvmCompilerS2VReg(CompilationUnit *cUnit, int sReg)
+{
+    assert(sReg != INVALID_SREG);
+    return DECODE_REG(dvmConvertSSARegToDalvik(cUnit, sReg));
+}
+
+/* Reset the tracker to unknown state */
+static inline void dvmCompilerResetNullCheck(CompilationUnit *cUnit)
+{
+    dvmClearAllBits(cUnit->regPool->nullCheckedRegs);
+}
+
+/*
+ * Get the "real" sreg number associated with an sReg slot.  In general,
+ * sReg values passed through codegen are the SSA names created by
+ * dataflow analysis and refer to slot numbers in the cUnit->regLocation
+ * array.  However, renaming is accomplished by simply replacing RegLocation
+ * entries in the cUnit->reglocation[] array.  Therefore, when location
+ * records for operands are first created, we need to ask the locRecord
+ * identified by the dataflow pass what it's new name is.
+ */
+
+static inline int dvmCompilerSRegHi(int lowSreg) {
+    return (lowSreg == INVALID_SREG) ? INVALID_SREG : lowSreg + 1;
+}
+
+
+static inline bool dvmCompilerLiveOut(CompilationUnit *cUnit, int sReg)
+{
+    //TODO: fully implement
+    return true;
+}
+
+static inline int dvmCompilerSSASrc(MIR *mir, int num)
+{
+    assert(mir->ssaRep->numUses > num);
+    return mir->ssaRep->uses[num];
+}
+
+extern RegLocation dvmCompilerEvalLoc(CompilationUnit *cUnit, RegLocation loc,
+                                      int regClass, bool update);
+/* Mark a temp register as dead.  Does not affect allocation state. */
+extern void dvmCompilerClobber(CompilationUnit *cUnit, int reg);
+
+extern RegLocation dvmCompilerUpdateLoc(CompilationUnit *cUnit,
+                                        RegLocation loc);
+
+/* see comments for updateLoc */
+extern RegLocation dvmCompilerUpdateLocWide(CompilationUnit *cUnit,
+                                            RegLocation loc);
+
+/* Clobber all of the temps that might be used by a handler. */
+extern void dvmCompilerClobberHandlerRegs(CompilationUnit *cUnit);
+
+extern void dvmCompilerMarkLive(CompilationUnit *cUnit, int reg, int sReg);
+
+extern void dvmCompilerMarkDirty(CompilationUnit *cUnit, int reg);
+
+extern void dvmCompilerMarkPair(CompilationUnit *cUnit, int lowReg,
+                                int highReg);
+
+extern void dvmCompilerMarkClean(CompilationUnit *cUnit, int reg);
+
+extern void dvmCompilerResetDef(CompilationUnit *cUnit, int reg);
+
+extern void dvmCompilerResetDefLoc(CompilationUnit *cUnit, RegLocation rl);
+
+/* Set up temp & preserved register pools specialized by target */
+extern void dvmCompilerInitPool(RegisterInfo *regs, int *regNums, int num);
+
+/*
+ * Mark the beginning and end LIR of a def sequence.  Note that
+ * on entry start points to the LIR prior to the beginning of the
+ * sequence.
+ */
+extern void dvmCompilerMarkDef(CompilationUnit *cUnit, RegLocation rl,
+                               LIR *start, LIR *finish);
+/*
+ * Mark the beginning and end LIR of a def sequence.  Note that
+ * on entry start points to the LIR prior to the beginning of the
+ * sequence.
+ */
+extern void dvmCompilerMarkDefWide(CompilationUnit *cUnit, RegLocation rl,
+                                   LIR *start, LIR *finish);
+
+extern RegLocation dvmCompilerGetSrcWide(CompilationUnit *cUnit, MIR *mir,
+                                         int low, int high);
+
+extern RegLocation dvmCompilerGetDestWide(CompilationUnit *cUnit, MIR *mir,
+                                          int low, int high);
+// Get the LocRecord associated with an SSA name use.
+extern RegLocation dvmCompilerGetSrc(CompilationUnit *cUnit, MIR *mir, int num);
+
+// Get the LocRecord associated with an SSA name def.
