derek.holloway
7502bf64a4
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109 lines
4.3 KiB
ArmAsm
109 lines
4.3 KiB
ArmAsm
// REQUIRES: arm
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// RUN: llvm-mc -arm-add-build-attributes -filetype=obj -triple=thumbv7a-none-linux-gnueabi %s -o %t.o
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// RUN: ld.lld %t.o -o %t
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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 -d %t --print-imm-hex --start-address=0x80000 --stop-address=0x80010 | FileCheck --check-prefix=CHECK1 %s
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// RUN: llvm-objdump -d %t --print-imm-hex --start-address=0x100000 --stop-address=0x100008 | FileCheck --check-prefix=CHECK2 %s
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// RUN: llvm-objdump -d %t --print-imm-hex --start-address=0x180000 --stop-address=0x18000a | FileCheck --check-prefix=CHECK3 %s
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// RUN: llvm-objdump -d %t --print-imm-hex --start-address=0x500004 --stop-address=0x500008 | FileCheck --check-prefix=CHECK4 %s
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// RUN: llvm-objdump -d %t --print-imm-hex --start-address=0x580000 --stop-address=0x580006 | FileCheck --check-prefix=CHECK5 %s
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// RUN: llvm-objdump -d %t --print-imm-hex --start-address=0x1000004 --stop-address=0x100000c | FileCheck --check-prefix=CHECK6 %s
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// RUN: llvm-objdump -d %t --print-imm-hex --start-address=0x1100000 --stop-address=0x1100006 | FileCheck --check-prefix=CHECK7 %s
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// Test Range extension Thunks for the Thumb conditional branch instruction.
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// This instruction only has a range of 1Mb whereas all the other Thumb wide
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// Branch instructions have 16Mb range. We still place our pre-created Thunk
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// Sections at 16Mb intervals as conditional branches to a target defined
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// in a different section are rare.
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.syntax unified
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// Define a function aligned on a half megabyte boundary
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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 0x80000
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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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.globl _start
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_start:
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FUNCTION 00
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// Long Range Thunk needed for 16Mb range branch, can reach pre-created Thunk
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// Section
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bl tfunc33
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// CHECK1: Disassembly of section .text:
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// CHECK1-EMPTY:
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// CHECK1-NEXT: <tfunc00>:
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// CHECK1-NEXT: 80000: 4770 bx lr
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// CHECK1-NEXT: 80002: f37f d7ff bl 0x1000004 <__Thumbv7ABSLongThunk_tfunc33>
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// CHECK1: <__Thumbv7ABSLongThunk_tfunc05>:
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// CHECK1-NEXT: 80008: f27f bffa b.w 0x300000 <tfunc05>
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// CHECK1: <__Thumbv7ABSLongThunk_tfunc00>:
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// CHECK1-NEXT: 8000c: f7ff bff8 b.w 0x80000 <tfunc00>
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FUNCTION 01
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// tfunc02 is within range of tfunc02
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beq.w tfunc02
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// tfunc05 is out of range, and we can't reach the pre-created Thunk Section
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// create a new one.
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bne.w tfunc05
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// CHECK2: <tfunc01>:
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// CHECK2-NEXT: 100000: 4770 bx lr
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// CHECK2-NEXT: 100002: f03f a7fd beq.w 0x180000 <tfunc02>
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// CHECK2-NEXT: 100006: f47f a7ff bne.w 0x80008 <__Thumbv7ABSLongThunk_tfunc05>
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FUNCTION 02
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// We can reach the Thunk Section created for bne.w tfunc05
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bne.w tfunc05
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beq.w tfunc00
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// CHECK3: 180000: 4770 bx lr
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// CHECK3-NEXT: 180002: f440 8001 bne.w 0x80008 <__Thumbv7ABSLongThunk_tfunc05>
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// CHECK3-NEXT: 180006: f400 8001 beq.w 0x8000c <__Thumbv7ABSLongThunk_tfunc00>
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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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// CHECK4: <__Thumbv7ABSLongThunk_tfunc03>:
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// CHECK4-NEXT: 500004: f4ff bffc b.w 0x200000 <tfunc03>
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FUNCTION 10
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// We can't reach any Thunk Section, create a new one
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beq.w tfunc03
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// CHECK5: <tfunc10>:
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// CHECK5-NEXT: 580000: 4770 bx lr
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// CHECK5-NEXT: 580002: f43f a7ff beq.w 0x500004 <__Thumbv7ABSLongThunk_tfunc03>
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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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FUNCTION 16
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FUNCTION 17
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FUNCTION 18
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FUNCTION 19
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FUNCTION 20
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FUNCTION 21
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FUNCTION 22
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FUNCTION 23
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FUNCTION 24
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FUNCTION 25
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FUNCTION 26
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FUNCTION 27
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FUNCTION 28
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FUNCTION 29
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FUNCTION 30
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FUNCTION 31
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// CHECK6: <__Thumbv7ABSLongThunk_tfunc33>:
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// CHECK6-NEXT: 1000004: f0ff bffc b.w 0x1100000 <tfunc33>
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// CHECK6: <__Thumbv7ABSLongThunk_tfunc00>:
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// CHECK6-NEXT: 1000008: f47f 97fa b.w 0x80000 <tfunc00>
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FUNCTION 32
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FUNCTION 33
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// We should be able to reach an existing ThunkSection.
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b.w tfunc00
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// CHECK7: <tfunc33>:
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// CHECK7-NEXT: 1100000: 4770 bx lr
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// CHECK7-NEXT: 1100002: f700 b801 b.w 0x1000008 <__Thumbv7ABSLongThunk_tfunc00>
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