diff options
Diffstat (limited to 'src/jit/codegenarm.cpp')
| -rw-r--r-- | src/jit/codegenarm.cpp | 1078 |
1 files changed, 16 insertions, 1062 deletions
diff --git a/src/jit/codegenarm.cpp b/src/jit/codegenarm.cpp index 4ce82307f9..73e51f2ef7 100644 --- a/src/jit/codegenarm.cpp +++ b/src/jit/codegenarm.cpp @@ -27,102 +27,6 @@ XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX #include "gcinfoencoder.h" #endif -// Get the register assigned to the given node - -regNumber CodeGenInterface::genGetAssignedReg(GenTreePtr tree) -{ - return tree->gtRegNum; -} - -//------------------------------------------------------------------------ -// genSpillVar: Spill a local variable -// -// Arguments: -// tree - the lclVar node for the variable being spilled -// -// Return Value: -// None. -// -// Assumptions: -// The lclVar must be a register candidate (lvRegCandidate) - -void CodeGen::genSpillVar(GenTreePtr tree) -{ - regMaskTP regMask; - unsigned varNum = tree->gtLclVarCommon.gtLclNum; - LclVarDsc* varDsc = &(compiler->lvaTable[varNum]); - - // We don't actually need to spill if it is already living in memory - bool needsSpill = ((tree->gtFlags & GTF_VAR_DEF) == 0 && varDsc->lvIsInReg()); - if (needsSpill) - { - bool restoreRegVar = false; - if (tree->gtOper == GT_REG_VAR) - { - tree->SetOper(GT_LCL_VAR); - restoreRegVar = true; - } - - // mask off the flag to generate the right spill code, then bring it back - tree->gtFlags &= ~GTF_REG_VAL; - - instruction storeIns = ins_Store(tree->TypeGet()); - - if (varTypeIsMultiReg(tree)) - { - assert(varDsc->lvRegNum == genRegPairLo(tree->gtRegPair)); - assert(varDsc->lvOtherReg == genRegPairHi(tree->gtRegPair)); - regNumber regLo = genRegPairLo(tree->gtRegPair); - regNumber regHi = genRegPairHi(tree->gtRegPair); - inst_TT_RV(storeIns, tree, regLo); - inst_TT_RV(storeIns, tree, regHi, 4); - } - else - { - assert(varDsc->lvRegNum == tree->gtRegNum); - inst_TT_RV(storeIns, tree, tree->gtRegNum); - } - tree->gtFlags |= GTF_REG_VAL; - - if (restoreRegVar) - { - tree->SetOper(GT_REG_VAR); - } - - genUpdateRegLife(varDsc, /*isBorn*/ false, /*isDying*/ true DEBUGARG(tree)); - gcInfo.gcMarkRegSetNpt(varDsc->lvRegMask()); - - if (VarSetOps::IsMember(compiler, gcInfo.gcTrkStkPtrLcls, varDsc->lvVarIndex)) - { -#ifdef DEBUG - if (!VarSetOps::IsMember(compiler, gcInfo.gcVarPtrSetCur, varDsc->lvVarIndex)) - { - JITDUMP("\t\t\t\t\t\t\tVar V%02u becoming live\n", varNum); - } - else - { - JITDUMP("\t\t\t\t\t\t\tVar V%02u continuing live\n", varNum); - } -#endif - VarSetOps::AddElemD(compiler, gcInfo.gcVarPtrSetCur, varDsc->lvVarIndex); - } - } - - tree->gtFlags &= ~GTF_SPILL; - varDsc->lvRegNum = REG_STK; - if (varTypeIsMultiReg(tree)) - { - varDsc->lvOtherReg = REG_STK; - } -} - -// inline -void CodeGenInterface::genUpdateVarReg(LclVarDsc* varDsc, GenTreePtr tree) -{ - assert(tree->OperIsScalarLocal() || (tree->gtOper == GT_COPY)); - varDsc->lvRegNum = tree->gtRegNum; -} - /***************************************************************************** * * Generate code that will set the given register to the integer constant. @@ -157,735 +61,22 @@ void CodeGen::genSetRegToIcon(regNumber reg, ssize_t val, var_types type, insFla */ void CodeGen::genEmitGSCookieCheck(bool pushReg) { - NYI("ARM genEmitGSCookieCheck is not yet implemented for protojit"); + NYI("ARM genEmitGSCookieCheck"); } -/***************************************************************************** - * - * Generate code for all the basic blocks in the function. - */ - -void CodeGen::genCodeForBBlist() +BasicBlock* CodeGen::genCallFinally(BasicBlock* block, BasicBlock* lblk) { - unsigned varNum; - LclVarDsc* varDsc; - - unsigned savedStkLvl; - -#ifdef DEBUG - genInterruptibleUsed = true; - - // You have to be careful if you create basic blocks from now on - compiler->fgSafeBasicBlockCreation = false; - - // This stress mode is not comptible with fully interruptible GC - if (genInterruptible && compiler->opts.compStackCheckOnCall) - { - compiler->opts.compStackCheckOnCall = false; - } - - // This stress mode is not comptible with fully interruptible GC - if (genInterruptible && compiler->opts.compStackCheckOnRet) - { - compiler->opts.compStackCheckOnRet = false; - } -#endif - - // Prepare the blocks for exception handling codegen: mark the blocks that needs