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llvm-project/lld/test/ELF/arm-thumb-condbranch-thunk.s

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[ELF] Add support for multiple passes to createThunks() This change allows Thunks to be added on multiple passes. To do this we must merge only the thunks added in each pass, and deal with thunks that have drifted out of range of their callers. A thunk may end out of range of its caller if enough thunks are added in between the caller and the thunk. To handle this we create another thunk. Differential Revision: https://reviews.llvm.org/D34692 llvm-svn: 316754
2017-10-27 17:07:10 +08:00
// REQUIRES: arm
[ELF] Add support for older Arm Architectures with smaller branch range The Thumb BL and BLX instructions on older Arm Architectures such as v5 and v6 have a constrained encoding J1 and J2 must equal 1, later Architectures relaxed this restriction allowing J1 and J2 to be used to calculate a larger immediate. This patch adds support for the old encoding, it is used when the build attributes for the input objects only contain older architectures. Differential Revision: https://reviews.llvm.org/D50076 llvm-svn: 340159
2018-08-20 17:19:30 +08:00
// RUN: llvm-mc -arm-add-build-attributes -filetype=obj -triple=thumbv7a-none-linux-gnueabi %s -o %t
[ELF] Add support for multiple passes to createThunks() This change allows Thunks to be added on multiple passes. To do this we must merge only the thunks added in each pass, and deal with thunks that have drifted out of range of their callers. A thunk may end out of range of its caller if enough thunks are added in between the caller and the thunk. To handle this we create another thunk. Differential Revision: https://reviews.llvm.org/D34692 llvm-svn: 316754
2017-10-27 17:07:10 +08:00
// RUN: ld.lld %t -o %t2 2>&1
// The output file is large, most of it zeroes. We dissassemble only the
// parts we need to speed up the test and avoid a large output file
// RUN: llvm-objdump -d %t2 -start-address=524288 -stop-address=524316 -triple=thumbv7a-linux-gnueabihf | FileCheck -check-prefix=CHECK1 %s
// RUN: llvm-objdump -d %t2 -start-address=1048576 -stop-address=1048584 -triple=thumbv7a-linux-gnueabihf | FileCheck -check-prefix=CHECK2 %s
// RUN: llvm-objdump -d %t2 -start-address=1572864 -stop-address=1572872 -triple=thumbv7a-linux-gnueabihf | FileCheck -check-prefix=CHECK3 %s
// RUN: llvm-objdump -d %t2 -start-address=5242884 -stop-address=5242894 -triple=thumbv7a-linux-gnueabihf | FileCheck -check-prefix=CHECK4 %s
// RUN: llvm-objdump -d %t2 -start-address=5767168 -stop-address=5767174 -triple=thumbv7a-linux-gnueabihf | FileCheck -check-prefix=CHECK5 %s
// RUN: llvm-objdump -d %t2 -start-address=16777220 -stop-address=16777240 -triple=thumbv7a-linux-gnueabihf | FileCheck -check-prefix=CHECK6 %s
// RUN: llvm-objdump -d %t2 -start-address=17825792 -stop-address=17825798 -triple=thumbv7a-linux-gnueabihf | FileCheck -check-prefix=CHECK7 %s
// Test Range extension Thunks for the Thumb conditional branch instruction.
// This instruction only has a range of 1Mb whereas all the other Thumb wide
// Branch instructions have 16Mb range. We still place our pre-created Thunk
// Sections at 16Mb intervals as conditional branches to a target defined
// in a different section are rare.
