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* [MIPS GlobalISel] Select sqrtPetar Avramovic2019-06-064-0/+216
| | | | | | | | Select G_FSQRT for MIPS32. Differential Revision: https://reviews.llvm.org/D62905 llvm-svn: 362692
* [MIPS GlobalISel] Select fabsPetar Avramovic2019-06-064-0/+216
| | | | | | | | Select G_FABS for MIPS32. Differential Revision: https://reviews.llvm.org/D62903 llvm-svn: 362690
* [MIPS GlobalISel] Select fpext and fptruncPetar Avramovic2019-06-064-0/+214
| | | | | | | | Select G_FPEXT and G_FPTRUNC for MIPS32. Differential Revision: https://reviews.llvm.org/D62902 llvm-svn: 362689
* [MIPS GlobalISel] Select floor and ceilPetar Avramovic2019-06-062-0/+226
| | | | | | | | Select G_FFLOOR and G_FCEIL for MIPS32. Differential Revision: https://reviews.llvm.org/D62901 llvm-svn: 362688
* [MIPS GlobalISel] Select fcmpPetar Avramovic2019-06-054-0/+1738
| | | | | | | | Select floating point compare for MIPS32. Differential Revision: https://reviews.llvm.org/D62721 llvm-svn: 362603
* [DAGCombine][X86][AArch64][MIPS][LANAI] (C - x) - y -> C - (x + y) fold ↵Roman Lebedev2019-06-042-13/+13
| | | | | | | | | | | | | | | | | | | | | | | | | | | (PR41952) Summary: This *might* be the last fold for `sink-addsub-of-const.ll`, but i'm not sure yet. As far as i can tell, there are no regressions here (ignoring x86-32), all changes are either good or neutral. This, almost surprisingly to me, fixes the motivational tests (in `shift-amount-mod.ll`) `@reg32_lshr_by_sub_from_negated` from [[ https://bugs.llvm.org/show_bug.cgi?id=41952 | PR41952 ]]. https://rise4fun.com/Alive/vMd3 Reviewers: RKSimon, t.p.northover, craig.topper, spatel, efriedma Reviewed By: RKSimon Subscribers: sdardis, javed.absar, arichardson, kristof.beyls, jrtc27, atanasyan, llvm-commits Tags: #llvm Differential Revision: https://reviews.llvm.org/D62774 llvm-svn: 362488
* [mips] Extend range of register indexes accepted by cfcmsa/ctcmsaSimon Atanasyan2019-06-011-0/+18
| | | | | | | | | | | | | | | | | The `cfcmsa` and `ctcmsa` instructions accept index of MSA control register. The MIPS64 SIMD Architecture define eight MSA control registers. But register index for `cfcmsa` and `ctcmsa` instructions might be any number in 0..31 range. If the index is greater then 7, `cfcmsa` writes zero to the destination registers and `ctcmsa` does nothing [1]. [1] MIPS Architecture for Programmers Volume IV-j: The MIPS64 SIMD Architecture Module https://www.mips.com/?do-download=the-mips64-simd-architecture-module Differential Revision: https://reviews.llvm.org/D62597 llvm-svn: 362299
* [MIPS GlobalISel] Add detailed tests for lower callPetar Avramovic2019-05-312-5/+298
| | | | | | | | | | | | | | | | Test different operand types of callee and their behavior whether relocation model is pic or not. Possible operand types are: Register (function pointer), External symbol (used for libcalls e.g. __udivdi3 or memcpy), Global address. Global address has different handling depending on relocation model and linkage type. Register and external symbol do not. Differential Revision: https://reviews.llvm.org/D62590 llvm-svn: 362212
* [MIPS GlobalISel] Handle position independent code Petar Avramovic2019-05-314-0/+372
| | | | | | | | | | | | | Handle position independent code for MIPS32. When callee is global address, lower call will emit callee as G_GLOBAL_VALUE and add target flag if needed. Support $gp in getRegBankFromRegClass(). Select G_GLOBAL_VALUE, specially handle case when there are target flags attached by lowerCall. Differential Revision: https://reviews.llvm.org/D62589 llvm-svn: 362210
* [MIPS GlobalISel] Lower call for callee that is registerPetar Avramovic2019-05-311-0/+20
| | | | | | | | | Lower call for callee that is register for MIPS32. Register should contain callee function address. Differential Revision: https://reviews.llvm.org/D62585 llvm-svn: 362204
* [mips] Use reg-exp in tests to tolerate register indexes changing. NFCSimon Atanasyan2019-05-294-752/+752
| | | | llvm-svn: 361966
* [CodeGen] Add lrint/llrint builtinsAdhemerval Zanella2019-05-282-0/+112
