134 lines
6 KiB
ArmAsm
134 lines
6 KiB
ArmAsm
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// REQUIRES: arm
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// RUN: llvm-mc -arm-add-build-attributes -filetype=obj -triple=thumbv4t-none-linux-gnueabi %s -o %t.o
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// RUN: ld.lld %t.o -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-show-raw-insn -d %t2 --start-address=0x100000 --stop-address=0x10000c | FileCheck --check-prefix=CHECK1 %s
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// RUN: llvm-objdump --no-show-raw-insn -d %t2 --start-address=0x200000 --stop-address=0x200002 | FileCheck --check-prefix=CHECK2 %s
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// RUN: llvm-objdump --no-show-raw-insn -d %t2 --start-address=0x300000 --stop-address=0x300002 | FileCheck --check-prefix=CHECK3 %s
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// RUN: llvm-objdump --no-show-raw-insn -d %t2 --start-address=0x400000 --stop-address=0x400028 | FileCheck --check-prefix=CHECK4 %s
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// RUN: llvm-objdump --no-show-raw-insn -d %t2 --start-address=0x700000 --stop-address=0x700014 | FileCheck --check-prefix=CHECK5 %s
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// RUN: llvm-objdump --no-show-raw-insn -d %t2 --start-address=0x800000 --stop-address=0x800004 | FileCheck --check-prefix=CHECK6 %s
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// RUN: llvm-objdump --no-show-raw-insn -d %t2 --start-address=0x900000 --stop-address=0x900004 | FileCheck --check-prefix=CHECK7 %s
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// RUN: llvm-objdump --no-show-raw-insn -d %t2 --start-address=0xa00000 --stop-address=0xa00018 | FileCheck --check-prefix=CHECK8 %s
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// RUN: llvm-objdump --no-show-raw-insn -d %t2 --start-address=0xb00000 --stop-address=0xb00004 | FileCheck --check-prefix=CHECK9 %s
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/// Test the Range extension Thunks for Thumb when all the code is in a single
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/// OutputSection. The Thumb BL instruction has a range of 4Mb. We create a
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/// series of functions a megabyte apart. We expect range extension thunks to be
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/// created when a branch is out of range. Thunks will be reused whenever they
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/// are in range.
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.syntax unified
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/// Define a function aligned on a 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 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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.section .text, "ax", %progbits
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.thumb
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.globl _start
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_start:
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/// tfunc00 and tfunc03 are within 4MB, so no Range Thunks expected.
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bl tfunc00
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bl tfunc03
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/// tfunc04 is > 4MB away, expect a Range Thunk to be generated, to go into
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/// the first of the pre-created ThunkSections.
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bl tfunc04
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// CHECK1-LABEL: <_start>:
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// CHECK1-NEXT: 100000: bl 0x200000 <tfunc00> @ imm = #0xffffc
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// CHECK1-NEXT: bl 0x500000 <tfunc03> @ imm = #0x3ffff8
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// CHECK1-NEXT: bl 0x400008 <__Thumbv4ABSLongThunk_tfunc04> @ imm = #0x2ffffc
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FUNCTION 00
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// CHECK2-LABEL: <tfunc00>:
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// CHECK2-NEXT: 200000: bx lr
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FUNCTION 01
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// CHECK3-LABEL: <tfunc01>:
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// CHECK3-NEXT: 300000: bx lr
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FUNCTION 02
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bl tfunc07
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/// The thunks should not generate a v7-style short thunk.
