Subzero: Emit functions and global initializers in a separate thread.

tests_lit/llvm2ice_tests/globalrelocs.ll

 ; Tests if we handle global variables with relocation initializers.
 
 ; REQUIRES: allow_dump
 
 ; Test that we handle it in the ICE converter.
-; RUN: %lc2i -i %s --args -verbose inst | %iflc FileCheck %s
+; RUN: %lc2i -i %s --args -verbose inst -threads=0 | %iflc FileCheck %s
 
 ; Test that we handle it using Subzero's bitcode reader.
-; RUN: %p2i -i %s --args -verbose inst | FileCheck %s
+; RUN: %p2i -i %s --args -verbose inst -threads=0 | FileCheck %s
 
 @bytes = internal global [7 x i8] c"abcdefg"
 ; CHECK: @bytes = internal global [7 x i8] c"abcdefg"
 ; CHECK:        .type   bytes,@object
 ; CHECK:        .section        .data,"aw",@progbits
 ; CHECK:bytes:
 ; CHECK:        .byte   97
 ; CHECK:        .byte   98
 ; CHECK:        .byte   99
 ; CHECK:        .byte   100
@@ skipping 231 matching lines @@
 ; CHECK:short:
 ; CHECK:        .zero   2
 ; CHECK:        .size   short, 2
 
 define void @func() {
   ret void
 }
 
 ; CHECK: define void @func() {