Remove dmd.iasm from the gluelayer module (#16182)

compiler/src/build.d

@@ -1529,7 +1529,7 @@ auto sourceFiles()
     }
     DmdSources dmd = {
         glue: fileArray(env["D"], "
-            dmsc.d e2ir.d iasm.d iasmdmd.d iasmgcc.d glue.d objc_glue.d
+            dmsc.d e2ir.d iasmdmd.d glue.d objc_glue.d
             s2ir.d tocsym.d toctype.d tocvdebug.d todt.d toir.d toobj.d
         "),
         driver: fileArray(env["D"], "dinifile.d dmdparams.d gluelayer.d lib.d libelf.d libmach.d libmscoff.d libomf.d
@@ -1541,8 +1541,8 @@ auto sourceFiles()
             cli.d clone.d compiler.d cond.d constfold.d cppmangle.d cppmanglewin.d cpreprocess.d ctfeexpr.d
             ctorflow.d dcast.d dclass.d declaration.d delegatize.d denum.d dimport.d
             dinterpret.d dmacro.d dmangle.d dmodule.d doc.d dscope.d dstruct.d dsymbol.d dsymbolsem.d
-            dtemplate.d dtoh.d dversion.d enumsem.d escape.d expression.d expressionsem.d func.d funcsem.d hdrgen.d impcnvtab.d
-            imphint.d importc.d init.d initsem.d inline.d inlinecost.d intrange.d json.d lambdacomp.d
+            dtemplate.d dtoh.d dversion.d enumsem.d escape.d expression.d expressionsem.d func.d funcsem.d hdrgen.d iasm.d iasmgcc.d
+            impcnvtab.d imphint.d importc.d init.d initsem.d inline.d inlinecost.d intrange.d json.d lambdacomp.d
             mtype.d mustuse.d nogc.d nspace.d ob.d objc.d opover.d optimize.d
             parse.d parsetimevisitor.d permissivevisitor.d postordervisitor.d pragmasem.d printast.d rootobject.d safe.d sapply.d
             semantic2.d semantic3.d sideeffect.d statement.d statement_rewrite_walker.d

compiler/src/dmd/frontend.h

@@ -7582,6 +7582,10 @@ extern const char* toChars(const Initializer* const i);
 
 extern const char* toChars(const Type* const t);
 
+extern Statement* asmSemantic(AsmStatement* s, Scope* sc);
+
+extern Statement* gccAsmSemantic(GccAsmStatement* s, Scope* sc);
+
 extern void json_generate(Array<Module* >& modules, OutBuffer& buf);
 
 extern JsonFieldFlags tryParseJsonField(const char* fieldName);

compiler/src/dmd/gluelayer.d

@@ -30,21 +30,11 @@ version (NoBackend)
     struct TYPE;
     alias type = TYPE;
 
-    extern (C++)
-    {
-        // iasm
-        Statement asmSemantic(AsmStatement s, Scope* sc)
-        {
-            sc.func.hasReturnExp = 8;
-            return null;
-        }
-
     extern(C++) abstract class ObjcGlue
     {
         static void initialize() {}
     }
 }
-}
 else version (IN_GCC)
 {
     extern (C++) union tree_node;
@@ -53,11 +43,6 @@ else version (IN_GCC)
     alias code = tree_node;
     alias type = tree_node;
 
-    extern (C++)
-    {
-        Statement asmSemantic(AsmStatement s, Scope* sc);
-    }
-
     // stubs
     extern(C++) abstract class ObjcGlue
     {
@@ -70,6 +55,5 @@ else
     public import dmd.backend.type : type;
     public import dmd.backend.el : elem;
     public import dmd.backend.code_x86 : code;
-    public import dmd.iasm : asmSemantic;
     public import dmd.objc_glue : ObjcGlue;
 }

compiler/src/dmd/iasm.d

@@ -23,7 +23,10 @@ import dmd.tokens;
 import dmd.statement;
 import dmd.statementsem;
 
-version (IN_GCC)
+version (NoBackend)
+{
+}
+else version (IN_GCC)
 {
     import dmd.iasmgcc;
 }
@@ -48,7 +51,11 @@ extern(C++) Statement asmSemantic(AsmStatement s, Scope *sc)
     // Assume assembler code takes care of setting the return value
     sc.func.hasReturnExp |= 8;
 
-    version (MARS)
+    version (NoBackend)
+    {
+        return null;
+    }
+    else version (MARS)
     {
         /* If it starts with a string literal, it's gcc inline asm
          */

compiler/src/dmd/statementsem.d

@@ -41,8 +41,8 @@ import dmd.expressionsem;
 import dmd.func;
 import dmd.funcsem;
 import dmd.globals;
-import dmd.gluelayer;
 import dmd.hdrgen;
+import dmd.iasm;
 import dmd.id;
 import dmd.identifier;
 import dmd.importc;

dub.sdl

@@ -126,7 +126,6 @@ subPackage {
     e2ir,\
     eh,\
     glue,\
-    iasm,\
     iasmdmd,\
     iasmgcc,\
     irstate,\