Merge branch 'dlang:master' into master

Author: gorsing

compiler/src/dmd/backend/arm/cod2.d

@@ -1328,8 +1328,6 @@ private void cdmemsetn(ref CGstate cg, ref CodeBuilder cdb,elem* e,ref regm_t pr
     tym_t tyv = tybasic(evalue.Ety);
     const szv = tysize(tyv);
     assert(cast(int)szv > 1);
-    if (tyfloating(tyv))
-        assert(0);      // TODO AArch64
     regm_t vregs = cgstate.allregs & ~cregs;
     scodelem(cgstate,cdb,evalue,vregs,cregs,false);
 
@@ -1396,14 +1394,20 @@ private void cdmemsetn(ref CGstate cg, ref CodeBuilder cdb,elem* e,ref regm_t pr
     uint opc;
     uint imm3;
     INSTR.szToSizeOpc(szv,imm3,opc);    // shift 0..4
-    assert(szv != REGSIZE * 2); // TODO AArch64
+    if (szv == REGSIZE * 2)
+    {
+        imm3 = 3;
+        opc = 0;
+    }
     cdb.gen1(INSTR.addsub_ext(1,op,S,opt,Rc,option,imm3,Rd,Rl));
 
     if (Rp != Rd)
         genmovreg(cdb,Rp,Rd);
 
     cdb.gen1(INSTR.ldst_immpost(imm3,0,0,0,Rp,Rv));     // L2: STR  Rv,[Rp],#0        // *Rp++ = Rv
     code* L2 = cdb.last();
+    if (szv == REGSIZE * 2)
+        cdb.gen1(INSTR.ldst_immpost(imm3,0,0,0,Rp,Rvhi)); // L2: STR  Rvhi,[Rp],#0    // *Rp++ = Rvhi
     cdb.gen1(INSTR.cmp_shift(1,Rl,0,0,Rp));             // CMP Rp,Rl
     genBranch(cdb,COND.ne,FL.code,cast(block*)L2);      // b.ne L2
     cdb.append(c1);

compiler/src/dmd/e2ir.d

@@ -1395,14 +1395,13 @@ elem* toElem(Expression e, ref IRState irs)
                 /* Structs return a ref, which gets automatically dereferenced.
                  * But we want a pointer to the instance.
                  */
-                if (!ne.placement)
-                    ez = el_una(OPaddr, TYnptr, ez);
+                ez = el_una(OPaddr, TYnptr, ez);
             }
             else
             {
                 StructLiteralExp sle = StructLiteralExp.create(ne.loc, sd, ne.arguments, t);
                 ez = toElemStructLit(sle, irs, EXP.construct, ev.Vsym, false);
-                if (tybasic(ez.Ety) == TYstruct && !ne.placement)
+                if (tybasic(ez.Ety) == TYstruct || ne.placement)
                     ez = el_una(OPaddr, TYnptr, ez);
             }
             static if (0)
@@ -1415,13 +1414,6 @@ elem* toElem(Expression e, ref IRState irs)
                 printf("\n");
             }
 
-            if (ne.placement)
-            {
-                ez = el_bin(OPstreq,TYstruct,el_copytree(ev),ez);
-                ez.ET = ev.ET;
-                ez = el_una(OPaddr, TYnptr, ez);
-            }
-
             e = el_combine(ex, ey);
             e = el_combine(e, ew);
             e = el_combine(e, ezprefix);

compiler/test/runnable/placenew.d

@@ -132,6 +132,31 @@ void test8()
     assert(s.m.a == 3);
 }
 
+/*************************************************/
+// https://github.com/dlang/dmd/issues/21549
+
+struct Test9
+{
+    size_t a, b = 3;
+    this(int x)
+	{
+		a = x;
+	}
+}
+
+void new9(ref Test9 p)
+{
+    new(p) Test9(1);
+}
+
+void test9()
+{
+	Test9 t9 = void;
+	new9(t9);
+	assert(t9.a == 1);
+	// assert(t9.b == 3);  // Test9.init not copied yet
+}
+
 /*************************************************/
 
 int main()
@@ -144,6 +169,7 @@ int main()
     test6();
     test7();
     test8();
+    test9();
 
     return 0;
 }