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      1 # RUN: llc -march=hexagon -run-pass=hexagon-cext-opt %s -o - | FileCheck %s
      2 
      3 # Check that this test doesn't crash.
      4 # CHECK: %0:intregs = A2_tfrsi @0
      5 
      6 --- |
      7   target triple = "hexagon"
      8 
      9   @0 = external global [0 x i8]
     10   @1 = external constant [2 x i64]
     11 
     12   define void @f0() #0 {
     13   b0:
     14     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))
     15     ret void
     16   }
     17 
     18   declare fastcc void @f1(float* nocapture readonly, i64* nocapture readonly) #1
     19 
     20   attributes #0 = { alwaysinline nounwind "target-cpu"="hexagonv60" }
     21   attributes #1 = { noinline norecurse nounwind "target-cpu"="hexagonv60" }
     22 ...
     23 
     24 ---
     25 name: f0
     26 tracksRegLiveness: true
     27 body: |
     28   bb.0:
     29     %0:intregs = A2_tfrsi @0
     30     %1:intregs = A2_tfrsi 0
     31     %2:doubleregs = REG_SEQUENCE %0, %subreg.isub_lo, %1, %subreg.isub_hi
     32     %3:doubleregs = CONST64 128
     33     %4:doubleregs = A2_addp %2, %3
     34     %5:intregs = A2_tfrsi @1
     35     $r0 = COPY %4.isub_lo
     36     $r1 = COPY %5
     37     PS_tailcall_i @f1, hexagoncsr, implicit $r0, implicit $r1
     38 ...
     39