Add support for vector types and vector constants.

tests_lit/llvm2ice_tests/undef.ll

 ; This test checks that undef values are represented as zero.
 
 ; RUN: %llvm2ice --verbose none %s | FileCheck  %s
 ; RUN: %llvm2ice -O2 --verbose none %s | FileCheck  %s
 ; RUN: %llvm2ice --verbose none %s | FileCheck --check-prefix=ERRORS %s
 ; RUN: %llvm2iceinsts %s | %szdiff %s | FileCheck --check-prefix=DUMP %s
 ; RUN: %llvm2iceinsts --pnacl %s | %szdiff %s \
 ; RUN:                           | FileCheck --check-prefix=DUMP %s
 
-define i32 @undefi32() {
+define i32 @undef_i32() {
 entry:
-; CHECK-LABEL: undefi32:
   ret i32 undef
+; CHECK-LABEL: undef_i32:
 ; CHECK: mov eax, 0
 ; CHECK: ret
 }
 
-define i64 @undefi64() {
+define i64 @undef_i64() {
 entry:
-; CHECK-LABEL: undefi64:
   ret i64 undef
+; CHECK-LABEL: undef_i64:
 ; CHECK-DAG: mov eax, 0
 ; CHECK-DAG: mov edx, 0
 ; CHECK: ret
 }
 
-define float @undeffloat() {
+define float @undef_float() {
 entry:
-; CHECK-LABEL: undeffloat:
   ret float undef
+; CHECK-LABEL: undef_float:
 ; CHECK-NOT: sub esp
 ; CHECK: fld
 ; CHECK: ret
 }
 
+define <4 x i1> @undef_v4i1() {
+entry:
+  ret <4 x i1> undef
+; CHECK-LABEL: undef_v4i1:
+; CHECK: pxor
+; CHECK: ret
+}
+
+define <8 x i1> @undef_v8i1() {
+entry:
+  ret <8 x i1> undef
+; CHECK-LABEL: undef_v8i1:
+; CHECK: pxor
+; CHECK: ret
+}
+
+define <16 x i1> @undef_v16i1() {
+entry:
+  ret <16 x i1> undef
+; CHECK-LABEL: undef_v16i1:
+; CHECK: pxor
+; CHECK: ret
+}
+
+define <16 x i8> @undef_v16i8() {
+entry:
+  ret <16 x i8> undef
+; CHECK-LABEL: undef_v16i8:
+; CHECK: pxor
+; CHECK: ret
+}
+
+define <8 x i16> @undef_v8i16() {
+entry:
+  ret <8 x i16> undef
+; CHECK-LABEL: undef_v8i16:
+; CHECK: pxor
+; CHECK: ret
+}
+
+define <4 x i32> @undef_v4i32() {
+entry:
+  ret <4 x i32> undef
+; CHECK-LABEL: undef_v4i32:
+; CHECK: pxor
+; CHECK: ret
+}
+
+define <4 x float> @undef_v4f32() {
+entry:
+  ret <4 x float> undef
+; CHECK-LABEL: undef_v4f32:
+; CHECK: pxor
+; CHECK: ret
+}
+
 ; ERRORS-NOT: ICE translation error
 ; DUMP-NOT: SZ