Fix inline asm labels in template functions.

This is a giant kludge to avoid a redesign of the inline asm
handling code. I'd be glad if somebody came up with a better
solution.

GitHub: Fixes #340.

gen/asm-x86.h

@@ -1890,7 +1890,9 @@ namespace AsmParserx8664
 
         void addLabel ( char* id )
         {
-            printLabelName(insnTemplate, sc->func->mangle(), id);
+            // We need to delay emitting the actual function name, see
+            // replace_func_name in asmstmt.cpp for details.
+            printLabelName(insnTemplate, "<<func>>", id);
         }
 
         /* Determines whether the operand is a register, memory reference

gen/asmstmt.cpp

@@ -149,6 +149,26 @@ AsmParserCommon* asmparser = NULL;
 #include "asm-x86.h" // x86_64 assembly parser
 #undef ASM_X86_64
 
+/**
+ * Replaces <<func>> with the name of the currently codegen'd function.
+ *
+ * This kludge is required to handle labels correctly, as the instruction
+ * strings for jumps, … are generated during semantic3, but attribute inference
+ * might change the function type (and hence the mangled name) right at the end
+ * of semantic3.
+ */
+static void replace_func_name(IRState* p, std::string& insnt)
+{
+    static const std::string needle("<<func>>");
+
+    size_t pos;
+    while (std::string::npos != (pos = insnt.find(needle)))
+    {
+        // This will only happen for few instructions, and only once for those.
+        insnt.replace(pos, needle.size(), p->func()->decl->mangle(false));
+    }
+}
+
 Statement *AsmStatement::semantic(Scope *sc)
 {
     if (sc->func && sc->func->isSafe())
@@ -442,6 +462,8 @@ AsmStatement::toIR(IRState * irs)
 
     // excessive commas are removed later...
 
+    replace_func_name(irs, code->insnTemplate);
+
     // push asm statement
     IRAsmStmt* asmStmt = new IRAsmStmt;
     asmStmt->code = code->insnTemplate;
@@ -836,6 +858,7 @@ void AsmStatement::toNakedIR(IRState *p)
     AsmCode * code = (AsmCode *) asmcode;
 
     // build asm stmt
+    replace_func_name(p, code->insnTemplate);
     p->nakedAsm << "\t" << code->insnTemplate << std::endl;
 }