forked from OSchip/llvm-project
52 lines
1.6 KiB
ArmAsm
52 lines
1.6 KiB
ArmAsm
// RUN: llvm-mc -filetype=obj -triple=arm-none-linux-gnueabi %s -o %t
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// RUN: ld.lld %t -o %t2 2>&1 | FileCheck %s
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// REQUIRES: arm
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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. At present we don't support v6 so we give a
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// warning for unsupported features.
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// CHECK: warning: lld uses extended branch encoding, no object with architecture supporting feature detected.
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// CHECK-NEXT: warning: lld may use movt/movw, no object with architecture supporting feature detected.
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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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.eabi_attribute 6, 6 @ Tag_CPU_arch
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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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.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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// 6 Megabytes, enough to make farthumbfunc out of range of caller on a v6
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// 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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.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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