Make sure that all globals are internal, except for "start" functions.

tests_lit/llvm2ice_tests/fp_const_pool.ll

 ; This tests that different floating point constants (such as 0.0 and -0.0)
 ; remain distinct even when they sort of look equal, and also that different
 ; instances of the same floating point constant (such as NaN and NaN) get the
 ; same constant pool entry even when "a==a" would suggest they are different.
 
 ; REQUIRES: allow_dump
 
-define void @consume_float(float %f) {
+define internal void @consume_float(float %f) {
   ret void
 }
 
-define void @consume_double(double %d) {
+define internal void @consume_double(double %d) {
   ret void
 }
 
-define void @test_zeros() {
+define internal void @test_zeros() {
 entry:
   call void @consume_float(float 0.0)
   call void @consume_float(float -0.0)
   call void @consume_double(double 0.0)
   call void @consume_double(double -0.0)
   ret void
 }
 ; Parse the function, dump the bitcode back out, and stop without translating.
 ; This tests that +0.0 and -0.0 aren't accidentally merged into a single
 ; zero-valued constant pool entry.
 ;
 ; RUN: %p2i -i %s --insts | FileCheck --check-prefix=ZERO %s
 ; ZERO: test_zeros
 ; ZERO-NEXT: entry:
 ; ZERO-NEXT: call void @consume_float(float 0.0
 ; ZERO-NEXT: call void @consume_float(float -0.0
 ; ZERO-NEXT: call void @consume_double(double 0.0
 ; ZERO-NEXT: call void @consume_double(double -0.0
 
 
-define void @test_nans() {
+define internal void @test_nans() {
 entry:
   call void @consume_float(float 0x7FF8000000000000)
   call void @consume_float(float 0x7FF8000000000000)
   call void @consume_float(float 0xFFF8000000000000)
   call void @consume_float(float 0xFFF8000000000000)
   call void @consume_double(double 0x7FF8000000000000)
   call void @consume_double(double 0x7FF8000000000000)
   call void @consume_double(double 0xFFF8000000000000)
   call void @consume_double(double 0xFFF8000000000000)
   ret void
@@ skipping 14 matching lines @@
 ;
 ; RUN: %p2i -i %s --filetype=asm --llvm-source \
 ; RUN:   | FileCheck --check-prefix=NANS3 %s
 ; NANS3: double nan
 ; NANS3-NOT: double nan
 ;
 ; RUN: %p2i -i %s --filetype=asm --llvm-source \
 ; RUN:   | FileCheck --check-prefix=NANS4 %s
 ; NANS4: double -nan
 ; NANS4-NOT: double -nan