[llvm] r354697 - [WebAssembly] Remove unneeded MCSymbolRefExpr variants
Sam Clegg via llvm-commits
llvm-commits at lists.llvm.org
Fri Feb 22 16:15:40 PST 2019
Should be fixed in rL354705
On Fri, Feb 22, 2019 at 4:01 PM Richard Trieu <rtrieu at google.com> wrote:
>
> Hi Sam,
>
> I think your change is causing some WebAssembly tests to start failing.
>
> Failing Tests (36):
> LLVM :: CodeGen/WebAssembly/byval.ll
> LLVM :: CodeGen/WebAssembly/call.ll
> LLVM :: CodeGen/WebAssembly/cfg-stackify-eh.ll
> LLVM :: CodeGen/WebAssembly/cfg-stackify.ll
> LLVM :: CodeGen/WebAssembly/exception.ll
> LLVM :: CodeGen/WebAssembly/f16.ll
> LLVM :: CodeGen/WebAssembly/f32.ll
> LLVM :: CodeGen/WebAssembly/f64.ll
> LLVM :: CodeGen/WebAssembly/fast-isel-noreg.ll
> LLVM :: CodeGen/WebAssembly/frem.ll
> LLVM :: CodeGen/WebAssembly/function-bitcasts-varargs.ll
> LLVM :: CodeGen/WebAssembly/function-bitcasts.ll
> LLVM :: CodeGen/WebAssembly/global.ll
> LLVM :: CodeGen/WebAssembly/i128.ll
> LLVM :: CodeGen/WebAssembly/indirect-import.ll
> LLVM :: CodeGen/WebAssembly/libcalls.ll
> LLVM :: CodeGen/WebAssembly/lower-em-ehsjlj-options.ll
> LLVM :: CodeGen/WebAssembly/lower-global-dtors.ll
> LLVM :: CodeGen/WebAssembly/main-declaration.ll
> LLVM :: CodeGen/WebAssembly/main-no-args.ll
> LLVM :: CodeGen/WebAssembly/mem-intrinsics.ll
> LLVM :: CodeGen/WebAssembly/muloti4.ll
> LLVM :: CodeGen/WebAssembly/reg-stackify.ll
> LLVM :: CodeGen/WebAssembly/returned.ll
> LLVM :: CodeGen/WebAssembly/signext-arg.ll
> LLVM :: CodeGen/WebAssembly/signext-zeroext.ll
> LLVM :: CodeGen/WebAssembly/simd.ll
> LLVM :: CodeGen/WebAssembly/stack-alignment.ll
> LLVM :: CodeGen/WebAssembly/switch.ll
> LLVM :: CodeGen/WebAssembly/umulo-128-legalisation-lowering.ll
> LLVM :: CodeGen/WebAssembly/umulo-i64.ll
> LLVM :: CodeGen/WebAssembly/unreachable.ll
> LLVM :: CodeGen/WebAssembly/unsupported-function-bitcasts.ll
> LLVM :: CodeGen/WebAssembly/unused-argument.ll
> LLVM :: CodeGen/WebAssembly/userstack.ll
> LLVM :: CodeGen/WebAssembly/varargs.ll
>
> Expected Passes : 29131
> Expected Failures : 149
> Unsupported Tests : 628
> Unexpected Failures: 36
>
> Sample failure:
> Output from test CodeGen/WebAssembly/cfg-stackify.ll
> Command Output (stderr):
> --
> /llvm/test/CodeGen/WebAssembly/cfg-stackify.ll:1289:13: error: OPT-NEXT: expected string not found in input
> ; OPT-NEXT: call test15_callee1 at FUNCTION{{$}}
> ^
> <stdin>:813:2: note: scanning from here
> call test15_callee1
> ^
>
> It looks like the expected strings in the test just need to updated in these tests.
>
> Richard
>
> On Fri, Feb 22, 2019 at 2:28 PM Sam Clegg via llvm-commits <llvm-commits at lists.llvm.org> wrote:
>>
>> Author: sbc
>> Date: Fri Feb 22 14:29:34 2019
>> New Revision: 354697
>>
>> URL: http://llvm.org/viewvc/llvm-project?rev=354697&view=rev
>> Log:
>> [WebAssembly] Remove unneeded MCSymbolRefExpr variants
>>
>> We record the type of the symbol (event/function/data/global) in the
>> MCWasmSymbol and so it should always be clear how to handle a relocation
>> based on the symbol itself.