.syntax unified
// Define a function aligned on a half megabyte boundary
.macro FUNCTION suff
.section .text.\suff\(), "ax", %progbits
.thumb
.balign 0x80000
.globl tfunc\suff\()
.type tfunc\suff\(), %function
tfunc\suff\():
bx lr
.endm
.globl _start
_start:
FUNCTION 00
// Long Range Thunk needed for 16Mb range branch, can reach pre-created Thunk
// Section
bl tfunc33
// CHECK1: Disassembly of section .text:
// CHECK1-NEXT: tfunc00:
// CHECK1-NEXT: 80000: 70 47 bx lr
// CHECK1-NEXT: 80002: 7f f3 ff d7 bl #16252926
// CHECK1: __Thumbv7ABSLongThunk_tfunc05:
ELF: Add support for short thunks on ARM. A short thunk uses a direct branch (b or b.w) instruction, and is used when the target has the same thumbness as the thunk and is within direct branch range (32MB for ARM, 16MB for Thumb-2). Reduces the size of Chromium for Android's .text section by around 160KB. Differential Revision: https://reviews.llvm.org/D44963 llvm-svn: 328846
2018-03-30 06:43:52 +08:00
// CHECK1-NEXT: 80008: 7f f2 fa bf b.w #2621428 <tfunc05>
[ELF] Add support for multiple passes to createThunks() This change allows Thunks to be added on multiple passes. To do this we must merge only the thunks added in each pass, and deal with thunks that have drifted out of range of their callers. A thunk may end out of range of its caller if enough thunks are added in between the caller and the thunk. To handle this we create another thunk. Differential Revision: https://reviews.llvm.org/D34692 llvm-svn: 316754
2017-10-27 17:07:10 +08:00
// CHECK1: __Thumbv7ABSLongThunk_tfunc00:
ELF: Add support for short thunks on ARM. A short thunk uses a direct branch (b or b.w) instruction, and is used when the target has the same thumbness as the thunk and is within direct branch range (32MB for ARM, 16MB for Thumb-2). Reduces the size of Chromium for Android's .text section by around 160KB. Differential Revision: https://reviews.llvm.org/D44963 llvm-svn: 328846
2018-03-30 06:43:52 +08:00
// CHECK1-NEXT: 8000c: ff f7 f8 bf b.w #-16 <tfunc00>
[ELF] Add support for multiple passes to createThunks() This change allows Thunks to be added on multiple passes. To do this we must merge only the thunks added in each pass, and deal with thunks that have drifted out of range of their callers. A thunk may end out of range of its caller if enough thunks are added in between the caller and the thunk. To handle this we create another thunk. Differential Revision: https://reviews.llvm.org/D34692 llvm-svn: 316754
2017-10-27 17:07:10 +08:00
FUNCTION 01
// tfunc02 is within range of tfunc02
beq.w tfunc02
// tfunc05 is out of range, and we can't reach the pre-created Thunk Section
// create a new one.
bne.w tfunc05
// CHECK2: tfunc01:
// CHECK2-NEXT: 100000: 70 47 bx lr
// CHECK2-NEXT: 100002: 3f f0 fd a7 beq.w #524282 <tfunc02>
// CHECK2-NEXT: 100006: 7f f4 ff a7 bne.w #-524290 <__Thumbv7ABSLongThunk_tfunc05>
FUNCTION 02
// We can reach the Thunk Section created for bne.w tfunc05
bne.w tfunc05
beq.w tfunc00
// CHECK3: 180000: 70 47 bx lr
// CHECK3-NEXT: 180002: 40 f4 01 80 bne.w #-1048574 <__Thumbv7ABSLongThunk_tfunc05>
ELF: Add support for short thunks on ARM. A short thunk uses a direct branch (b or b.w) instruction, and is used when the target has the same thumbness as the thunk and is within direct branch range (32MB for ARM, 16MB for Thumb-2). Reduces the size of Chromium for Android's .text section by around 160KB. Differential Revision: https://reviews.llvm.org/D44963 llvm-svn: 328846
2018-03-30 06:43:52 +08:00
// CHECK3-NEXT: 180006: 00 f4 01 80 beq.w #-1048574 <__Thumbv7ABSLongThunk_tfunc00>
[ELF] Add support for multiple passes to createThunks() This change allows Thunks to be added on multiple passes. To do this we must merge only the thunks added in each pass, and deal with thunks that have drifted out of range of their callers. A thunk may end out of range of its caller if enough thunks are added in between the caller and the thunk. To handle this we create another thunk. Differential Revision: https://reviews.llvm.org/D34692 llvm-svn: 316754
2017-10-27 17:07:10 +08:00
FUNCTION 03
FUNCTION 04
FUNCTION 05
FUNCTION 06
FUNCTION 07