labels. - genPrepForEHCodegen(); - - assert(!compiler->fgFirstBBScratch || - compiler->fgFirstBB == compiler->fgFirstBBScratch); // compiler->fgFirstBBScratch has to be first. - - /* Initialize the spill tracking logic */ - - regSet.rsSpillBeg(); - -#ifdef DEBUGGING_SUPPORT - /* Initialize the line# tracking logic */ - - if (compiler->opts.compScopeInfo) - { - siInit(); - } -#endif - - if (compiler->opts.compDbgEnC) - { - noway_assert(isFramePointerUsed()); - regSet.rsSetRegsModified(RBM_INT_CALLEE_SAVED & ~RBM_FPBASE); - } - - /* If we have any pinvoke calls, we might potentially trash everything */ - if (compiler->info.compCallUnmanaged) - { - noway_assert(isFramePointerUsed()); // Setup of Pinvoke frame currently requires an EBP style frame - regSet.rsSetRegsModified(RBM_INT_CALLEE_SAVED & ~RBM_FPBASE); - } - - genPendingCallLabel = nullptr; - - /* Initialize the pointer tracking code */ - - gcInfo.gcRegPtrSetInit(); - gcInfo.gcVarPtrSetInit(); - - /* If any arguments live in registers, mark those regs as such */ - - for (varNum = 0, varDsc = compiler->lvaTable; varNum < compiler->lvaCount; varNum++, varDsc++) - { - /* Is this variable a parameter assigned to a register? */ - - if (!varDsc->lvIsParam || !varDsc->lvRegister) - continue; - - /* Is the argument live on entry to the method? */ - - if (!VarSetOps::IsMember(compiler, compiler->fgFirstBB->bbLiveIn, varDsc->lvVarIndex)) - continue; - - /* Is this a floating-point argument? */ - - if (varDsc->IsFloatRegType()) - continue; - - noway_assert(!varTypeIsFloating(varDsc->TypeGet())); - - /* Mark the register as holding the variable */ - - regTracker.rsTrackRegLclVar(varDsc->lvRegNum, varNum); - } - - unsigned finallyNesting = 0; - - // Make sure a set is allocated for compiler->compCurLife (in the long case), so we can set it to empty without - // allocation at the start of each basic block. - VarSetOps::AssignNoCopy(compiler, compiler->compCurLife, VarSetOps::MakeEmpty(compiler)); - - /*------------------------------------------------------------------------- - * - * Walk the basic blocks and generate code for each one - * - */ - - BasicBlock* block; - BasicBlock* lblk; /* previous block */ - - for (lblk = NULL, block = compiler->fgFirstBB; block != NULL; lblk = block, block = block->bbNext) - { -#ifdef DEBUG - if (compiler->verbose) - { - printf("\n=============== Generating "); - block->dspBlockHeader(compiler, true, true); - compiler->fgDispBBLiveness(block); - } -#endif // DEBUG - - /* Figure out which registers hold variables on entry to this block */ - - regSet.ClearMaskVars(); - gcInfo.gcRegGCrefSetCur = RBM_NONE; - gcInfo.gcRegByrefSetCur = RBM_NONE; - - compiler->m_pLinearScan->recordVarLocationsAtStartOfBB(block); - - genUpdateLife(block->bbLiveIn); - - // Even if liveness didn't change, we need to update the registers containing GC references. - // genUpdateLife will update the registers live due to liveness changes. But what about registers that didn't - // change? We cleared them out above. Maybe we should just not clear them out, but update the ones that change - // here. That would require handling the changes in recordVarLocationsAtStartOfBB(). - - regMaskTP newLiveRegSet = RBM_NONE; - regMaskTP newRegGCrefSet = RBM_NONE; - regMaskTP newRegByrefSet = RBM_NONE; - VARSET_ITER_INIT(compiler, iter, block->bbLiveIn, varIndex); - while (iter.NextElem(compiler, &varIndex)) - { - unsigned varNum = compiler->lvaTrackedToVarNum[varIndex]; - LclVarDsc* varDsc = &(compiler->lvaTable[varNum]); - - if (varDsc->lvIsInReg()) - { - newLiveRegSet |= varDsc->lvRegMask(); - if (varDsc->lvType == TYP_REF) - { - newRegGCrefSet |= varDsc->lvRegMask(); - } - else if (varDsc->lvType == TYP_BYREF) - { - newRegByrefSet |= varDsc->lvRegMask(); - } - } - else if (varDsc->lvType == TYP_REF || varDsc->lvType == TYP_BYREF) - { - VarSetOps::AddElemD(compiler, gcInfo.gcVarPtrSetCur, varIndex); - } - } - - regSet.rsMaskVars = newLiveRegSet; - gcInfo.gcMarkRegSetGCref(newRegGCrefSet DEBUGARG(true)); - gcInfo.gcMarkRegSetByref(newRegByrefSet DEBUGARG(true)); - - /* Blocks with handlerGetsXcptnObj()==true use GT_CATCH_ARG to - represent the exception object (TYP_REF). - We mark REG_EXCEPTION_OBJECT as holding a GC object on entry - to the block, it will be the first thing evaluated - (thanks to GTF_ORDER_SIDEEFF). - */ - - if (handlerGetsXcptnObj(block->bbCatchTyp)) - { - for (GenTree* node : LIR::AsRange(block)) - { - if (node->OperGet() == GT_CATCH_ARG) - { - gcInfo.gcMarkRegSetGCref(RBM_EXCEPTION_OBJECT); - break; - } - } - } - - /* Start a new code output block */ - CLANG_FORMAT_COMMENT_ANCHOR; - -#if FEATURE_EH_FUNCLETS -#if defined(_TARGET_ARM_) - // If this block is the target of a finally return, we need to add a preceding NOP, in the same EH region, - // so the unwinder doesn't get confused by our "movw lr, xxx; movt lr, xxx; b Lyyy" calling convention that - // calls the funclet during non-exceptional control flow. - if (block->bbFlags & BBF_FINALLY_TARGET) - { - assert(block->bbFlags & BBF_JMP_TARGET); - -#ifdef DEBUG - if (compiler->verbose) - { - printf("\nEmitting finally target NOP predecessor for BB%02u\n", block->bbNum); - } -#endif - // Create a label that we'll use for computing the start of an EH region, if this block is - // at the beginning of such a region. If we used the existing bbEmitCookie as is for - // determining the EH regions, then this NOP would end up outside of the region, if this - // block starts an EH region. If we pointed the existing bbEmitCookie here, then the NOP - // would be executed, which we would prefer not to do. - - block->bbUnwindNopEmitCookie = - getEmitter()->emitAddLabel(gcInfo.gcVarPtrSetCur, gcInfo.gcRegGCrefSetCur, gcInfo.gcRegByrefSetCur); - - instGen(INS_nop); - } -#endif // defined(_TARGET_ARM_) - - genUpdateCurrentFunclet(block); -#endif // FEATURE_EH_FUNCLETS - -#ifdef _TARGET_XARCH_ - if (genAlignLoops && block->bbFlags & BBF_LOOP_HEAD) - { - getEmitter()->emitLoopAlign(); - } -#endif - -#ifdef DEBUG - if (compiler->opts.dspCode) - printf("\n L_M%03u_BB%02u:\n", Compiler::s_compMethodsCount, block->bbNum); -#endif - - block->bbEmitCookie = NULL; - - if (block->bbFlags & (BBF_JMP_TARGET | BBF_HAS_LABEL)) - { - /* Mark a label and update the current set of live GC refs */ - - block->bbEmitCookie = - getEmitter()->emitAddLabel(gcInfo.gcVarPtrSetCur, gcInfo.gcRegGCrefSetCur, gcInfo.gcRegByrefSetCur, - /*isFinally*/ block->bbFlags & BBF_FINALLY_TARGET); - } - - if (block == compiler->fgFirstColdBlock) - { -#ifdef DEBUG - if (compiler->verbose) - { - printf("\nThis is the start of the cold region of the method\n"); - } -#endif - // We should never have a block that falls through into the Cold section - noway_assert(!lblk->bbFallsThrough()); - - // We require the block that starts the Cold section to have a label - noway_assert(block->bbEmitCookie); - getEmitter()->emitSetFirstColdIGCookie(block->bbEmitCookie); - } - - /* Both stacks are always empty on entry to a basic block */ - - genStackLevel = 0; - -#if !FEATURE_FIXED_OUT_ARGS - /* Check for inserted throw blocks and adjust genStackLevel */ - - if (!isFramePointerUsed() && compiler->fgIsThrowHlpBlk(block)) - { - noway_assert(block->bbFlags & BBF_JMP_TARGET); - - genStackLevel = compiler->fgThrowHlpBlkStkLevel(block) * sizeof(int); - - if (genStackLevel) - { - NYI("Need emitMarkStackLvl()"); - } - } -#endif // !FEATURE_FIXED_OUT_ARGS - - savedStkLvl = genStackLevel; - - /* Tell everyone which basic block we're working on */ - - compiler->compCurBB = block; - -#ifdef DEBUGGING_SUPPORT - siBeginBlock(block); - - // BBF_INTERNAL blocks don't correspond to any single IL instruction. - if (compiler->opts.compDbgInfo && (block->bbFlags & BBF_INTERNAL) && block != compiler->fgFirstBB) - genIPmappingAdd((IL_OFFSETX)ICorDebugInfo::NO_MAPPING, true); - - bool firstMapping = true; -#endif // DEBUGGING_SUPPORT - - /*--------------------------------------------------------------------- - * - * Generate code for each statement-tree in the block - * - */ - CLANG_FORMAT_COMMENT_ANCHOR; - -#if FEATURE_EH_FUNCLETS - if (block->bbFlags & BBF_FUNCLET_BEG) - { - genReserveFuncletProlog(block); - } -#endif // FEATURE_EH_FUNCLETS - - // Clear compCurStmt and compCurLifeTree. - compiler->compCurStmt = nullptr; - compiler->compCurLifeTree = nullptr; - -#ifdef DEBUG - bool pastProfileUpdate = false; -#endif - -// Traverse the block in linear order, generating code for each node as we -// as we encounter it. -#ifdef DEBUGGING_SUPPORT - IL_OFFSETX currentILOffset = BAD_IL_OFFSET; -#endif - for (GenTree* node : LIR::AsRange(block)) - { -#ifdef DEBUGGING_SUPPORT - // Do