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eb66b33867
I did this a long time ago with a janky python script, but now clang-format has built-in support for this. I fed clang-format every line with a #include and let it re-sort things according to the precise LLVM rules for include ordering baked into clang-format these days. I've reverted a number of files where the results of sorting includes isn't healthy. Either places where we have legacy code relying on particular include ordering (where possible, I'll fix these separately) or where we have particular formatting around #include lines that I didn't want to disturb in this patch. This patch is *entirely* mechanical. If you get merge conflicts or anything, just ignore the changes in this patch and run clang-format over your #include lines in the files. Sorry for any noise here, but it is important to keep these things stable. I was seeing an increasing number of patches with irrelevant re-ordering of #include lines because clang-format was used. This patch at least isolates that churn, makes it easy to skip when resolving conflicts, and gets us to a clean baseline (again). llvm-svn: 304787
93 lines
3.4 KiB
C++
93 lines
3.4 KiB
C++
//===-- WebAssemblyWasmObjectWriter.cpp - WebAssembly Wasm Writer ---------===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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///
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/// \file
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/// \brief This file handles Wasm-specific object emission, converting LLVM's
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/// internal fixups into the appropriate relocations.
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///
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//===----------------------------------------------------------------------===//
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#include "MCTargetDesc/WebAssemblyFixupKinds.h"
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#include "MCTargetDesc/WebAssemblyMCTargetDesc.h"
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#include "llvm/MC/MCFixup.h"
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#include "llvm/MC/MCSymbolWasm.h"
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#include "llvm/MC/MCWasmObjectWriter.h"
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#include "llvm/Support/Casting.h"
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#include "llvm/Support/ErrorHandling.h"
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#include "llvm/Support/Wasm.h"
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using namespace llvm;
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namespace {
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class WebAssemblyWasmObjectWriter final : public MCWasmObjectTargetWriter {
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public:
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explicit WebAssemblyWasmObjectWriter(bool Is64Bit);
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private:
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unsigned getRelocType(MCContext &Ctx, const MCValue &Target,
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const MCFixup &Fixup, bool IsPCRel) const override;
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};
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} // end anonymous namespace
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WebAssemblyWasmObjectWriter::WebAssemblyWasmObjectWriter(bool Is64Bit)
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: MCWasmObjectTargetWriter(Is64Bit) {}
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// Test whether the given expression computes a function address.
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static bool IsFunctionExpr(const MCExpr *Expr) {
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if (const MCSymbolRefExpr *SyExp =
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dyn_cast<MCSymbolRefExpr>(Expr))
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return cast<MCSymbolWasm>(SyExp->getSymbol()).isFunction();
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if (const MCBinaryExpr *BinOp =
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dyn_cast<MCBinaryExpr>(Expr))
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return IsFunctionExpr(BinOp->getLHS()) != IsFunctionExpr(BinOp->getRHS());
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if (const MCUnaryExpr *UnOp =
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dyn_cast<MCUnaryExpr>(Expr))
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return IsFunctionExpr(UnOp->getSubExpr());
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return false;
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}
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unsigned WebAssemblyWasmObjectWriter::getRelocType(MCContext &Ctx,
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const MCValue &Target,
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const MCFixup &Fixup,
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bool IsPCRel) const {
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// WebAssembly functions are not allocated in the data address space. To
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// resolve a pointer to a function, we must use a special relocation type.
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bool IsFunction = IsFunctionExpr(Fixup.getValue());
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assert(!IsPCRel);
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switch (unsigned(Fixup.getKind())) {
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case WebAssembly::fixup_code_sleb128_i32:
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if (IsFunction)
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return wasm::R_WEBASSEMBLY_TABLE_INDEX_SLEB;
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return wasm::R_WEBASSEMBLY_GLOBAL_ADDR_SLEB;
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case WebAssembly::fixup_code_sleb128_i64:
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llvm_unreachable("fixup_sleb128_i64 not implemented yet");
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case WebAssembly::fixup_code_uleb128_i32:
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if (IsFunction)
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return wasm::R_WEBASSEMBLY_FUNCTION_INDEX_LEB;
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return wasm::R_WEBASSEMBLY_GLOBAL_ADDR_LEB;
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case FK_Data_4:
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if (IsFunction)
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return wasm::R_WEBASSEMBLY_TABLE_INDEX_I32;
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return wasm::R_WEBASSEMBLY_GLOBAL_ADDR_I32;
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case FK_Data_8:
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llvm_unreachable("FK_Data_8 not implemented yet");
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default:
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llvm_unreachable("unimplemented fixup kind");
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}
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}
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MCObjectWriter *llvm::createWebAssemblyWasmObjectWriter(raw_pwrite_stream &OS,
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bool Is64Bit) {
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MCWasmObjectTargetWriter *MOTW = new WebAssemblyWasmObjectWriter(Is64Bit);
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return createWasmObjectWriter(MOTW, OS);
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}
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