>>
>> The exception is a function which still needs the special @TYPEINDEX
>> then the relocation contains the signature rather than the address
>> of the functions.
>>
>> Differential Revision: https://reviews.llvm.org/D58472
>>
>> Modified:
>> llvm/trunk/include/llvm/MC/MCExpr.h
>> llvm/trunk/lib/MC/MCExpr.cpp
>> llvm/trunk/lib/MC/WasmObjectWriter.cpp
>> llvm/trunk/lib/Target/WebAssembly/MCTargetDesc/WebAssemblyWasmObjectWriter.cpp
>> llvm/trunk/lib/Target/WebAssembly/WebAssemblyAsmPrinter.cpp
>> llvm/trunk/lib/Target/WebAssembly/WebAssemblyAsmPrinter.h
>> llvm/trunk/lib/Target/WebAssembly/WebAssemblyMCInstLower.cpp
>> llvm/trunk/test/MC/WebAssembly/annotations.s
>> llvm/trunk/test/MC/WebAssembly/assembler-binary.ll
>> llvm/trunk/test/MC/WebAssembly/basic-assembly.s
>>
>> Modified: llvm/trunk/include/llvm/MC/MCExpr.h
>> URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/include/llvm/MC/MCExpr.h?rev=354697&r1=354696&r2=354697&view=diff
>> ==============================================================================
>> --- llvm/trunk/include/llvm/MC/MCExpr.h (original)
>> +++ llvm/trunk/include/llvm/MC/MCExpr.h Fri Feb 22 14:29:34 2019
>> @@ -284,10 +284,7 @@ public:
>> VK_Hexagon_IE,
>> VK_Hexagon_IE_GOT,
>>
>> - VK_WebAssembly_FUNCTION, // Function table index, rather than virtual addr
>> - VK_WebAssembly_GLOBAL, // Global object index
>> - VK_WebAssembly_TYPEINDEX,// Type table index
>> - VK_WebAssembly_EVENT, // Event index
>> + VK_WebAssembly_TYPEINDEX,// Reference to a symbol's type (signature)
>>
>> VK_AMDGPU_GOTPCREL32_LO, // symbol at gotpcrel32@lo
>> VK_AMDGPU_GOTPCREL32_HI, // symbol at gotpcrel32@hi
>>
>> Modified: llvm/trunk/lib/MC/MCExpr.cpp
>> URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/MC/MCExpr.cpp?rev=354697&r1=354696&r2=354697&view=diff
>> ==============================================================================
>> --- llvm/trunk/lib/MC/MCExpr.cpp (original)
>> +++ llvm/trunk/lib/MC/MCExpr.cpp Fri Feb 22 14:29:34 2019
>> @@ -302,10 +302,7 @@ StringRef MCSymbolRefExpr::getVariantKin
>> case VK_Hexagon_LD_PLT: return "LDPLT";
>> case VK_Hexagon_IE: return "IE";
>> case VK_Hexagon_IE_GOT: return "IEGOT";
>> - case VK_WebAssembly_FUNCTION: return "FUNCTION";
>> - case VK_WebAssembly_GLOBAL: return "GLOBAL";
>> case VK_WebAssembly_TYPEINDEX: return "TYPEINDEX";
>> - case VK_WebAssembly_EVENT: return "EVENT";
>> case VK_AMDGPU_GOTPCREL32_LO: return "gotpcrel32 at lo";
>> case VK_AMDGPU_GOTPCREL32_HI: return "gotpcrel32 at hi";
>> case VK_AMDGPU_REL32_LO: return "rel32 at lo";
>> @@ -418,10 +415,7 @@ MCSymbolRefExpr::getVariantKindForName(S
