Implemented proper support for naked asm using llvm module level asm. Still not 100% complete, but already 1000 times better that what we had before. Don's BignumX86 implementation from Tango (when turned into a standalone unittest) seems to fully work with no changes, and great performance :)

Fixed align N; in asm blocks.

Fixed inreg parameter passing on x86 for ref/out params.

Removed support for lazy initialization of function local static variables, I have no idea why I ever implemented this, it's not in the D spec, and DMD doesn't support it :P

Some of the global variable related changes might cause minor regressions, but they should be easily fixable.

dmd/declaration.c

@@ -625,6 +625,7 @@ VarDeclaration::VarDeclaration(Loc loc, Type *type, Identifier *id, Initializer
     // LDC
     anonDecl = NULL;
     offset2 = 0;
+    nakedUse = false;
 }
 
 Dsymbol *VarDeclaration::syntaxCopy(Dsymbol *s)

dmd/declaration.h

@@ -274,6 +274,7 @@ struct VarDeclaration : Declaration
     // LDC
     AnonDeclaration* anonDecl;
     unsigned offset2;
+    bool nakedUse;
 };
 
 /**************************************************************/

dmd/mars.c

@@ -888,7 +888,7 @@ int main(int argc, char *argv[])
         global.params.cpu = ARCHthumb;
     }
     else {
-        assert(0 && "Invalid arch");
+        error("invalid cpu architecture specified: %s", global.params.llvmArch);
     }
 
     assert(global.params.cpu != ARCHinvalid);

dmd/statement.h

@@ -161,6 +161,9 @@ struct Statement : Object
     // Back end
     virtual void toIR(IRState *irs);
 
+    // LDC
+    virtual void toNakedIR(IRState *irs);
+
     // Avoid dynamic_cast
     virtual DeclarationStatement *isDeclarationStatement() { return NULL; }
     virtual CompoundStatement *isCompoundStatement() { return NULL; }
@@ -185,6 +188,9 @@ struct ExpStatement : Statement
     Statement *inlineScan(InlineScanState *iss);
 
     void toIR(IRState *irs);
+
+    // LDC
+    void toNakedIR(IRState *irs);
 };
 
 struct CompileStatement : Statement
@@ -234,6 +240,9 @@ struct CompoundStatement : Statement
 
     virtual void toIR(IRState *irs);
 
+    // LDC
+    virtual void toNakedIR(IRState *irs);
+
     virtual CompoundStatement *isCompoundStatement() { return this; }
 };
 
@@ -844,6 +853,7 @@ struct LabelStatement : Statement
 
     // LDC
     bool asmLabel;       // for labels inside inline assembler
+    void toNakedIR(IRState *irs);
 };
 
 struct LabelDsymbol : Dsymbol
@@ -876,6 +886,8 @@ struct AsmStatement : Statement
     // LDC
     // non-zero if this is a branch, contains the target labels identifier
     Identifier* isBranchToLabel;
+
+    void toNakedIR(IRState *irs);
 };
 
 struct AsmBlockStatement : CompoundStatement
@@ -892,6 +904,7 @@ struct AsmBlockStatement : CompoundStatement
     AsmBlockStatement *isAsmBlockStatement() { return this; }
 
     void toIR(IRState *irs);
+    void toNakedIR(IRState *irs);
 };
 
 #endif /* DMD_STATEMENT_H */