Modify pnacl subzero to be able to read pnacl bitcode files.

tests_lit/llvm2ice_tests/load.ll

 ; RUIN: %llvm2ice -verbose inst %s | FileCheck %s
 ; RUIN: %llvm2ice --verbose none %s | FileCheck --check-prefix=ERRORS %s
-; RUN: %szdiff --llvm2ice=%llvm2ice %s | FileCheck --check-prefix=DUMP %s
+; RUN: %llvm2iceinsts %s | %szdiff %s | FileCheck --check-prefix=DUMP %s
+; RUN: %llvm2iceinsts --pnacl %s | %szdiff %s \
+; RUN:                           | FileCheck --check-prefix=DUMP %s
 
 define void @load_i64(i32 %addr_arg) {
 entry:
-  %ptr64 = inttoptr i32 %addr_arg to i64*
-  %iv = load i64* %ptr64, align 1
+  %__1 = inttoptr i32 %addr_arg to i64*
+  %iv = load i64* %__1, align 1
   ret void
 
-; CHECK:      %ptr64 = i32 %addr_arg
+; CHECK:      %__1 = i32 %addr_arg
 ; CHECK-NEXT:  %iv = load i64* {{.*}}, align 1
 ; CHECK-NEXT:  ret void
 }
 
 define void @load_i32(i32 %addr_arg) {
 entry:
-  %ptr32 = inttoptr i32 %addr_arg to i32*
-  %iv = load i32* %ptr32, align 1
+  %__1 = inttoptr i32 %addr_arg to i32*
+  %iv = load i32* %__1, align 1
   ret void
 
-; CHECK:       %ptr32 = i32 %addr_arg
+; CHECK:       %__1 = i32 %addr_arg
 ; CHECK-NEXT:  %iv = load i32* {{.*}}, align 1
 ; CHECK-NEXT:  ret void
 }
 
 define void @load_i16(i32 %addr_arg) {
 entry:
-  %ptr16 = inttoptr i32 %addr_arg to i16*
-  %iv = load i16* %ptr16, align 1
+  %__1 = inttoptr i32 %addr_arg to i16*
+  %iv = load i16* %__1, align 1
   ret void
 
-; CHECK:       %ptr16 = i32 %addr_arg
+; CHECK:       %__1 = i32 %addr_arg
 ; CHECK-NEXT:  %iv = load i16* {{.*}}, align 1
 ; CHECK-NEXT:  ret void
 }
 
 define void @load_i8(i32 %addr_arg) {
 entry:
-  %ptr8 = inttoptr i32 %addr_arg to i8*
-  %iv = load i8* %ptr8, align 1
+  %__1 = inttoptr i32 %addr_arg to i8*
+  %iv = load i8* %__1, align 1
   ret void
 
-; CHECK:       %ptr8 = i32 %addr_arg
+; CHECK:       %__1 = i32 %addr_arg
 ; CHECK-NEXT:  %iv = load i8* {{.*}}, align 1
 ; CHECK-NEXT:  ret void
 }
 
 ; ERRORS-NOT: ICE translation error
 ; DUMP-NOT: SZ