| | | | | | | | | | | | | | | | | This patch add the ISD::LRINT and ISD::LLRINT along with new intrinsics. The changes are straightforward as for other floating-point rounding functions, with just some adjustments required to handle the return value being an interger. The idea is to optimize lrint/llrint generation for AArch64 in a subsequent patch. Current semantic is just route it to libm symbol. Reviewed By: craig.topper Differential Revision: https://reviews.llvm.org/D62017 llvm-svn: 361875
* [NFC][MIPS] Autogenerater madd-msub.ll testRoman Lebedev2019-05-281-216/+435
| | | | | | Being affected by upcoming patch llvm-svn: 361860
* Revert r361356: "[MIR] Add simple PRE pass to MachineCSE"David L. Jones2019-05-271-1/+2
| | | | | | | | This is problematic on buildbots, as discussed here: https://reviews.llvm.org/rL361356 It seems like the plan already was to revert, but that hasn't happened yet. llvm-svn: 361746
* [mips] Always check that `shift and add` optimization is efficient.Simon Atanasyan2019-05-241-255/+56
| | | | | | | | | | | | | | The D45316 introduced the `shouldTransformMulToShiftsAddsSubs` function to check that breaking down constant multiplications into a series of shifts, adds, and subs is efficient. Unfortunately, this function does not check maximum number of steps on all paths of the algorithm. This patch fixes this bug. Fix for PR41929. Differential Revision: https://reviews.llvm.org/D62166 llvm-svn: 361606
* [NFC][Mips] Autogenerate msa/i5-s.ll testRoman Lebedev2019-05-231-28/+44
| | | | | | Being affected by (sub %x, C) -> add %X, (sub 0, C) 'for vectors' patch. llvm-svn: 361523
* [NFC][Mips] Autogenerate msa/arithmetic.ll testRoman Lebedev2019-05-231-366/+323
| | | | | | Being affected by (sub %x, C) -> add %X, (sub 0, C) 'for vectors' patch. llvm-svn: 361522
* [TargetLowering] Extend bool args to inline-asm according to getBooleanTypeKees Cook2019-05-221-0/+14
| | | | | | | | | | | | | | | | | Summary: This extends Krzysztof Parzyszek's X86-specific solution (https://reviews.llvm.org/D60208) to the generic code pointed out by James Y Knight. Reviewers: kparzysz, craig.topper, nickdesaulniers Subscribers: efriedma, sdardis, nemanjai, javed.absar, eraman, fedor.sergeev, asb, rbar, johnrusso, simoncook, apazos, sabuasal, niosHD, jrtc27, zzheng, edward-jones, atanasyan, rogfer01, MartinMosbeck, brucehoult, the_o, PkmX, jocewei, jsji, llvm-commits, srhines, void, nickdesaulniers, jyknight Tags: #llvm Differential Revision: https://reviews.llvm.org/D60224 llvm-svn: 361404
* [MIR] Add simple PRE pass to MachineCSEAnton Afanasyev2019-05-221-2/+1
| | | | | | | | | | | | | | | | | | | | | | | | This is the second part of the commit fixing PR38917 (hoisting partitially redundant machine instruction). Most of PRE (partitial redundancy elimination) and CSE work is done on LLVM IR, but some of redundancy arises during DAG legalization. Machine CSE is not enough to deal with it. This simple PRE implementation works a little bit intricately: it passes before CSE, looking for partitial redundancy and transforming it to fully redundancy, anticipating that the next CSE step will eliminate this created redundancy. If CSE doesn't eliminate this, than created instruction will remain dead and eliminated later by Remove Dead Machine Instructions pass. The third part of the commit is supposed to refactor MachineCSE, to make it more clear and to merge MachinePRE with MachineCSE, so one need no rely on further Remove Dead pass to clear instrs not eliminated by CSE. First step: https://reviews.llvm.org/D54839 Fixes llvm.org/PR38917 llvm-svn: 361356
* [CodeGen] Add lround/llround builtinsAdhemerval Zanella2019-05-162-0/+112
| | | | | | | | | | | | | This patch add the ISD::LROUND and ISD::LLROUND along with new intrinsics. The changes are straightforward as for other floating-point rounding functions, with just some adjustments required to handle the return value being an interger. The idea is to optimize lround/llround generation for AArch64 in a subsequent patch. Current semantic is just route it to libm symbol. llvm-svn: 360889
