Extend the AsmWriter to print unnamed numbered types as "%0 = type ..."

and unnamed numbered global variables as "@0 = global ...". Extend the
AsmParser to recognize these forms.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@78859 91177308-0d34-0410-b5e6-96231b3b80d8

test/Assembler/unnamed.ll

@@ -0,0 +1,42 @@
+; RUN: llvm-as < %s | llvm-dis
+
+%0 = type { %1, %2 }                              ; type %0
+%1 = type { i32 }                                 ; type %1
+%2 = type { float, double }                       ; type %2
+
+@0 = global i32 0
+@1 = global float 3.0
+@2 = global i8* null
+
+define float @foo(%0* %p) nounwind {
+  %t = load %0* %p                                ; <%0> [#uses=2]
+  %s = extractvalue %0 %t, 1, 0                   ; <float> [#uses=1]
+  %r = insertvalue %0 %t, double 2.000000e+00, 1, 1; <%0> [#uses=1]
+  store %0 %r, %0* %p
+  ret float %s
+}
+
+define float @bar(%0* %p) nounwind {
+  store %0 { %1 { i32 4 }, %2 { float 4.000000e+00, double 2.000000e+01 } }, %0* %p
+  ret float 7.000000e+00
+}
+
+define float @car(%0* %p) nounwind {
+  store %0 { %1 undef, %2 { float undef, double 2.000000e+01 } }, %0* %p
+  ret float undef
+}
+
+define float @dar(%0* %p) nounwind {
+  store %0 { %1 zeroinitializer, %2 { float 0.000000e+00, double 2.000000e+01 } }, %0* %p
+  ret float 0.000000e+00
+}
+
+define i32* @qqq() {
+  ret i32* @0
+}
+define float* @rrr() {
+  ret float* @1
+}
+define i8** @sss() {
+  ret i8** @2
+}