runtime error: reference binding to null pointer of type 'const struct FloatType'

[regehr]

regehr@john-home:~/tmp$ cat src.ll
source_filename = "M2"
target datalayout = "e-m:e-i8:8:32-i16:16:32-i64:64-i128:128-n32:64-S128"
target triple = "aarch64-linux-gnu"

define double @f(i64 %0) {
  %2 = icmp eq i64 %0, 0
  %3 = uitofp i1 %2 to double
  ret double %3
}
regehr@john-home:~/tmp$ cat tgt.ll
source_filename = "M2"
target datalayout = "e-m:e-i8:8:32-i16:16:32-i64:64-i128:128-n32:64-S128"
target triple = "aarch64-linux-gnu"

; Function Attrs: mustprogress nofree norecurse nosync nounwind willreturn memory(none)
define double @f(i64 %0) local_unnamed_addr #0 {
arm_tv_entry:
  %a4_5 = icmp eq i64 %0, 0
  %a5_8 = select i1 %a4_5, i64 4607182418800017408, i64 0
  %a6_2 = bitcast i64 %a5_8 to double
  ret double %a6_2
}

attributes #0 = { mustprogress nofree norecurse nosync nounwind willreturn memory(none) }
regehr@john-home:~/tmp$ ~/alive2-regehr/build/alive-tv src.ll tgt.ll

----------------------------------------
define double @f(i64 %#0) {
#1:
  %#2 = icmp eq i64 %#0, 0
  %#3 = uitofp i1 %#2 to double
  ret double %#3
}
=>
define double @f(i64 %#0) nofree willreturn memory(none) {
arm_tv_entry:
  %a4_5 = icmp eq i64 %#0, 0
  %a5_8 = select i1 %a4_5, i64 4607182418800017408, i64 0
  %a6_2 = bitcast i64 %a5_8 to double
  ret double %a6_2
}
/home/regehr/alive2-regehr/ir/type.cpp:449:58: runtime error: reference binding to null pointer of type 'const struct FloatType'
regehr@john-home:~/tmp$