* RegAllocFast: Improve hinting heuristicMatt Arsenault2019-05-162-261/+260
| | | | | | | | | | | | | | | Trace through multiple COPYs when looking for a physreg source. Add hinting for vregs that will be copied into physregs (we only hinted for vregs getting copied to a physreg previously). Give hinted a register a bonus when deciding which value to spill. This is part of my rewrite regallocfast series. In fact this one doesn't even have an effect unless you also flip the allocation to happen from back to front of a basic block. Nonetheless it helps to split this up to ease review of D52010 Patch by Matthias Braun llvm-svn: 360887
* [IR] Disallow llvm.global_ctors and llvm.global_dtors of the 2-field form in ↵Fangrui Song2019-05-151-1/+1
| | | | | | | | | | | | | | | | | | | | textual format The 3-field form was introduced by D3499 in 2014 and the legacy 2-field form was planned to be removed in LLVM 4.0 For the textual format, this patch migrates the existing 2-field form to use the 3-field form and deletes the compatibility code. test/Verifier/global-ctors-2.ll checks we have a friendly error message. For bitcode, lib/IR/AutoUpgrade UpgradeGlobalVariables will upgrade the 2-field form (add i8* null as the third field). Reviewed By: rnk, dexonsmith Differential Revision: https://reviews.llvm.org/D61547 llvm-svn: 360742
* Reapply r359906, "RegAllocFast: Add heuristic to detect values not live-out ↵Matt Arsenault2019-05-034-80/+42
| | | | | | | | | | | of a block" This reverts commit r359912. This should pass now, since the clang test was made less fragile in r359918. llvm-svn: 359919
* Revert r359906, "RegAllocFast: Add heuristic to detect values not live-out ↵Nico Weber2019-05-034-42/+80
| | | | | | | | of a block" Makes clang/test/Misc/backend-stack-frame-diagnostics-fallback.cpp fail. llvm-svn: 359912
* RegAllocFast: Add heuristic to detect values not live-out of a blockMatt Arsenault2019-05-034-80/+42
| | | | | | | | | Add an improved/new heuristic to catch more cases when values are not live out of a basic block. Patch by Matthias Braun llvm-svn: 359906
* Revert "[MIR] Add simple PRE pass to MachineCSE"Anton Afanasyev2019-05-031-1/+2
| | | | | | | This reverts commit 9c20156de39b377190d7a91783d61877b303fe35. It breaks stage 2 of clang-ppc64be-linux-multistage. llvm-svn: 359875
* [MIR] Add simple PRE pass to MachineCSEAnton Afanasyev2019-05-031-2/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This is the second part of the commit fixing PR38917 (hoisting partitially redundant machine instruction). Most of PRE (partitial redundancy elimination) and CSE work is done on LLVM IR, but some of redundancy arises during DAG legalization. Machine CSE is not enough to deal with it. This simple PRE implementation works a little bit intricately: it passes before CSE, looking for partitial redundancy and transforming it to fully redundancy, anticipating that the next CSE step will eliminate this created redundancy. If CSE doesn't eliminate this, than created instruction will remain dead and eliminated later by Remove Dead Machine Instructions pass. The third part of the commit is supposed to refactor MachineCSE, to make it more clear and to merge MachinePRE with MachineCSE, so one need no rely on further Remove Dead pass to clear instrs not eliminated by CSE. First step: https://reviews.llvm.org/D54839 Fixes llvm.org/PR38917 Reviewers: RKSimon Subscribers: hfinkel, llvm-commits Tags: #llvm Differential Revision: https://reviews.llvm.org/D56772 llvm-svn: 359870
* [llvm-readobj] Change -long-option to --long-option in tests. NFCFangrui Song2019-05-013-6/+6
| | | | | | | | | | We use both -long-option and --long-option in tests. Switch to --long-option for consistency. In the "llvm-readelf" mode, -long-option is discouraged as it conflicts with grouped short options and it is not accepted by GNU readelf. While updating the tests, change llvm-readobj -s to llvm-readobj -S to reduce confusion ("s" is --section-headers in llvm-readobj but --symbols in llvm-readelf). llvm-svn: 359649
