derek.holloway
7502bf64a4
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94 lines
2.8 KiB
ArmAsm
94 lines
2.8 KiB
ArmAsm
// REQUIRES: arm
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// RUN: llvm-mc -arm-add-build-attributes -filetype=obj -triple=armv7a-none-linux-gnueabi %s -o %t
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// RUN: ld.lld %t -o %t2
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// The output file is large, most of it zeroes. We dissassemble only the
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// parts we need to speed up the test and avoid a large output file
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// RUN: llvm-objdump --no-print-imm-hex -d %t2 --start-address=0x100002 --stop-address=0x10000a | FileCheck --check-prefix=CHECK1 %s
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// RUN: llvm-objdump --no-print-imm-hex -d %t2 --start-address=0x1000004 --stop-address=0x1000026 | FileCheck --check-prefix=CHECK2 %s
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// RUN: llvm-objdump --no-print-imm-hex -d %t2 --start-address=0x1100014 --stop-address=0x1100022 | FileCheck --check-prefix=CHECK3 %s
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// In this test case a branch that is in range and does not need its range
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// extended can be pushed out of range by another Thunk, necessitating another
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// pass
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.macro FUNCTION suff
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.section .text.\suff\(), "ax", %progbits
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.thumb
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.balign 0x100000
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.globl tfunc\suff\()
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.type tfunc\suff\(), %function
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tfunc\suff\():
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bx lr
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.endm
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FUNCTION 00
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.globl _start
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_start:
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bl target
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b.w arm_target
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// arm_target is in range but needs an interworking thunk
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// CHECK1: <_start>:
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// CHECK1-NEXT: 100002: f300 d006 bl 0x1000012 <__Thumbv7ABSLongThunk_target>
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// CHECK1-NEXT: 100006: f2ff 97ff b.w 0x1000008 <__Thumbv7ABSLongThunk_arm_target>
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nop
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nop
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nop
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.globl target2
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.type target2, %function
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nop
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target2:
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FUNCTION 01
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FUNCTION 02
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FUNCTION 03
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FUNCTION 04
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FUNCTION 05
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FUNCTION 06
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FUNCTION 07
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FUNCTION 08
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FUNCTION 09
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FUNCTION 10
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FUNCTION 11
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FUNCTION 12
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FUNCTION 13
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FUNCTION 14
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FUNCTION 15
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.section .text.16, "ax", %progbits
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.arm
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.globl arm_target
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.type arm_target, %function
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arm_target:
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bx lr
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// CHECK2: 01000004 <arm_target>:
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// CHECK2: <__Thumbv7ABSLongThunk_arm_target>:
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// CHECK2-NEXT: 1000008: f240 0c04 movw r12, #4
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// CHECK2-NEXT: 100000c: f2c0 1c00 movt r12, #256
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// CHECK2-NEXT: 1000010: 4760 bx r12
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// CHECK2: <__Thumbv7ABSLongThunk_target>:
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// CHECK2-NEXT: 1000012: f0ff bfff b.w 0x1100014 <target>
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// CHECK2: <__Thumbv7ABSLongThunk_target2>:
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// CHECK2-NEXT: 1000016: f4ff 97fc b.w 0x100012 <target2>
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.section .text.17, "ax", %progbits
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// Just enough space so that bl target is in range if no extension thunks are
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// generated.
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.space 0x100000 - 6
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.section .text.18, "ax", %progbits
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.thumb
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.globl target
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.type target, %function
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// target is at maximum ARM branch range away from caller.
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target:
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// Similar case in the backwards direction
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bl target2
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nop
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nop
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bx lr
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// CHECK3: <target>:
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// CHECK3-NEXT: 1100014: f6ff ffff bl 0x1000016 <__Thumbv7ABSLongThunk_target2>
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// CHECK3-NEXT: 1100018: bf00 nop
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// CHECK3-NEXT: 110001a: bf00 nop
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// CHECK3-NEXT: 110001c: 4770 bx lr
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