FUNCTION 08
FUNCTION 09
// CHECK4: __Thumbv7ABSLongThunk_tfunc03:
ELF: Add support for short thunks on ARM. A short thunk uses a direct branch (b or b.w) instruction, and is used when the target has the same thumbness as the thunk and is within direct branch range (32MB for ARM, 16MB for Thumb-2). Reduces the size of Chromium for Android's .text section by around 160KB. Differential Revision: https://reviews.llvm.org/D44963 llvm-svn: 328846
2018-03-30 06:43:52 +08:00
// CHECK4-NEXT: 500004: ff f4 fc bf b.w #-3145736 <tfunc03>
[ELF] Add support for multiple passes to createThunks() This change allows Thunks to be added on multiple passes. To do this we must merge only the thunks added in each pass, and deal with thunks that have drifted out of range of their callers. A thunk may end out of range of its caller if enough thunks are added in between the caller and the thunk. To handle this we create another thunk. Differential Revision: https://reviews.llvm.org/D34692 llvm-svn: 316754
2017-10-27 17:07:10 +08:00
FUNCTION 10
// We can't reach any Thunk Section, create a new one
beq.w tfunc03
// CHECK5: tfunc10:
// CHECK5-NEXT: 580000: 70 47 bx lr
// CHECK5-NEXT: 580002: 3f f4 ff a7 beq.w #-524290 <__Thumbv7ABSLongThunk_tfunc03>
FUNCTION 11
FUNCTION 12
FUNCTION 13
FUNCTION 14
FUNCTION 15
FUNCTION 16
FUNCTION 17
FUNCTION 18
FUNCTION 19
FUNCTION 20
FUNCTION 21
FUNCTION 22
FUNCTION 23
FUNCTION 24
FUNCTION 25
FUNCTION 26
FUNCTION 27
FUNCTION 28
FUNCTION 29
FUNCTION 30
FUNCTION 31
// CHECK6: __Thumbv7ABSLongThunk_tfunc33:
ELF: Add support for short thunks on ARM. A short thunk uses a direct branch (b or b.w) instruction, and is used when the target has the same thumbness as the thunk and is within direct branch range (32MB for ARM, 16MB for Thumb-2). Reduces the size of Chromium for Android's .text section by around 160KB. Differential Revision: https://reviews.llvm.org/D44963 llvm-svn: 328846
2018-03-30 06:43:52 +08:00
// CHECK6-NEXT: 1000004: ff f0 fc bf b.w #1048568 <tfunc33>
[ELF] Add support for multiple passes to createThunks() This change allows Thunks to be added on multiple passes. To do this we must merge only the thunks added in each pass, and deal with thunks that have drifted out of range of their callers. A thunk may end out of range of its caller if enough thunks are added in between the caller and the thunk. To handle this we create another thunk. Differential Revision: https://reviews.llvm.org/D34692 llvm-svn: 316754
2017-10-27 17:07:10 +08:00
// CHECK6: __Thumbv7ABSLongThunk_tfunc00:
ELF: Add support for short thunks on ARM. A short thunk uses a direct branch (b or b.w) instruction, and is used when the target has the same thumbness as the thunk and is within direct branch range (32MB for ARM, 16MB for Thumb-2). Reduces the size of Chromium for Android's .text section by around 160KB. Differential Revision: https://reviews.llvm.org/D44963 llvm-svn: 328846
2018-03-30 06:43:52 +08:00
// CHECK6-NEXT: 1000008: 7f f4 fa 97 b.w #-16252940 <tfunc00>
[ELF] Add support for multiple passes to createThunks() This change allows Thunks to be added on multiple passes. To do this we must merge only the thunks added in each pass, and deal with thunks that have drifted out of range of their callers. A thunk may end out of range of its caller if enough thunks are added in between the caller and the thunk. To handle this we create another thunk. Differential Revision: https://reviews.llvm.org/D34692 llvm-svn: 316754
2017-10-27 17:07:10 +08:00
FUNCTION 32
FUNCTION 33
// We should be able to reach an existing ThunkSection.
b.w tfunc00
// CHECK7: tfunc33:
// CHECK7-NEXT: 1100000: 70 47 bx lr
ELF: Add support for short thunks on ARM. A short thunk uses a direct branch (b or b.w) instruction, and is used when the target has the same thumbness as the thunk and is within direct branch range (32MB for ARM, 16MB for Thumb-2). Reduces the size of Chromium for Android's .text section by around 160KB. Differential Revision: https://reviews.llvm.org/D44963 llvm-svn: 328846
2018-03-30 06:43:52 +08:00
// CHECK7-NEXT: 1100002: 00 f7 01 b8 b.w #-1048574 <__Thumbv7ABSLongThunk_tfunc00>