* [AsmPrinter] refactor to support %c w/ GlobalAddress'Nick Desaulniers2019-04-261-0/+26
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Summary: Targets like ARM, MSP430, PPC, and SystemZ have complex behavior when printing the address of a MachineOperand::MO_GlobalAddress. Move that handling into a new overriden method in each base class. A virtual method was added to the base class for handling the generic case. Refactors a few subclasses to support the target independent %a, %c, and %n. The patch also contains small cleanups for AVRAsmPrinter and SystemZAsmPrinter. It seems that NVPTXTargetLowering is possibly missing some logic to transform GlobalAddressSDNodes for TargetLowering::LowerAsmOperandForConstraint to handle with "i" extended inline assembly asm constraints. Fixes: - https://bugs.llvm.org/show_bug.cgi?id=41402 - https://github.com/ClangBuiltLinux/linux/issues/449 Reviewers: echristo, void Reviewed By: void Subscribers: void, craig.topper, jholewinski, dschuff, jyknight, dylanmckay, sdardis, nemanjai, javed.absar, sbc100, jgravelle-google, eraman, kristof.beyls, hiraditya, aheejin, kbarton, fedor.sergeev, jrtc27, atanasyan, jsji, llvm-commits, kees, tpimh, nathanchance, peter.smith, srhines Tags: #llvm Differential Revision: https://reviews.llvm.org/D60887 llvm-svn: 359337
* [MIPS] Use custom bitcast lowering to avoid excessive instructionsSimon Atanasyan2019-04-251-5/+5
| | | | | | | | | | | | | On Mips32r2 bitcast can be expanded to two sw instructions and an ldc1 when using bitcast i64 to double or an sdc1 and two lw instructions when using bitcast double to i64. By introducing custom lowering that uses mtc1/mthc1 we can avoid excessive instructions. Patch by Mirko Brkusanin. Differential Revision: https://reviews.llvm.org/D61069 llvm-svn: 359171
* [GlobalISel] Enable CSE in the IRTranslator & legalizer for -O0 with ↵Amara Emerson2019-04-158-153/+105
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | constants only. Other opcodes shouldn't be CSE'd until we can be sure debug info quality won't be degraded. This change also improves the IRTranslator so that in most places, but not all, it creates constants using the MIRBuilder directly instead of first creating a new destination vreg and then creating a constant. By doing this, the buildConstant() method can just return the vreg of an existing G_CONSTANT instead of having to create a COPY from it. I measured a 0.2% improvement in compile time and a 0.9% improvement in code size at -O0 ARM64. Compile time: Program base cse diff test-suite...ark/tramp3d-v4/tramp3d-v4.test 9.04 9.12 0.8% test-suite...Mark/mafft/pairlocalalign.test 2.68 2.66 -0.7% test-suite...-typeset/consumer-typeset.test 5.53 5.51 -0.4% test-suite :: CTMark/lencod/lencod.test 5.30 5.28 -0.3% test-suite :: CTMark/Bullet/bullet.test 25.82 25.76 -0.2% test-suite...:: CTMark/ClamAV/clamscan.test 6.92 6.90 -0.2% test-suite...TMark/7zip/7zip-benchmark.test 34.24 34.17 -0.2% test-suite :: CTMark/SPASS/SPASS.test 6.25 6.24 -0.1% test-suite...:: CTMark/sqlite3/sqlite3.test 1.66 1.66 -0.1% test-suite :: CTMark/kimwitu++/kc.test 13.61 13.60 -0.0% Geomean difference -0.2% Code size: Program base cse diff test-suite...-typeset/consumer-typeset.test 1315632 1266480 -3.7% test-suite...:: CTMark/ClamAV/clamscan.test 1313892 1297508 -1.2% test-suite :: CTMark/lencod/lencod.test 1439504 1423112 -1.1% test-suite...TMark/7zip/7zip-benchmark.test 2936980 2904172 -1.1% test-suite :: CTMark/Bullet/bullet.test 3478276 3445460 -0.9% test-suite...ark/tramp3d-v4/tramp3d-v4.test 8082868 8033492 -0.6% test-suite :: CTMark/kimwitu++/kc.test 3870380 3853972 -0.4% test-suite :: CTMark/SPASS/SPASS.test 1434904 1434896 -0.0% test-suite...Mark/mafft/pairlocalalign.test 764528 764528 0.0% test-suite...:: CTMark/sqlite3/sqlite3.test 782092 782092 0.0% Geomean difference -0.9% Differential Revision: https://reviews.llvm.org/D60580 llvm-svn: 358369
* [MIPS GlobalISel] Select floating point arithmetic operationsPetar Avramovic2019-04-034-0/+858
| | | | | | | | Select 32 and 64 bit floating point add, sub, mul and div for MIPS32. Differential Revision: https://reviews.llvm.org/D60191 llvm-svn: 357584