>> .Case("lo8", VK_AVR_LO8)
>> .Case("hi8", VK_AVR_HI8)
>> .Case("hlo8", VK_AVR_HLO8)
>> - .Case("function", VK_WebAssembly_FUNCTION)
>> - .Case("global", VK_WebAssembly_GLOBAL)
>> .Case("typeindex", VK_WebAssembly_TYPEINDEX)
>> - .Case("event", VK_WebAssembly_EVENT)
>> .Case("gotpcrel32 at lo", VK_AMDGPU_GOTPCREL32_LO)
>> .Case("gotpcrel32 at hi", VK_AMDGPU_GOTPCREL32_HI)
>> .Case("rel32 at lo", VK_AMDGPU_REL32_LO)
>>
>> Modified: llvm/trunk/lib/MC/WasmObjectWriter.cpp
>> URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/MC/WasmObjectWriter.cpp?rev=354697&r1=354696&r2=354697&view=diff
>> ==============================================================================
>> --- llvm/trunk/lib/MC/WasmObjectWriter.cpp (original)
>> +++ llvm/trunk/lib/MC/WasmObjectWriter.cpp Fri Feb 22 14:29:34 2019
>> @@ -1557,15 +1557,16 @@ uint64_t WasmObjectWriter::writeObject(M
>> assert(Fixup.getKind() ==
>> MCFixup::getKindForSize(is64Bit() ? 8 : 4, false));
>> const MCExpr *Expr = Fixup.getValue();
>> - auto *Sym = dyn_cast<MCSymbolRefExpr>(Expr);
>> - if (!Sym)
>> + auto *SymRef = dyn_cast<MCSymbolRefExpr>(Expr);
>> + if (!SymRef)
>> report_fatal_error("fixups in .init_array should be symbol references");
>> - if (Sym->getKind() != MCSymbolRefExpr::VK_WebAssembly_FUNCTION)
>> - report_fatal_error("symbols in .init_array should be for functions");
>> - if (Sym->getSymbol().getIndex() == InvalidIndex)
>> + const auto &TargetSym = cast<const MCSymbolWasm>(SymRef->getSymbol());
>> + if (TargetSym.getIndex() == InvalidIndex)
>> report_fatal_error("symbols in .init_array should exist in symbtab");
>> + if (!TargetSym.isFunction())
>> + report_fatal_error("symbols in .init_array should be for functions");
>> InitFuncs.push_back(
>> - std::make_pair(Priority, Sym->getSymbol().getIndex()));
>> + std::make_pair(Priority, TargetSym.getIndex()));
>> }
>> }
>>
>>
>> Modified: llvm/trunk/lib/Target/WebAssembly/MCTargetDesc/WebAssemblyWasmObjectWriter.cpp
>> URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/Target/WebAssembly/MCTargetDesc/WebAssemblyWasmObjectWriter.cpp?rev=354697&r1=354696&r2=354697&view=diff
>> ==============================================================================
>> --- llvm/trunk/lib/Target/WebAssembly/MCTargetDesc/WebAssemblyWasmObjectWriter.cpp (original)
>> +++ llvm/trunk/lib/Target/WebAssembly/MCTargetDesc/WebAssemblyWasmObjectWriter.cpp Fri Feb 22 14:29:34 2019
>> @@ -42,23 +42,8 @@ private:
>> WebAssemblyWasmObjectWriter::WebAssemblyWasmObjectWriter(bool Is64Bit)
>> : MCWasmObjectTargetWriter(Is64Bit) {}
>>
>> -// Test whether the given expression computes a function address.
