handle structural constants in calls

src/analyzer.js

@@ -281,6 +281,16 @@ function analyzer(data, sidePass) {
               Array.prototype.splice.apply(params, [i, 1].concat(toAdd));
               i += toAdd.length;
               continue;
+            } else if (param.intertype == 'structvalue') {
+              // 'flatten' out the struct into scalars
+              var toAdd = param.params;
+              toAdd.forEach(function(param) {
+                assert(param.intertype == 'value' && (param.type in Runtime.FLOAT_TYPES || getNumIntChunks(param.type) == 1), param.type);
+                param.byval = 0;
+              });
+              Array.prototype.splice.apply(params, [i, 1].concat(toAdd));
+              i += toAdd.length;
+              continue;
             }
             i++;
           }

tests/cases/callwithstructural.ll

@@ -0,0 +1,29 @@
+; ModuleID = 'foo.bc'
+target datalayout = "e-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-p:32:32:32-v128:32:32"
+target triple = "le32-unknown-nacl"
+
+%ac = type { i8*, i32 }
+
+@0 = constant [9 x i8] c"func %s\0A\00"
+@1 = constant [4 x i8] c"foo\00"
+
+declare void @llvm.trap() noreturn nounwind
+
+define void @direct(%ac) {
+entry:
+  %str = alloca %ac
+  store %ac %0, %ac* %str
+  %1 = getelementptr inbounds %ac* %str, i32 0, i32 0
+  %2 = load i8** %1
+  call void (i8*, ...)* @printf(i8* getelementptr inbounds ([9 x i8]* @0, i32 0, i32 0), i8* %2)
+  ret void
+}
+
+declare void @printf(i8*, ...)
+
+define i32 @main() {
+entry:
+  call void @direct(%ac { i8* getelementptr inbounds ([4 x i8]* @1, i32 0, i32 0), i32 3 })
+  ret i32 0
+}
+

tests/cases/callwithstructural.txt

@@ -0,0 +1 @@
+func foo