* [mips] Use AltOrders to prevent using odd FP-registersSimon Atanasyan2019-04-021-4/+4
| | | | | | | | | | | | | | | | | | | | | | | | | To disable using of odd floating-point registers (O32 ABI and -mno-odd-spreg command line option) such registers and their super-registers added to the set of reserved registers. In general, it works. But there is at least one problem - in case of enabled machine verifier pass some floating-point tests failed because live ranges of register units that are reserved is not empty and verification pass failed with "Live segment doesn't end at a valid instruction" error message. There is D35985 patch which tries to solve the problem by explicit removing of register units. This solution did not get approval. I would like to use another approach for prevent using odd floating point registers - define `AltOrders` and `AltOrderSelect` for MIPS floating point register classes. Such `AltOrders` contains reduced set of registers. At first glance, such solution does not break any test cases and allows enabling machine instruction verification for all MIPS test cases. Differential Revision: http://reviews.llvm.org/D59799 llvm-svn: 357472
* [MIPS] Remove fcmp undef from reduced testSimon Pilgrim2019-03-301-7/+7
| | | | | | | | Pre-commit for D60006 (Add fcmp UNDEF handling to SelectionDAG::FoldSetCC) Approved by @atanasyan (Simon Atanasyan) llvm-svn: 357354
* [MIPS] Regenerate double constant comparison testSimon Pilgrim2019-03-291-10/+45
| | | | | | Prep work for PR40800 (Add UNDEF handling to SelectionDAG::FoldSetCC) llvm-svn: 357294
* [mips] Fix lowering a signed immediate for *.d MSA instructionsSimon Atanasyan2019-03-293-100/+271
| | | | | | | | | | | | | | | The `lowerMSASplatImm` function zero-extends `i32` immediates while building constant. If target type is `i64`, negative immediate loses the sign. As a result, for example `__builtin_msa_ldi_d(-1)` lowered to series of instruction loads incorrect value 0xffffffff to the `$w0` register instead of single `ldi.d $w0, -1` instruction. The fix zero-extends unsigned immediates and signed-extend signed immediates. Differential Revision: http://reviews.llvm.org/D59884 llvm-svn: 357264
* [MIPS GlobalISel] Select float constantsPetar Avramovic2019-03-284-0/+204
| | | | | | | | Select 32 and 64 bit float constants for MIPS32. Differential Revision: https://reviews.llvm.org/D59933 llvm-svn: 357183
* Revert r356996 "[DAG] Avoid smart constructor-based dangling nodes."Nirav Dave2019-03-271-12/+12
| | | | | | | This patch appears to trigger very large compile time increases in halide builds. llvm-svn: 357116
* [GlobalISel] Fix legalizer artifact combiner from crashing with invalid dead ↵Amara Emerson2019-03-271-2/+0
| | | | | | | | | | | | | | | | | | | | instructions. The artifact combiners push instructions which have been marked for deletion onto an list for the legalizer to deal with on return. However, for trunc(ext) combines the combiner routine recursively calls itself. When it does this the dead instructions list may not be empty, and the other combiners don't expect to be dealing with essentially invalid MIR (multiple vreg defs etc). This change fixes it by ensuring that the dead instructions are processed on entry into tryCombineInstruction. As a result, this fix exposed a few places in tests where G_TRUNC instructions were not being deleted even though they were dead. Differential Revision: https://reviews.llvm.org/D59892 llvm-svn: 357101
* [DAG] Avoid smart constructor-based dangling nodes.Nirav Dave2019-03-261-12/+12
| | | | | | | | | | | | | | | Various SelectionDAG non-combine operations (e.g. the getNode smart constructor and legalization) may leave dangling nodes by applying optimizations or not fully pruning unused result values. This can result in nodes that are never added to the worklist and therefore can not be pruned. Add a node inserter as the current node deleter to make sure such nodes have the chance of being pruned. Many minor changes, mostly positive. llvm-svn: 356996