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// CHECK4-LABEL: <tfunc02>:
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// CHECK4-NEXT: 400000: bx lr
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// CHECK4-NEXT: bl 0x400018 <__Thumbv4ABSLongThunk_tfunc07> @ imm = #0x12
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// CHECK4-NEXT: bmi 0x3fffb2 <tfunc01+0xfffb2> @ imm = #-0x58
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// CHECK4-EMPTY:
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// CHECK4-NEXT: <__Thumbv4ABSLongThunk_tfunc04>:
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// CHECK4-NEXT: 400008: bx pc
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// CHECK4-NEXT: b 0x400008 <__Thumbv4ABSLongThunk_tfunc04> @ imm = #-0x6
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// CHECK4-NEXT: 40000c: ldr r12, [pc] @ 0x400014 <__Thumbv4ABSLongThunk_tfunc04+0xc>
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// CHECK4-NEXT: bx r12
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// CHECK4-NEXT: 400014: 01 00 60 00 .word 0x00600001
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// CHECK4-EMPTY:
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// CHECK4-NEXT: <__Thumbv4ABSLongThunk_tfunc07>:
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// CHECK4-NEXT: 400018: bx pc
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// CHECK4-NEXT: b 0x400018 <__Thumbv4ABSLongThunk_tfunc07> @ imm = #-0x6
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// CHECK4-NEXT: 40001c: ldr r12, [pc] @ 0x400024 <__Thumbv4ABSLongThunk_tfunc07+0xc>
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// CHECK4-NEXT: bx r12
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// CHECK4-NEXT: 400024: 01 00 90 00 .word 0x00900001
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FUNCTION 03
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FUNCTION 04
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FUNCTION 05
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// CHECK5-LABEL: <tfunc05>:
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// CHECK5-NEXT: 700000: bx lr
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// CHECK5-NEXT: bmi 0x6fffae <tfunc04+0xfffae> @ imm = #-0x58
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// CHECK5-EMPTY:
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// CHECK5-NEXT: <__Thumbv4ABSLongThunk_tfunc03>:
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// CHECK5-NEXT: 700004: bx pc
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// CHECK5-NEXT: b 0x700004 <__Thumbv4ABSLongThunk_tfunc03> @ imm = #-0x6
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// CHECK5-NEXT: 700008: ldr r12, [pc] @ 0x700010 <__Thumbv4ABSLongThunk_tfunc03+0xc>
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// CHECK5-NEXT: bx r12
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// CHECK5-NEXT: 700010: 01 00 50 00 .word 0x00500001
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FUNCTION 06
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/// The backwards branch is within range, so no range extension necessary.
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bl tfunc04
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// CHECK6-LABEL: <tfunc06>:
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// CHECK6-NEXT: 800000: bx lr
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// CHECK6-NEXT: bl 0x600000 <tfunc04> @ imm = #-0x200006
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FUNCTION 07
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/// The backwards branch is out of range.
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bl tfunc03
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// CHECK7-LABEL: <tfunc07>:
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// CHECK7-NEXT: 900000: bx lr
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// CHECK7-NEXT: bl 0x700004 <__Thumbv4ABSLongThunk_tfunc03> @ imm = #-0x200002
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FUNCTION 08
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/// 2nd backwards branch outside of range to same fn. Should share thunk with
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/// previous call.
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bl tfunc03
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// CHECK8-LABEL: <tfunc08>:
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// CHECK8-NEXT: a00000: bx lr
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// CHECK8-NEXT: bl 0x700004 <__Thumbv4ABSLongThunk_tfunc03> @ imm = #-0x300002
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// CHECK8-NEXT: bmi 0x9fffb2 <tfunc07+0xfffb2> @ imm = #-0x58
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// CHECK8-EMPTY:
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// CHECK8-NEXT: <__Thumbv4ABSLongThunk_tfunc03>:
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// CHECK8-NEXT: a00008: bx pc
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// CHECK8-NEXT: a0000a: b 0xa00008 <__Thumbv4ABSLongThunk_tfunc03> @ imm = #-0x6
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// CHECK8-NEXT: a0000c: ldr r12, [pc] @ 0xa00014 <__Thumbv4ABSLongThunk_tfunc03+0xc>
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// CHECK8-NEXT: a00010: bx r12
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// CHECK8-NEXT: a00014: 01 00 50 00 .word 0x00500001
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FUNCTION 09
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/// This call is out of range of ThunkSection at 0700004.
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/// These 3 calls to tfunc03 could have used the same thunk (section), but
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/// we are not that sophisticated.
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bl tfunc03
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// CHECK9-LABEL: <tfunc09>:
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// CHECK9-NEXT: b00000: bx lr
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// CHECK9-NEXT: bl 0xa00008 <__Thumbv4ABSLongThunk_tfunc03> @ imm = #-0xffffe
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FUNCTION 10
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FUNCTION 11
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