>> -static bool isFunctionExpr(const MCExpr *Expr) {
>> - if (auto SyExp = dyn_cast<MCSymbolRefExpr>(Expr))
>> - return cast<MCSymbolWasm>(SyExp->getSymbol()).isFunction();
>> -
>> - if (auto BinOp = dyn_cast<MCBinaryExpr>(Expr))
>> - return isFunctionExpr(BinOp->getLHS()) != isFunctionExpr(BinOp->getRHS());
>> -
>> - if (auto UnOp = dyn_cast<MCUnaryExpr>(Expr))
>> - return isFunctionExpr(UnOp->getSubExpr());
>> -
>> - return false;
>> -}
>> -
>> -static bool isFunctionType(const MCValue &Target) {
>> - const MCSymbolRefExpr *RefA = Target.getSymA();
>> - return RefA && RefA->getKind() == MCSymbolRefExpr::VK_WebAssembly_TYPEINDEX;
>> +static bool isFunctionSignatureRef(const MCSymbolRefExpr *Ref) {
>> + return Ref->getKind() == MCSymbolRefExpr::VK_WebAssembly_TYPEINDEX;
>> }
>>
>> static const MCSection *getFixupSection(const MCExpr *Expr) {
>> @@ -80,41 +65,33 @@ static const MCSection *getFixupSection(
>> return nullptr;
>> }
>>
>> -static bool isGlobalType(const MCValue &Target) {
>> - const MCSymbolRefExpr *RefA = Target.getSymA();
>> - return RefA && RefA->getKind() == MCSymbolRefExpr::VK_WebAssembly_GLOBAL;
>> -}
>> -
>> -static bool isEventType(const MCValue &Target) {
>> - const MCSymbolRefExpr *RefA = Target.getSymA();
>> - return RefA && RefA->getKind() == MCSymbolRefExpr::VK_WebAssembly_EVENT;
>> -}
>> -
>> unsigned WebAssemblyWasmObjectWriter::getRelocType(const MCValue &Target,
>> const MCFixup &Fixup) const {
>> - // WebAssembly functions are not allocated in the data address space. To
>> - // resolve a pointer to a function, we must use a special relocation type.
>> - bool IsFunction = isFunctionExpr(Fixup.getValue());
>> + const MCSymbolRefExpr *RefA = Target.getSymA();
>> + assert(RefA);
>> + auto& SymA = cast<MCSymbolWasm>(RefA->getSymbol());
>>
>> switch (unsigned(Fixup.getKind())) {
>> case WebAssembly::fixup_code_sleb128_i32:
>> - if (IsFunction)
>> + if (SymA.isFunction())
>> return wasm::R_WASM_TABLE_INDEX_SLEB;
>> return wasm::R_WASM_MEMORY_ADDR_SLEB;
>> case WebAssembly::fixup_code_sleb128_i64:
>> llvm_unreachable("fixup_sleb128_i64 not implemented yet");
>> case WebAssembly::fixup_code_uleb128_i32:
>> - if (isGlobalType(Target))
>> + if (SymA.isFunction()) {
>> + if (isFunctionSignatureRef(RefA))
>> + return wasm::R_WASM_TYPE_INDEX_LEB;
>> + else
>> + return wasm::R_WASM_FUNCTION_INDEX_LEB;
>> + }
>> + if (SymA.isGlobal())
>> return wasm::R_WASM_GLOBAL_INDEX_LEB;
>> - if (isFunctionType(Target))
>> - return wasm::R_WASM_TYPE_INDEX_LEB;
>> - if (IsFunction)
>> - return wasm::R_WASM_FUNCTION_INDEX_LEB;
>> - if (isEventType(Target))
>> + if (SymA.isEvent())
>> return wasm::R_WASM_EVENT_INDEX_LEB;
>> return wasm::R_WASM_MEMORY_ADDR_LEB;
>> case FK_Data_4:
>> - if (IsFunction)
>> + if (SymA.isFunction())
>> return wasm::R_WASM_TABLE_INDEX_I32;
>> if (auto Section = static_cast<const MCSectionWasm *>(
>> getFixupSection(Fixup.getValue()))) {
>>
>> Modified: llvm/trunk/lib/Target/WebAssembly/WebAssemblyAsmPrinter.cpp
>> URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/Target/WebAssembly/WebAssemblyAsmPrinter.cpp?rev=354697&r1=354696&r2=354697&view=diff
>> ==============================================================================
