forked from OSchip/llvm-project
66 lines
2.5 KiB
ArmAsm
66 lines
2.5 KiB
ArmAsm
// REQUIRES: arm
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// RUN: llvm-mc -arm-add-build-attributes -filetype=obj -triple=armv6-none-linux-gnueabi %s -o %t
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// RUN: ld.lld %t -o %t2
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// RUN: llvm-objdump -d --triple=armv6-none-linux-gnueabi --start-address=0x21000 --stop-address=0x21008 %t2 | FileCheck --check-prefix=CHECK-ARM1 %s
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// RUN: llvm-objdump -d --triple=thumbv6-none-linux-gnueabi %t2 --start-address=0x21008 --stop-address=0x2100c | FileCheck --check-prefix=CHECK-THUMB1 %s
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// RUN: llvm-objdump -d --triple=armv6-none-linux-gnueabi --start-address=0x22100c --stop-address=0x221014 %t2 | FileCheck --check-prefix=CHECK-ARM2 %s
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// RUN: llvm-objdump -d --triple=thumbv6-none-linux-gnueabi %t2 --start-address=0x622000 --stop-address=0x622002 | FileCheck --check-prefix=CHECK-THUMB2 %s
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/// On Arm v6 the range of a Thumb BL instruction is only 4 megabytes as the
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/// extended range encoding is not supported. The following example has a Thumb
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/// BL that is out of range on ARM v6 and requires a range extension thunk.
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/// As v6 does not support MOVT or MOVW instructions the Thunk must not
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/// use these instructions either.
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/// ARM v6 supports blx so we shouldn't see the blx not supported warning.
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// CHECK-NOT: warning: lld uses blx instruction, no object with architecture supporting feature detected.
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.text
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.syntax unified
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.cpu arm1176jzf-s
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.globl _start
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.type _start,%function
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.balign 0x1000
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_start:
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bl thumbfunc
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bx lr
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// CHECK-ARM1: Disassembly of section .text:
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// CHECK-ARM1-EMPTY:
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// CHECK-ARM1-NEXT: <_start>:
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// CHECK-ARM1-NEXT: 21000: 00 00 00 fa blx #0 <thumbfunc>
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// CHECK-ARM1-NEXT: 21004: 1e ff 2f e1 bx lr
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.thumb
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.section .text.2, "ax", %progbits
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.globl thumbfunc
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.type thumbfunc,%function
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thumbfunc:
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bl farthumbfunc
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// CHECK-THUMB1: <thumbfunc>:
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// CHECK-THUMB1-NEXT: 21008: 00 f2 00 e8 blx #2097152
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/// 6 Megabytes, enough to make farthumbfunc out of range of caller
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/// on a v6 Arm, but not on a v7 Arm.
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.section .text.3, "ax", %progbits
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.space 0x200000
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// CHECK-ARM2: <__ARMv5ABSLongThunk_farthumbfunc>:
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// CHECK-ARM2-NEXT: 22100c: 04 f0 1f e5 ldr pc, [pc, #-4]
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// CHECK-ARM2: <$d>:
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// CHECK-ARM2-NEXT: 221010: 01 20 62 00 .word 0x00622001
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.section .text.4, "ax", %progbits
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.space 0x200000
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.section .text.5, "ax", %progbits
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.space 0x200000
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.thumb
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.section .text.6, "ax", %progbits
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.balign 0x1000
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.globl farthumbfunc
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.type farthumbfunc,%function
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farthumbfunc:
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bx lr
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// CHECK-THUMB2: <farthumbfunc>:
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// CHECK-THUMB2-NEXT: 622000: 70 47 bx lr
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