we have a new IL offset? - if (node->OperGet() == GT_IL_OFFSET) - { - genEnsureCodeEmitted(currentILOffset); - - currentILOffset = node->gtStmt.gtStmtILoffsx; - - genIPmappingAdd(currentILOffset, firstMapping); - firstMapping = false; - } -#endif // DEBUGGING_SUPPORT - -#ifdef DEBUG - if (node->OperGet() == GT_IL_OFFSET) - { - noway_assert(node->gtStmt.gtStmtLastILoffs <= compiler->info.compILCodeSize || - node->gtStmt.gtStmtLastILoffs == BAD_IL_OFFSET); - - if (compiler->opts.dspCode && compiler->opts.dspInstrs && - node->gtStmt.gtStmtLastILoffs != BAD_IL_OFFSET) - { - while (genCurDispOffset <= node->gtStmt.gtStmtLastILoffs) - { - genCurDispOffset += dumpSingleInstr(compiler->info.compCode, genCurDispOffset, "> "); - } - } - } -#endif // DEBUG - - genCodeForTreeNode(node); - if (node->gtHasReg() && node->gtLsraInfo.isLocalDefUse) - { - genConsumeReg(node); - } - -#ifdef DEBUG - regSet.rsSpillChk(); - - assert((node->gtFlags & GTF_SPILL) == 0); - - /* Make sure we didn't bungle pointer register tracking */ - - regMaskTP ptrRegs = (gcInfo.gcRegGCrefSetCur | gcInfo.gcRegByrefSetCur); - regMaskTP nonVarPtrRegs = ptrRegs & ~regSet.rsMaskVars; - - // If return is a GC-type, clear it. Note that if a common - // epilog is generated (genReturnBB) it has a void return - // even though we might return a ref. We can't use the compRetType - // as the determiner because something we are tracking as a byref - // might be used as a return value of a int function (which is legal) - if (node->gtOper == GT_RETURN && (varTypeIsGC(compiler->info.compRetType) || - (node->gtOp.gtOp1 != 0 && varTypeIsGC(node->gtOp.gtOp1->TypeGet())))) - { - nonVarPtrRegs &= ~RBM_INTRET; - } - - // When profiling, the first few nodes in a catch block will be an update of - // the profile count (does not interfere with the exception object). - if (((compiler->opts.eeFlags & CORJIT_FLG_BBINSTR) != 0) && handlerGetsXcptnObj(block->bbCatchTyp)) - { - pastProfileUpdate = pastProfileUpdate || node->OperGet() == GT_CATCH_ARG; - if (!pastProfileUpdate) - { - nonVarPtrRegs &= ~RBM_EXCEPTION_OBJECT; - } - } - - if (nonVarPtrRegs) - { - printf("Regset after node="); - Compiler::printTreeID(node); - printf(" BB%02u gcr=", block->bbNum); - printRegMaskInt(gcInfo.gcRegGCrefSetCur & ~regSet.rsMaskVars); - compiler->getEmitter()->emitDispRegSet(gcInfo.gcRegGCrefSetCur & ~regSet.rsMaskVars); - printf(", byr="); - printRegMaskInt(gcInfo.gcRegByrefSetCur & ~regSet.rsMaskVars); - compiler->getEmitter()->emitDispRegSet(gcInfo.gcRegByrefSetCur & ~regSet.rsMaskVars); - printf(", regVars="); - printRegMaskInt(regSet.rsMaskVars); - compiler->getEmitter()->emitDispRegSet(regSet.rsMaskVars); - printf("\n"); - } - - noway_assert(nonVarPtrRegs == 0); -#endif // DEBUG - } - -#ifdef DEBUGGING_SUPPORT - // It is possible to reach the end of the block without generating code for the current IL offset. - // For example, if the following IR ends the current block, no code will have been generated for - // offset 21: - // - // ( 0, 0) [000040] ------------ il_offset void IL offset: 21 - // - // N001 ( 0, 0) [000039] ------------ nop void - // - // This can lead to problems when debugging the generated code. To prevent these issues, make sure - // we've generated code for the last IL offset we saw in the block. - genEnsureCodeEmitted(currentILOffset); - - if (compiler->opts.compScopeInfo && (compiler->info.compVarScopesCount > 0)) - { - siEndBlock(block); - - /* Is this the last block, and are there any open scopes left ? */ - - bool isLastBlockProcessed = (block->bbNext == NULL); - if (block->isBBCallAlwaysPair()) - { - isLastBlockProcessed = (block->bbNext->bbNext == NULL); - } - - if (isLastBlockProcessed && siOpenScopeList.scNext) - { - /* This assert no longer holds, because we may insert a throw - block to demarcate the end of a try or finally region when they - are at the end of the method. It would be nice if we could fix - our code so that this throw block will no longer be necessary. */ - - // noway_assert(block->bbCodeOffsEnd != compiler->info.compILCodeSize); - - siCloseAllOpenScopes(); - } - } - -#endif // DEBUGGING_SUPPORT - - genStackLevel -= savedStkLvl; - -#ifdef DEBUG - // compCurLife should be equal to the liveOut set, except that we don't keep - // it up to date for vars that are not register