+extern RegLocation dvmCompilerGetDest(CompilationUnit *cUnit, MIR *mir,
+                                      int num);
+
+extern RegLocation dvmCompilerGetReturnWide(CompilationUnit *cUnit);
+
+/* Clobber all regs that might be used by an external C call */
+extern void dvmCompilerClobberCallRegs(CompilationUnit *cUnit);
+
+extern RegisterInfo *dvmCompilerIsTemp(CompilationUnit *cUnit, int reg);
+
+extern void dvmCompilerMarkInUse(CompilationUnit *cUnit, int reg);
+
+extern int dvmCompilerAllocTemp(CompilationUnit *cUnit);
+
+extern int dvmCompilerAllocTempFloat(CompilationUnit *cUnit);
+
+//REDO: too many assumptions.
+extern int dvmCompilerAllocTempDouble(CompilationUnit *cUnit);
+
+extern void dvmCompilerFreeTemp(CompilationUnit *cUnit, int reg);
+
+extern void dvmCompilerResetDefLocWide(CompilationUnit *cUnit, RegLocation rl);
+
+extern void dvmCompilerResetDefTracking(CompilationUnit *cUnit);
+
+/* Kill the corresponding bit in the null-checked register list */
+extern void dvmCompilerKillNullCheckedLoc(CompilationUnit *cUnit,
+                                          RegLocation loc);
+
+//FIXME - this needs to also check the preserved pool.
+extern RegisterInfo *dvmCompilerIsLive(CompilationUnit *cUnit, int reg);
+
+/* To be used when explicitly managing register use */
+extern void dvmCompilerLockAllTemps(CompilationUnit *cUnit);
+
+extern void dvmCompilerFlushAllRegs(CompilationUnit *cUnit);
+
+extern RegLocation dvmCompilerGetReturnWideAlt(CompilationUnit *cUnit);
+
+extern RegLocation dvmCompilerGetReturn(CompilationUnit *cUnit);
+
+extern RegLocation dvmCompilerGetReturnAlt(CompilationUnit *cUnit);
+
+/* Clobber any temp associated with an sReg.  Could be in either class */
+extern void dvmCompilerClobberSReg(CompilationUnit *cUnit, int sReg);
+
+/* Return a temp if one is available, -1 otherwise */
+extern int dvmCompilerAllocFreeTemp(CompilationUnit *cUnit);
+
+/*
+ * Similar to dvmCompilerAllocTemp(), but forces the allocation of a specific
+ * register.  No check is made to see if the register was previously
+ * allocated.  Use with caution.
+ */
+extern void dvmCompilerLockTemp(CompilationUnit *cUnit, int reg);
+
+extern RegLocation dvmCompilerWideToNarrow(CompilationUnit *cUnit,
+                                           RegLocation rl);
+
+/*
+ * Free all allocated temps in the temp pools.  Note that this does
+ * not affect the "liveness" of a temp register, which will stay
+ * live until it is either explicitly killed or reallocated.
+ */
+extern void dvmCompilerResetRegPool(CompilationUnit *cUnit);
+
+extern void dvmCompilerClobberAllRegs(CompilationUnit *cUnit);
+
+extern void dvmCompilerFlushRegWide(CompilationUnit *cUnit, int reg1, int reg2);
+
+extern void dvmCompilerFlushReg(CompilationUnit *cUnit, int reg);
+
+/*
+ * Architecture-dependent register allocation routines implemented in
+ * ${TARGET_ARCH}/${TARGET_ARCH_VARIANT}/Ralloc.c
+ */
+extern int dvmCompilerAllocTypedTempPair(CompilationUnit *cUnit,
+                                         bool fpHint, int regClass);
+
+extern int dvmCompilerAllocTypedTemp(CompilationUnit *cUnit, bool fpHint,
+                                     int regClass);
+
+extern ArmLIR* dvmCompilerRegCopy(CompilationUnit *cUnit, int rDest, int rSrc);
+
+extern void dvmCompilerRegCopyWide(CompilationUnit *cUnit, int destLo,
+                                   int destHi, int srcLo, int srcHi);
+
+extern void dvmCompilerFlushRegImpl(CompilationUnit *cUnit, int rBase,
+                                    int displacement, int rSrc, OpSize size);
+
+extern void dvmCompilerFlushRegWideImpl(CompilationUnit *cUnit, int rBase,
+                                        int displacement, int rSrcLo,
+                                        int rSrcHi);