[JITLink][AArch32] Add initial test for R_ARM_THM_CALL and R_ARM_THM_JUMP24

This test still fails since RuntimeDyldChecker needs a few fixes before it works with Thumb. We can remove the XFAIL once the patch in D158280 landed.

Author: weliveindetail

llvm/test/ExecutionEngine/JITLink/AArch32/ELF_static_thumb_reloc.s

@@ -0,0 +1,73 @@
+# RUN: llvm-mc -triple=thumbv7-linux-gnueabi -arm-add-build-attributes -filetype=obj -o %t.o %s
+# RUN: llvm-objdump -r %t.o | FileCheck --check-prefix=CHECK-TYPE %s
+# RUN: llvm-objdump --disassemble %t.o | FileCheck --check-prefix=CHECK-INSTR %s
+# RUN: llvm-jitlink -noexec -slab-address 0x76ff0000 -slab-allocate 10Kb \
+# RUN:              -slab-page-size 4096 -show-entry-es -check %s %t.o
+
+# This test requires the RuntimeDyldChecker fix from review D158280
+# XFAIL: *
+
+	.text
+	.syntax unified
+
+# CHECK-TYPE: {{[0-9a-f]+}} R_ARM_THM_CALL call_target
+# CHECK-INSTR: 	00000000 <call_site>:
+# CHECK-INSTR: 	       0: f7ff fffe     bl      0x0 <call_site>
+# CHECK-INSTR: 	00000004 <call_target>:
+# CHECK-INSTR: 	       4: 4770          bx      lr
+# We decode the operand with index 2, because bl generates two leading implicit
+# predicate operands that we have to skip in order to decode the call_target operand
+# jitlink-check: decode_operand(call_site, 2) = call_target - next_pc(call_site)
+	.globl	call_site
+	.type	call_site,%function
+	.p2align	1
+	.code	16
+	.thumb_func
+call_site:
+	bl	call_target
+	.size	call_site,	.-call_site
+
+	.globl	call_target
+	.type	call_target,%function
+	.p2align	1
+	.code	16
+	.thumb_func
+call_target:
+	bx	lr
+	.size	call_target,	.-call_target
+
+# CHECK-TYPE: {{[0-9a-f]+}} R_ARM_THM_JUMP24 jump24_target
+# CHECK-INSTR: 	00000006 <jump24_site>:
+# CHECK-INSTR: 	       6: f7ff bffe     b.w     0x6 <jump24_site>
+# CHECK-INSTR: 	0000000a <jump24_target>:
+# CHECK-INSTR: 	       a: 4770          bx      lr
+# b.w generates two implicit predicate operands as well, but they are trailing
+# operands, so there is no need to adjust the operand index.
+# jitlink-check: decode_operand(jump24_site, 0) = jump24_target - next_pc(jump24_site)
+	.globl	jump24_site
+	.type	jump24_site,%function
+	.p2align	1
+	.code	16
+	.thumb_func
+jump24_site:
+	b.w	jump24_target
+	.size	jump24_site,	.-jump24_site
+
+	.globl	jump24_target
+	.type	jump24_target,%function
+	.p2align	1
+	.code	16
+	.thumb_func
+jump24_target:
+	bx	lr
+	.size	jump24_target,	.-jump24_target
+
+# Empty main function for jitlink to be happy
+	.globl	main
+	.type	main,%function
+	.p2align	1
+	.code	16
+	.thumb_func
+main:
+	bx	lr
+	.size	main,	.-main