>> --- llvm/trunk/lib/Target/WebAssembly/WebAssemblyAsmPrinter.cpp (original)
>> +++ llvm/trunk/lib/Target/WebAssembly/WebAssemblyAsmPrinter.cpp Fri Feb 22 14:29:34 2019
>> @@ -332,15 +332,6 @@ void WebAssemblyAsmPrinter::EmitInstruct
>> }
>> }
>>
>> -const MCExpr *WebAssemblyAsmPrinter::lowerConstant(const Constant *CV) {
>> - if (const auto *GV = dyn_cast<GlobalValue>(CV))
>> - if (GV->getValueType()->isFunctionTy()) {
>> - return MCSymbolRefExpr::create(
>> - getSymbol(GV), MCSymbolRefExpr::VK_WebAssembly_FUNCTION, OutContext);
>> - }
>> - return AsmPrinter::lowerConstant(CV);
>> -}
>> -
>> bool WebAssemblyAsmPrinter::PrintAsmOperand(const MachineInstr *MI,
>> unsigned OpNo, unsigned AsmVariant,
>> const char *ExtraCode,
>>
>> Modified: llvm/trunk/lib/Target/WebAssembly/WebAssemblyAsmPrinter.h
>> URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/Target/WebAssembly/WebAssemblyAsmPrinter.h?rev=354697&r1=354696&r2=354697&view=diff
>> ==============================================================================
>> --- llvm/trunk/lib/Target/WebAssembly/WebAssemblyAsmPrinter.h (original)
>> +++ llvm/trunk/lib/Target/WebAssembly/WebAssemblyAsmPrinter.h Fri Feb 22 14:29:34 2019
>> @@ -63,7 +63,6 @@ public:
>> void EmitConstantPool() override;
>> void EmitFunctionBodyStart() override;
>> void EmitInstruction(const MachineInstr *MI) override;
>> - const MCExpr *lowerConstant(const Constant *CV) override;
>> bool PrintAsmOperand(const MachineInstr *MI, unsigned OpNo,
>> unsigned AsmVariant, const char *ExtraCode,
>> raw_ostream &OS) override;
>>
>> Modified: llvm/trunk/lib/Target/WebAssembly/WebAssemblyMCInstLower.cpp
>> URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/Target/WebAssembly/WebAssemblyMCInstLower.cpp?rev=354697&r1=354696&r2=354697&view=diff
>> ==============================================================================
>> --- llvm/trunk/lib/Target/WebAssembly/WebAssemblyMCInstLower.cpp (original)
>> +++ llvm/trunk/lib/Target/WebAssembly/WebAssemblyMCInstLower.cpp Fri Feb 22 14:29:34 2019
>> @@ -122,13 +122,8 @@ MCOperand WebAssemblyMCInstLower::lowerS
>> int64_t Offset,
>> bool IsFunc, bool IsGlob,
>> bool IsEvent) const {
>> - MCSymbolRefExpr::VariantKind VK =
>> - IsFunc ? MCSymbolRefExpr::VK_WebAssembly_FUNCTION
>> - : IsGlob ? MCSymbolRefExpr::VK_WebAssembly_GLOBAL
>> - : IsEvent ? MCSymbolRefExpr::VK_WebAssembly_EVENT
>> - : MCSymbolRefExpr::VK_None;
>> -
>> - const MCExpr *Expr = MCSymbolRefExpr::create(Sym, VK, Ctx);
>> + const MCExpr *Expr =
>> + MCSymbolRefExpr::create(Sym, MCSymbolRefExpr::VK_None, Ctx);
>>
>> if (Offset != 0) {
>> if (IsFunc)
>>
>> Modified: llvm/trunk/test/MC/WebAssembly/annotations.s
>> URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/test/MC/WebAssembly/annotations.s?rev=354697&r1=354696&r2=354697&view=diff
>> ==============================================================================
>> --- llvm/trunk/test/MC/WebAssembly/annotations.s (original)
>> +++ llvm/trunk/test/MC/WebAssembly/annotations.s Fri Feb 22 14:29:34 2019
>> @@ -28,7 +28,7 @@ test_annotation:
>> local.set 0
>> block i32
>> local.get 0
>> - br_on_exn 0, __cpp_exception at EVENT
>> + br_on_exn 0, __cpp_exception
>> rethrow
>> end_block
