1 files changed, 66 insertions, 0 deletions
diff --git a/test/ELF/arm-thumb-interwork-thunk-v5.s b/test/ELF/arm-thumb-interwork-thunk-v5.s
new file mode 100644
index 000000000000..90aa76e4a3e3
--- /dev/null
+++ b/test/ELF/arm-thumb-interwork-thunk-v5.s
@@ -0,0 +1,66 @@
+// REQUIRES: arm
+// RUN: llvm-mc -arm-add-build-attributes -filetype=obj -triple=armv5-none-linux-gnueabi %s -o %t
+// RUN: ld.lld %t -o %t2
+// RUN: llvm-objdump -d %t2 -triple=armv5-none-linux-gnueabi | FileCheck -check-prefix=CHECK-ARM %s
+// RUN: llvm-objdump -d %t2 -triple=thumbv5-none-linux-gnueabi | FileCheck -check-prefix=CHECK-THUMB %s
+// RUN: ld.lld %t -o %t3 --shared
+// RUN: llvm-objdump -d %t3 -triple=armv5-none-linux-gnueabi | FileCheck -check-prefix=CHECK-ARM-PI %s
+// RUN: llvm-objdump -d %t3 -triple=thumbv5-none-linux-gnueabi | FileCheck -check-prefix=CHECK-THUMB-PI %s
+
+// Test ARM Thumb Interworking on older Arm architectures using Thunks that do
+// not use MOVT/MOVW instructions.
+// For pure interworking (not considering range extension) there is only the
+// case of an Arm B to a Thumb Symbol to consider as in older Arm architectures
+// there is no Thumb B.w that we can intercept with a Thunk and we still assume
+// support for the blx instruction for Thumb BL and BLX to an Arm symbol.
+        .arm
+        .text
+        .syntax unified
+        .cpu    arm10tdmi
+
+        .text
+        .globl _start
+        .type _start, %function
+        .balign 0x1000
+_start:
+        b thumb_func
+        bl thumb_func
+        blx thumb_func
+        bx lr
+
+// CHECK-ARM: _start:
+// CHECK-ARM-NEXT: 11000: 03 00 00 ea     b       #12 <__ARMv5ABSLongThunk_thumb_func>
+// CHECK-ARM-NEXT: 11004: 01 00 00 fa     blx     #4 <thumb_func>
+// CHECK-ARM-NEXT: 11008: 00 00 00 fa     blx     #0 <thumb_func>
+// CHECK-ARM-NEXT: 1100c: 1e ff 2f e1     bx      lr
+
+// CHECK-THUMB: thumb_func:
+// CHECK-THUMB-NEXT: 11010: 70 47   bx      lr
+
+// CHECK-ARM: __ARMv5ABSLongThunk_thumb_func:
+// CHECK-ARM-NEXT: 11014: 04 f0 1f e5     ldr     pc, [pc, #-4]
+// CHECK-ARM: $d:
+// CHECK-ARM-NEXT: 11018: 11 10 01 00     .word   0x00011011
+
+// CHECK-ARM-PI: _start:
+// CHECK-ARM-PI-NEXT: 1000: 03 00 00 ea     b       #12 <__ARMV5PILongThunk_thumb_func>
+// CHECK-ARM-PI-NEXT: 1004: 01 00 00 fa     blx     #4 <thumb_func>
+// CHECK-ARM-PI-NEXT: 1008: 00 00 00 fa     blx     #0 <thumb_func>
+// CHECK-ARM-PI-NEXT: 100c: 1e ff 2f e1     bx      lr
+
+// CHECK-THUMB-PI: thumb_func:
+// CHECK-THUMB-PI-NEXT: 1010: 70 47   bx      lr
+
+// CHECK-ARM-PI: __ARMV5PILongThunk_thumb_func:
+// CHECK-ARM-PI-NEXT: 1014: 04 c0 9f e5     ldr     r12, [pc, #4]
+// CHECK-ARM-PI-NEXT: 1018: 0c c0 8f e0     add     r12, pc, r12
+// CHECK-ARM-PI-NEXT: 101c: 1c ff 2f e1     bx      r12
+// CHECK-ARM-PI: $d:
+// CHECK-ARM-PI-NEXT: 1020: f1 ff ff ff     .word   0xfffffff1
+
+        .section .text.1, "ax", %progbits
+        .thumb
+        .hidden thumb_func
+        .type thumb_func, %function
+thumb_func:
+        bx lr