candidates - // (it would be nice to have a xor set function) - - VARSET_TP VARSET_INIT_NOCOPY(extraLiveVars, VarSetOps::Diff(compiler, block->bbLiveOut, compiler->compCurLife)); - VarSetOps::UnionD(compiler, extraLiveVars, VarSetOps::Diff(compiler, compiler->compCurLife, block->bbLiveOut)); - VARSET_ITER_INIT(compiler, extraLiveVarIter, extraLiveVars, extraLiveVarIndex); - while (extraLiveVarIter.NextElem(compiler, &extraLiveVarIndex)) - { - unsigned varNum = compiler->lvaTrackedToVarNum[extraLiveVarIndex]; - LclVarDsc* varDsc = compiler->lvaTable + varNum; - assert(!varDsc->lvIsRegCandidate()); - } -#endif - - /* Both stacks should always be empty on exit from a basic block */ - - noway_assert(genStackLevel == 0); - -#ifdef _TARGET_AMD64_ - // On AMD64, we need to generate a NOP after a call that is the last instruction of the block, in several - // situations, to support proper exception handling semantics. This is mostly to ensure that when the stack - // walker computes an instruction pointer for a frame, that instruction pointer is in the correct EH region. - // The document "X64 and ARM ABIs.docx" has more details. The situations: - // 1. If the call instruction is in a different EH region as the instruction that follows it. - // 2. If the call immediately precedes an OS epilog. (Note that what the JIT or VM consider an epilog might - // be slightly different from what the OS considers an epilog, and it is the OS-reported epilog that matters - // here.) - // We handle case #1 here, and case #2 in the emitter. - if (getEmitter()->emitIsLastInsCall()) - { - // Ok, the last instruction generated is a call instruction. Do any of the other conditions hold? - // Note: we may be generating a few too many NOPs for the case of call preceding an epilog. Technically, - // if the next block is a BBJ_RETURN, an epilog will be generated, but there may be some instructions - // generated before the OS epilog starts, such as a GS cookie check. - if ((block->bbNext == nullptr) || !BasicBlock::sameEHRegion(block, block->bbNext)) - { - // We only need the NOP if we're not going to generate any more code as part of the block end. - - switch (block->bbJumpKind) - { - case BBJ_ALWAYS: - case BBJ_THROW: - case BBJ_CALLFINALLY: - case BBJ_EHCATCHRET: - // We're going to generate more code below anyway, so no need for the NOP. - - case BBJ_RETURN: - case BBJ_EHFINALLYRET: - case BBJ_EHFILTERRET: - // These are the "epilog follows" case, handled in the emitter. - - break; - - case BBJ_NONE: - if (block->bbNext == nullptr) - { - // Call immediately before the end of the code; we should never get here . - instGen(INS_BREAKPOINT); // This should never get executed - } - else - { - // We need the NOP - instGen(INS_nop); - } - break; - - case BBJ_COND: - case BBJ_SWITCH: - // These can't have a call as the last instruction! - - default: - noway_assert(!"Unexpected bbJumpKind"); - break; - } - } - } -#endif //_TARGET_AMD64_ - - /* Do we need to generate a jump or return? */ - - switch (block->bbJumpKind) - { - case BBJ_ALWAYS: - inst_JMP(EJ_jmp, block->bbJumpDest); - break; - - case BBJ_RETURN: - genExitCode(block); - break; - - case BBJ_THROW: - // If we have a throw at the end of a function or funclet, we need to emit another instruction - // afterwards to help the OS unwinder determine the correct context during unwind. - // We insert an unexecuted breakpoint instruction in several situations - // following a throw instruction: - // 1. If the throw is the last instruction of the function or funclet. This helps - // the OS unwinder determine the correct context during an unwind from the - // thrown exception. - // 2. If this is this is the last block of the hot section. - // 3. If the subsequent block is a special throw block. - // 4. On AMD64, if the next block is in a different EH region. - if ((block->bbNext == NULL) -#if FEATURE_EH_FUNCLETS - || (block->bbNext->bbFlags & BBF_FUNCLET_BEG) -#endif // FEATURE_EH_FUNCLETS -#ifdef _TARGET_AMD64_ - || !BasicBlock::sameEHRegion(block, block->bbNext) -#endif // _TARGET_AMD64_ - || (!isFramePointerUsed() && compiler->fgIsThrowHlpBlk(block->bbNext)) || - block->bbNext == compiler->fgFirstColdBlock) - { - instGen(INS_BREAKPOINT); // This should never get executed - } - - break; - - case BBJ_CALLFINALLY: - - // Now set REG_LR