* [MIPS GlobalISel] Select copy for arguments from FPRBRegBankPetar Avramovic2019-03-252-0/+450
| | | | | | | | | Move selectCopy into MipsInstructionSelector class. Select copy for arguments from FPRBRegBank for MIPS32. Differential Revision: https://reviews.llvm.org/D59644 llvm-svn: 356886
* [MIPS GlobalISel] Add floating point register bankPetar Avramovic2019-03-251-0/+296
| | | | | | | | | Add floating point register bank for MIPS32. Implement getRegBankFromRegClass for float register classes. Differential Revision: https://reviews.llvm.org/D59643 llvm-svn: 356883
* [MIPS GlobalISel] Lower float and double arguments in registersPetar Avramovic2019-03-251-0/+211
| | | | | | | | | | Lower float and double arguments in registers for MIPS32. When float/double argument is passed through gpr registers select appropriate move instruction. Differential Revision: https://reviews.llvm.org/D59642 llvm-svn: 356882
* Mips: Don't create copy of nothingMatt Arsenault2019-03-213-117/+86
| | | | | | | | | This was creating a copy of the register the pseudo itself was def'ing, leaving a copy of an undefined register. I'm not sure how the verifier is not catching this, but this avoids asserting in a future change to RegAllocFast llvm-svn: 356716
* RegAllocFast: Remove early selection loop, the spill calculation will report ↵Matt Arsenault2019-03-1913-875/+874
| | | | | | | | | | | | | | | | cost 0 anyway for free regs The 2nd loop calculates spill costs but reports free registers as cost 0 anyway, so there is little benefit from having a separate early loop. Surprisingly this is not NFC, as many register are marked regDisabled so the first loop often picks up later registers unnecessarily instead of the first one available in the allocation order... Patch by Matthias Braun llvm-svn: 356499
* [MIPS][microMIPS] Enable dynamic stack realignmentSimon Atanasyan2019-03-191-13/+29
| | | | | | | | | | | | Dynamic stack realignment was disabled on micromips by checking if target has standard encoding. We simply change the condition to skip Mips16 only. Patch by Mirko Brkusanin. Differential Revision: http://reviews.llvm.org/D59499 llvm-svn: 356478
* [MIPS GlobalISel] Improve selection of constantsPetar Avramovic2019-03-1520-184/+213
| | | | | | | | | Certain 32 bit constants can be generated with a single instruction instead of two. Implement materialize32BitImm function for MIPS32. Differential Revision: https://reviews.llvm.org/D59369 llvm-svn: 356238
* [GlobalISel][Utils] Add a getConstantVRegVal variant that looks through instrsQuentin Colombet2019-03-141-7/+5
| | | | | | | | | | | | | | | | | | | getConstantVRegVal used to only look for G_CONSTANT when looking at unboxing the value of a vreg. However, constants are sometimes not directly used and are hidden behind trunc, s|zext or copy chain of computation. In particular this may be introduced by the legalization process that doesn't want to simplify these patterns because it can lead to infine loop when legalizing a constant. To circumvent that problem, add a new variant of getConstantVRegVal, named getConstantVRegValWithLookThrough, that allow to look through extensions. Differential Revision: https://reviews.llvm.org/D59227 llvm-svn: 356116
* Fixup tests to check for any MCInst number instead of a specific one.Douglas Yung2019-03-142-110/+110
| | | | llvm-svn: 356115
* Mips: Add ImmArg to intrinsicsMatt Arsenault2019-03-131-135/+0
| | | | | | | | | | | | | | | I found these by asserting in clang for any GCCBuiltin that doesn't require mangling and requires a constant for the builtin. This means that intrinsics are missing which don't use GCCBuiltin, don't have builtins defined in clang, or were missing the constant annotation in the builtin definition. I'm not sure what's going on with the immediates.ll test. It seems to be intended to test invalid cases like this, but then tries to handle some of them anyway. I've moved the cases that were inconsistent with the GCCBuiltin definition so they don't test the codegen anymore. llvm-svn: 356085
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