# RUN: llc -march=hexagon -run-pass=hexagon-cext-opt %s -o - | FileCheck %s

# Check that this test doesn't crash.
# CHECK: %0:intregs = A2_tfrsi @0

--- |
  target triple = "hexagon"

  @0 = external global [0 x i8]
  @1 = external constant [2 x i64]

  define void @f0() #0 {
  b0:
    tail call fastcc void @f1(float* inttoptr (i64 add (i64 ptrtoint ([0 x i8]* @0 to i64), i64 128) to float*), i64* getelementptr inbounds ([2 x i64], [2 x i64]* @1, i32 0, i32 0))
    ret void
  }

  declare fastcc void @f1(float* nocapture readonly, i64* nocapture readonly) #1

  attributes #0 = { alwaysinline nounwind "target-cpu"="hexagonv60" }
  attributes #1 = { noinline norecurse nounwind "target-cpu"="hexagonv60" }
...

---
name: f0
tracksRegLiveness: true
body: |
  bb.0:
    %0:intregs = A2_tfrsi @0
    %1:intregs = A2_tfrsi 0
    %2:doubleregs = REG_SEQUENCE %0, %subreg.isub_lo, %1, %subreg.isub_hi
    %3:doubleregs = CONST64 128
    %4:doubleregs = A2_addp %2, %3
    %5:intregs = A2_tfrsi @1
    $r0 = COPY %4.isub_lo
    $r1 = COPY %5
    PS_tailcall_i @f1, hexagoncsr, implicit $r0, implicit $r1
...