to the address of where the finally funclet should - // return to directly. - - BasicBlock* bbFinallyRet; - bbFinallyRet = NULL; - - // We don't have retless calls, since we use the BBJ_ALWAYS to point at a NOP pad where - // we would have otherwise created retless calls. - assert(block->isBBCallAlwaysPair()); - - assert(block->bbNext != NULL); - assert(block->bbNext->bbJumpKind == BBJ_ALWAYS); - assert(block->bbNext->bbJumpDest != NULL); - assert(block->bbNext->bbJumpDest->bbFlags & BBF_FINALLY_TARGET); - - bbFinallyRet = block->bbNext->bbJumpDest; - bbFinallyRet->bbFlags |= BBF_JMP_TARGET; - -#if 0 - // TODO-ARM-CQ: - // We don't know the address of finally funclet yet. But adr requires the offset - // to finally funclet from current IP is within 4095 bytes. So this code is disabled - // for now. - getEmitter()->emitIns_J_R (INS_adr, - EA_4BYTE, - bbFinallyRet, - REG_LR); -#else // !0 - // Load the address where the finally funclet should return into LR. - // The funclet prolog/epilog will do "push {lr}" / "pop {pc}" to do - // the return. - getEmitter()->emitIns_R_L(INS_movw, EA_4BYTE_DSP_RELOC, bbFinallyRet, REG_LR); - getEmitter()->emitIns_R_L(INS_movt, EA_4BYTE_DSP_RELOC, bbFinallyRet, REG_LR); -#endif // !0 - - // Jump to the finally BB - inst_JMP(EJ_jmp, block->bbJumpDest); - - // The BBJ_ALWAYS is used because the BBJ_CALLFINALLY can't point to the - // jump target using bbJumpDest - that is already used to point - // to the finally block. So just skip past the BBJ_ALWAYS unless the - // block is RETLESS. - if (!(block->bbFlags & BBF_RETLESS_CALL)) - { - assert(block->isBBCallAlwaysPair()); - - lblk = block; - block = block->bbNext; - } - break; - -#ifdef _TARGET_ARM_ - - case BBJ_EHCATCHRET: - // set r0 to the address the VM should return to after the catch - getEmitter()->emitIns_R_L(INS_movw, EA_4BYTE_DSP_RELOC, block->bbJumpDest, REG_R0); - getEmitter()->emitIns_R_L(INS_movt, EA_4BYTE_DSP_RELOC, block->bbJumpDest, REG_R0); - - __fallthrough; - - case BBJ_EHFINALLYRET: - case BBJ_EHFILTERRET: - genReserveFuncletEpilog(block); - break; - -#elif defined(_TARGET_AMD64_) - - case BBJ_EHCATCHRET: - // Set EAX to the address the VM should return to after the catch. - // Generate a RIP-relative - // lea reg, [rip + disp32] ; the RIP is implicit - // which will be position-indepenent. - // TODO-ARM-Bug?: For ngen, we need to generate a reloc for the displacement (maybe EA_PTR_DSP_RELOC). - getEmitter()->emitIns_R_L(INS_lea, EA_PTRSIZE, block->bbJumpDest, REG_INTRET); - __fallthrough; - - case BBJ_EHFINALLYRET: - case BBJ_EHFILTERRET: - genReserveFuncletEpilog(block); - break; - -#endif // _TARGET_AMD64_ - - case BBJ_NONE: - case BBJ_COND: - case BBJ_SWITCH: - break; - - default: - noway_assert(!"Unexpected bbJumpKind"); - break; - } - -#ifdef DEBUG - compiler->compCurBB = 0; -#endif - - } //------------------ END-FOR each block of the method ------------------- - - /* Nothing is live at this point */ - genUpdateLife(VarSetOps::MakeEmpty(compiler)); - - /* Finalize the spill tracking logic */ - - regSet.rsSpillEnd(); - - /* Finalize the temp tracking logic */ - - compiler->tmpEnd(); - -#ifdef DEBUG - if (compiler->verbose) - { - printf("\n# "); - printf("compCycleEstimate = %6d, compSizeEstimate = %5d ", compiler->compCycleEstimate, compiler->compSizeEstimate); - printf("%s\n", compiler->info.compFullName); - } -#endif + NYI("ARM genCallFinally"); + return block; } -// return the child that has the same reg as the dst (if any) -// other child returned (out param) in 'other' -GenTree* sameRegAsDst(GenTree* tree, GenTree*& other /*out*/) -{ - if (tree->gtRegNum == REG_NA) - { - other = nullptr; - return NULL; - } +// move an immediate value into an integer register - GenTreePtr op1 = tree->gtOp.gtOp1->gtEffectiveVal(); - GenTreePtr op2 = tree->gtOp.gtOp2->gtEffectiveVal(); - if (op1->gtRegNum == tree->gtRegNum) - { - other = op2; - return op1; - } - if (op2->gtRegNum == tree->gtRegNum) - { - other = op1; - return op2; - } - else - { - other = nullptr; - return NULL; - } +void CodeGen::genEHCatchRet(BasicBlock* block) +{ + NYI("ARM genEHCatchRet"); } -// move an immediate value into an integer register - void CodeGen::instGen_Set_Reg_To_Imm(emitAttr size, regNumber reg, ssize_t imm, insFlags flags) { // reg cannot be a FP register @@ -902,16 +93,7 @@ void CodeGen::instGen_Set_Reg_To_Imm(emitAttr size, regNumber reg, ssize_t imm, } else { -#ifdef _TARGET_AMD64_ - if (AddrShouldUsePCRel(imm)) - { - getEmitter()->emitIns_R_AI(INS_lea, EA_PTR_DSP_RELOC, reg, imm); - } - else -#endif // _TARGET_AMD64_ - { - getEmitter()->emitIns_R_I(INS_mov, size, reg, imm); - } + getEmitter()->emitIns_R_I(INS_mov, size, reg, imm); } regTracker.rsTrackRegIntCns(reg, imm); } @@ -1423,6 +605,7 @@ void CodeGen::genCodeForTreeNode(GenTreePtr treeNode) break; case GT_LIST: + case GT_FIELD_LIST: case GT_ARGPLACE: // Nothing to do break; @@ -1479,7 +662,7 @@ void CodeGen::genCodeForTreeNode(GenTreePtr treeNode) case GT_LOCKADD: case GT_XCHG: case GT_XADD: - genLockedInstructions(treeNode); + genLockedInstructions(treeNode->AsOp()); break; case GT_CMPXCHG: @@ -1554,7 +737,8 @@ void CodeGen::genCodeForTreeNode(GenTreePtr treeNode) { #ifdef DEBUG char message[256]; - sprintf(message, "NYI: Unimplemented node type %s\n", GenTree::NodeName(treeNode->OperGet())); + _snprintf_s(message, _countof(message), _TRUNCATE, "NYI: Unimplemented node type %s\n", + GenTree::NodeName(treeNode->OperGet())); notYetImplemented(message, __FILE__, __LINE__); #else NYI("unimplemented node"); @@ -1566,7 +750,7 @@ void CodeGen::genCodeForTreeNode(GenTreePtr treeNode) // generate code for the locked operations: // GT_LOCKADD, GT_XCHG, GT_XADD -void CodeGen::genLockedInstructions(GenTree* treeNode) +void CodeGen::genLockedInstructions(GenTreeOp* treeNode) { NYI("genLockedInstructions"); } @@ -1697,188 +881,9 @@ void CodeGen::genCodeForShift(GenTreePtr tree) NYI("genCodeForShift"); } -void CodeGen::genUnspillRegIfNeeded(GenTree* tree) -{ - regNumber dstReg = tree->gtRegNum; - - GenTree* unspillTree = tree; - if (tree->gtOper == GT_RELOAD) - { - unspillTree = tree->gtOp.gtOp1; - } - if (unspillTree->gtFlags & GTF_SPILLED) - { - if (genIsRegCandidateLocal(unspillTree)) - { - // Reset spilled flag, since we are going to load a local variable from its home location. - unspillTree->gtFlags &= ~GTF_SPILLED; - - // Load local variable from its home location. - inst_RV_TT(ins_Load(unspillTree->gtType), dstReg, unspillTree); - - unspillTree->SetInReg(); - - GenTreeLclVarCommon* lcl = unspillTree->AsLclVarCommon(); - LclVarDsc* varDsc = &compiler->lvaTable[lcl->gtLclNum]; - - // TODO-Review: We would like to call: - // genUpdateRegLife(varDsc, /*isBorn*/ true, /*isDying*/ false DEBUGARG(tree)); - // instead of the following code, but this ends up hitting this assert: - // assert((regSet.rsMaskVars & regMask) == 0); - // due to issues with LSRA resolution moves. - // So, just force it for now. This probably indicates a condition that creates a GC hole! - // - // Extra note: I think we really want to call something like gcInfo.gcUpdateForRegVarMove, - // because the variable is not really going live or dead, but that method is somewhat poorly - // factored because it, in turn, updates rsMaskVars which is part of RegSet not GCInfo. - // TODO-Cleanup: This code exists in other CodeGen*.cpp files, and should be moved to CodeGenCommon.cpp. - - genUpdateVarReg(varDsc, tree); -#ifdef DEBUG - if (VarSetOps::IsMember(compiler, gcInfo.gcVarPtrSetCur, varDsc->lvVarIndex)) - { - JITDUMP("\t\t\t\t\t\t\tRemoving V%02u from gcVarPtrSetCur\n", lcl->gtLclNum); - } -#endif // DEBUG - VarSetOps::RemoveElemD(compiler, gcInfo.gcVarPtrSetCur, varDsc->lvVarIndex); - -#ifdef DEBUG - if (compiler->verbose) - { - printf("\t\t\t\t\t\t\tV%02u in reg ", lcl->gtLclNum); - varDsc->PrintVarReg(); - printf(" is becoming live "); - Compiler::printTreeID(unspillTree); - printf("\n"); - } -#endif // DEBUG - - regSet.AddMaskVars(genGetRegMask(varDsc)); - } - else - { - TempDsc* t = regSet.rsUnspillInPlace(unspillTree, unspillTree->gtRegNum); - compiler->tmpRlsTemp(t); - getEmitter()->emitIns_R_S(ins_Load(unspillTree->gtType), emitActualTypeSize(unspillTree->gtType), dstReg, - t->tdTempNum(), 0); - - unspillTree->SetInReg(); - } - - gcInfo.gcMarkRegPtrVal(dstReg, unspillTree->TypeGet()); - } -} - -// do liveness update for a subnode that is being consumed by codegen -regNumber CodeGen::genConsumeReg(GenTree* tree) -{ - genUnspillRegIfNeeded(tree); - - // genUpdateLife() will also spill local var if marked as GTF_SPILL by calling CodeGen::genSpillVar - genUpdateLife(tree); - assert(tree->gtRegNum != REG_NA); - - // there are three cases where consuming a reg means clearing the bit in the live mask - // 1. it was not produced by a local - // 2. it was produced by a local that is going dead - // 3. it was produced by a local that does not live in that reg (like one allocated on the stack) - - if (genIsRegCandidateLocal(tree)) - { - GenTreeLclVarCommon* lcl = tree->AsLclVarCommon(); - LclVarDsc* varDsc = &compiler->lvaTable[lcl->GetLclNum()]; - - if (varDsc->lvRegNum == tree->gtRegNum && ((tree->gtFlags & GTF_VAR_DEATH) != 0)) - { - gcInfo.gcMarkRegSetNpt(genRegMask(tree->gtRegNum)); - } - else if (!varDsc->lvLRACandidate) - { - gcInfo.gcMarkRegSetNpt(genRegMask(tree->gtRegNum)); - } - } - else - { - gcInfo.gcMarkRegSetNpt(genRegMask(tree->gtRegNum)); - } - - return tree->gtRegNum; -} - -// Do liveness update for an address tree: one of GT_LEA, GT_LCL_VAR, or GT_CNS_INT (for call indirect). -void CodeGen::genConsumeAddress(GenTree* addr) -{ - if (addr->OperGet() == GT_LEA) - { - genConsumeAddrMode(addr->AsAddrMode()); - } - else - { - assert(!addr->isContained()); - genConsumeReg(addr); - } -} - -// do liveness update for a subnode that is being consumed by codegen -void CodeGen::genConsumeAddrMode(GenTreeAddrMode* addr) +void CodeGen::genRegCopy(GenTree* treeNode) { - if (addr->Base()) - genConsumeReg(addr->Base()); - if (addr->Index()) - genConsumeReg(addr->Index()); -} - -// do liveness update for register produced by the current node in codegen -void CodeGen::genProduceReg(GenTree* tree) -{ - if (tree->gtFlags & GTF_SPILL) - { - if (genIsRegCandidateLocal(tree)) - { - // Store local variable to its home location. - tree->gtFlags &= ~GTF_REG_VAL; - inst_TT_RV(ins_Store(tree->gtType), tree, tree->gtRegNum); - } - else - { - tree->SetInReg(); - regSet.rsSpillTree(tree->gtRegNum, tree); - tree->gtFlags |= GTF_SPILLED; - tree->gtFlags &= ~GTF_SPILL; - gcInfo.gcMarkRegSetNpt(genRegMask(tree->gtRegNum)); - return; - } - } - - genUpdateLife(tree); - - // If we've produced a register, mark it as a pointer, as needed. - // Except in the case of a dead definition of a lclVar. - if (tree->gtHasReg() && (!tree->IsLocal() || (tree->gtFlags & GTF_VAR_DEATH) == 0)) - { - gcInfo.gcMarkRegPtrVal(tree->gtRegNum, tree->TypeGet()); - } - tree->SetInReg(); -} - -// transfer gc/byref status of src reg to dst reg -void CodeGen::genTransferRegGCState(regNumber dst, regNumber src) -{ - regMaskTP srcMask = genRegMask(src); - regMaskTP dstMask = genRegMask(dst); - - if (gcInfo.gcRegGCrefSetCur & srcMask) - { - gcInfo.gcMarkRegSetGCref(dstMask); - } - else if (gcInfo.gcRegByrefSetCur & srcMask) - { - gcInfo.gcMarkRegSetByref(dstMask); - } - else - { - gcInfo.gcMarkRegSetNpt(dstMask); - } + NYI("genRegCopy"); } // Produce code for a GT_CALL node @@ -2050,57 +1055,6 @@ void CodeGen::genEmitHelperCall(unsigned helper, NYI("Helper call"); } -/*****************************************************************************/ -#ifdef DEBUGGING_SUPPORT -/***************************************************************************** - * genSetScopeInfo - * - * Called for every scope info piece to record by the main genSetScopeInfo() - */ - -void CodeGen::genSetScopeInfo(unsigned which, - UNATIVE_OFFSET startOffs, - UNATIVE_OFFSET length, - unsigned varNum, - unsigned LVnum, - bool avail, - Compiler::siVarLoc& varLoc) -{ - /* We need to do some mapping while reporting back these variables */ - - unsigned ilVarNum = compiler->compMap2ILvarNum(varNum); - noway_assert((int)ilVarNum != ICorDebugInfo::UNKNOWN_ILNUM); - - VarName name = nullptr; - -#ifdef DEBUG - - for (unsigned scopeNum = 0; scopeNum < compiler->info.compVarScopesCount; scopeNum++) - { - if (LVnum == compiler->info.compVarScopes[scopeNum].vsdLVnum) - { - name = compiler->info.compVarScopes[scopeNum].vsdName; - } - } - - // Hang on to this compiler->info. - - TrnslLocalVarInfo& tlvi = genTrnslLocalVarInfo[which]; - - tlvi.tlviVarNum = ilVarNum; - tlvi.tlviLVnum = LVnum; - tlvi.tlviName = name; - tlvi.tlviStartPC = startOffs; - tlvi.tlviLength = length; - tlvi.tlviAvailable = avail; - tlvi.tlviVarLoc = varLoc; - -#endif // DEBUG - - compiler->eeSetLVinfo(which, startOffs, length, ilVarNum, LVnum, name, avail, varLoc); -} -#endif // DEBUGGING_SUPPORT - #endif // _TARGET_ARM_ #endif // !LEGACY_BACKEND |