Fix bugzilla 24884 - backend generates wrong 32-bit code after inlini…

…ng math with double[4]

compiler/src/dmd/backend/x86/cod2.d

@@ -4149,6 +4149,7 @@ void cdmemset(ref CGstate cg, ref CodeBuilder cdb,elem *e,regm_t *pretregs)
     if (valueIsConst)
     {
         regwithvalue(cdb, mAX, value, I64?64:0);
+        getregs(cdb, mAX);
         freenode(evalue);
     }
     else

compiler/test/runnable/test24884.d

@@ -0,0 +1,43 @@
+/*
+REQUIRED_ARGS: -inline
+*/
+
+// https://issues.dlang.org/show_bug.cgi?id=24884
+
+void vecdiff(ref double[4] a, ref double[4] b, ref double[4] result)
+{
+    result[0] = a[0] - b[0];
+    result[1] = a[1] - b[1];
+    result[2] = a[2] - b[2];
+    result[3] = a[3];
+}
+
+pragma(inline, false)
+double norm(ref double[4] a) => 0;
+
+pragma(inline, false)
+void outerproduct(ref double[4] a, ref double[4] b, ref double[4] c) {}
+
+pragma(inline, false)
+double innerproduct(ref double[4] a, ref double[4] b) => 0;
+
+pragma(inline, false)
+void inlinebug(ref double[4] point1, ref double[4] point2, ref double[4] point3, ref double[4] abcd)
+{
+    double[4] v1 = 0.0;
+    double[4] v2 = 0.0;
+    vecdiff(point1, point2, v1);
+    vecdiff(point2, point3, v2);
+
+    outerproduct(v1, v2, abcd);
+    if (norm(abcd) > 0.0)
+    {
+        abcd[0] = innerproduct(abcd, point1);
+    }
+}
+
+void main()
+{
+    double[4] a = 0.0;
+    inlinebug(a, a, a, a);
+}