[llvm-commits] CVS: gcc-3.4/gcc/llvm-representation.c

[Chris Lattner]

Changes in directory gcc-3.4/gcc:

llvm-representation.c updated: 1.1 -> 1.2

---
Log message:

Implement PR205: [llvmgcc] C front-end does not emit 'zeroinitializer' when possible



---
Diffs of the changes:  (+27 -0)

Index: gcc-3.4/gcc/llvm-representation.c
diff -u gcc-3.4/gcc/llvm-representation.c:1.1 gcc-3.4/gcc/llvm-representation.c:1.2
--- gcc-3.4/gcc/llvm-representation.c:1.1	Thu Jan  8 16:35:32 2004
+++ gcc-3.4/gcc/llvm-representation.c	Sat Feb 14 20:19:44 2004
@@ -442,11 +442,38 @@
   llvm_constant_aggregate_print(CA, stderr);
 }
 
+static int isNullConstant(llvm_value *V) {
+  switch (V->VTy) {
+  case ConstantAggregate: {
+    llvm_constant_aggregate *CA = (llvm_constant_aggregate*)V;
+    unsigned i, e;
+    if (V->Ty->ID == StructTyID) {
+      e = V->Ty->NumElements;
+    } else {
+      assert(V->Ty->ID == ArrayTyID && "Invalid aggregate type!");
+      e = V->Ty->x.Array.Size;
+    }
+    for (i = 0; i != e; ++i)
+      if (!isNullConstant(CA->Initializers[i])) return 0;
+    return 1;
+  }
+  default: return 0;
+  case Constant:
+    return !strcmp("0", V2C(V)->Repr);
+  }
+}
+
 
 void llvm_constant_aggregate_print(llvm_constant_aggregate *CE, FILE *F) {
   unsigned i;
   llvm_type *Ty = G2V(CE)->Ty;
   llvm_value **Elements = CE->Initializers;
+
+  if (isNullConstant((llvm_value*)CE)) {
+    fprintf(F, "zeroinitializer");
+    return;
+  }
+
   if (Ty->ID == StructTyID) {
     fprintf(F, "{ ");
     for (i = 0; i != Ty->NumElements; ++i) {