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[WebAssembly] Initial WebAssembly support in clang

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This implements basic support for compiling (though not yet assembling
or linking) for a WebAssembly target. Note that ABI details are not yet
finalized, and may change.

Differential Revision: http://reviews.llvm.org/D12002

llvm-svn: 246814
This commit is contained in:
Dan Gohman
2015-09-03 22:51:53 +00:00
parent e6702ca0e2
commit c285307e14
32 changed files with 1725 additions and 13 deletions
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12
clang/lib/CodeGen/CodeGenModule.cpp
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@@ -66,6 +66,7 @@ static CGCXXABI *createCXXABI(CodeGenModule &CGM) {
case TargetCXXABI::iOS64:
case TargetCXXABI::GenericMIPS:
case TargetCXXABI::GenericItanium:
case TargetCXXABI::WebAssembly:
return CreateItaniumCXXABI(CGM);
case TargetCXXABI::Microsoft:
return CreateMicrosoftCXXABI(CGM);
@@ -819,9 +820,14 @@ void CodeGenModule::SetLLVMFunctionAttributesForDefinition(const Decl *D,
if (alignment)
F->setAlignment(alignment);
// C++ ABI requires 2-byte alignment for member functions.
if (F->getAlignment() < 2 && isa<CXXMethodDecl>(D))
F->setAlignment(2);
// Some C++ ABIs require 2-byte alignment for member functions, in order to
// reserve a bit for differentiating between virtual and non-virtual member
// functions. If the current target's C++ ABI requires this and this is a
// member function, set its alignment accordingly.
if (getTarget().getCXXABI().areMemberFunctionsAligned()) {
if (F->getAlignment() < 2 && isa<CXXMethodDecl>(D))
F->setAlignment(2);
}
}
void CodeGenModule::SetCommonAttributes(const Decl *D,