>> end_try
>> @@ -59,7 +59,7 @@ test_annotation:
>> # CHECK-NEXT: local.set 0
>> # CHECK-NEXT: block i32
>> # CHECK-NEXT: local.get 0
>> -# CHECK-NEXT: br_on_exn 0, __cpp_exception at EVENT # 0: down to label6
>> +# CHECK-NEXT: br_on_exn 0, __cpp_exception # 0: down to label6
>> # CHECK-NEXT: rethrow # to caller
>> # CHECK-NEXT: end_block # label6:
>> # CHECK-NEXT: end_try # label5:
>>
>> Modified: llvm/trunk/test/MC/WebAssembly/assembler-binary.ll
>> URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/test/MC/WebAssembly/assembler-binary.ll?rev=354697&r1=354696&r2=354697&view=diff
>> ==============================================================================
>> --- llvm/trunk/test/MC/WebAssembly/assembler-binary.ll (original)
>> +++ llvm/trunk/test/MC/WebAssembly/assembler-binary.ll Fri Feb 22 14:29:34 2019
>> @@ -26,7 +26,7 @@ entry:
>> ; ASM: .globl foo
>> ; ASM: foo:
>> ; ASM-NEXT: .functype foo (i32) -> ()
>> -; ASM-NEXT: call bar at FUNCTION
>> +; ASM-NEXT: call bar
>> ; ASM-NEXT: end_function
>> ; ASM: .functype bar () -> ()
>>
>>
>> Modified: llvm/trunk/test/MC/WebAssembly/basic-assembly.s
>> URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/test/MC/WebAssembly/basic-assembly.s?rev=354697&r1=354696&r2=354697&view=diff
>> ==============================================================================
>> --- llvm/trunk/test/MC/WebAssembly/basic-assembly.s (original)
>> +++ llvm/trunk/test/MC/WebAssembly/basic-assembly.s Fri Feb 22 14:29:34 2019
>> @@ -26,9 +26,9 @@ test0:
>> br_if 0 # 0: down to label0
>> .LBB0_1:
>> loop i32 # label1:
>> - call something1 at FUNCTION
>> + call something1
>> i64.const 1234
>> - i32.call something2 at FUNCTION
>> + i32.call something2
>> i32.const 0
>> call_indirect 0
>> i32.const 1
>> @@ -72,7 +72,7 @@ test0:
>> local.set 0
>> block i32
>> local.get 0
>> - br_on_exn 0, __cpp_exception at EVENT
>> + br_on_exn 0, __cpp_exception
>> rethrow
>> .LBB0_4:
>> end_block
>> @@ -81,7 +81,7 @@ test0:
>> throw 0
>> .LBB0_5:
>> #i32.trunc_sat_f32_s
>> - global.get __stack_pointer at GLOBAL
>> + global.get __stack_pointer
>> end_function
>> .globaltype __stack_pointer, i32
>>
>> @@ -105,9 +105,9 @@ test0:
>> # CHECK-NEXT: br_if 0 # 0: down to label0
>> # CHECK-NEXT: .LBB0_1:
>> # CHECK-NEXT: loop i32 # label1:
>> -# CHECK-NEXT: call something1 at FUNCTION
>> +# CHECK-NEXT: call something1
>> # CHECK-NEXT: i64.const 1234
>> -# CHECK-NEXT: i32.call something2 at FUNCTION
>> +# CHECK-NEXT: i32.call something2
>> # CHECK-NEXT: i32.const 0
>> # CHECK-NEXT: call_indirect 0
>> # CHECK-NEXT: i32.const 1
>> @@ -149,7 +149,7 @@ test0:
>> # CHECK-NEXT: local.set 0
>> # CHECK-NEXT: block i32
>> # CHECK-NEXT: local.get 0
>> -# CHECK-NEXT: br_on_exn 0, __cpp_exception at EVENT
>> +# CHECK-NEXT: br_on_exn 0, __cpp_exception
>> # CHECK-NEXT: rethrow
>> # CHECK-NEXT: .LBB0_4:
>> # CHECK-NEXT: end_block
>> @@ -157,7 +157,7 @@ test0:
>> # CHECK-NEXT: i32.const 0
>> # CHECK-NEXT: throw 0
>> # CHECK-NEXT: .LBB0_5:
>> -# CHECK-NEXT: global.get __stack_pointer at GLOBAL
>> +# CHECK-NEXT: global.get __stack_pointer
>> # CHECK-NEXT: end_function
>>
>> # CHECK: .globaltype __stack_pointer, i32
>>
>>
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