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llvm-project/lld/test/ELF/arm-thunk-largesection.s

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[ELF] Introduce range extension thunks for ARM This change adds initial support for range extension thunks. All thunks must be created within the first pass so some corner cases are not supported. A follow up patch will add support for multiple passes. With this change the existing tests arm-branch-error.s and arm-thumb-branch-error.s now no longer fail with an out of range branch. These have been renamed and tests added for the range extension thunk. Differential Revision: https://reviews.llvm.org/D34691 llvm-svn: 316752
2017-10-27 17:04:11 +08:00
// RUN: llvm-mc -filetype=obj -triple=thumbv7a-none-linux-gnueabi %s -o %t
// RUN: ld.lld %t -o %t2 2>&1
// RUN: llvm-objdump -d -triple=thumbv7a-none-linux-gnueabi -start-address=69632 -stop-address=69636 %t2 | FileCheck -check-prefix=CHECK1 %s
// RUN: llvm-objdump -d -triple=thumbv7a-none-linux-gnueabi -start-address=73732 -stop-address=73742 %t2 | FileCheck -check-prefix=CHECK2 %s
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
// RUN: llvm-objdump -d -triple=thumbv7a-none-linux-gnueabi -start-address=16850936 -stop-address=16850940 %t2 | FileCheck -check-prefix=CHECK3 %s
// RUN: llvm-objdump -d -triple=thumbv7a-none-linux-gnueabi -start-address=33628152 -stop-address=33628156 %t2 | FileCheck -check-prefix=CHECK4 %s
// RUN: llvm-objdump -d -triple=thumbv7a-none-linux-gnueabi -start-address=50405356 -stop-address=50405376 %t2 | FileCheck -check-prefix=CHECK5 %s
[ELF] Introduce range extension thunks for ARM This change adds initial support for range extension thunks. All thunks must be created within the first pass so some corner cases are not supported. A follow up patch will add support for multiple passes. With this change the existing tests arm-branch-error.s and arm-thumb-branch-error.s now no longer fail with an out of range branch. These have been renamed and tests added for the range extension thunk. Differential Revision: https://reviews.llvm.org/D34691 llvm-svn: 316752
2017-10-27 17:04:11 +08:00
// REQUIRES: arm
.syntax unified
.balign 0x1000
.thumb
.text
.globl _start
.type _start, %function
_start:
bx lr
.space 0x1000
// CHECK1: Disassembly of section .text:
// CHECK1-NEXT: _start:
// CHECK1-NEXT: 11000: 70 47 bx lr
// CHECK1-NEXT: 11002: 00 00 movs r0, r0
// CHECK2: __Thumbv7ABSLongThunk__start:
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
// CHECK2-NEXT: 12004: fe f7 fc bf b.w #-4104 <_start>
[ELF] Introduce range extension thunks for ARM This change adds initial support for range extension thunks. All thunks must be created within the first pass so some corner cases are not supported. A follow up patch will add support for multiple passes. With this change the existing tests arm-branch-error.s and arm-thumb-branch-error.s now no longer fail with an out of range branch. These have been renamed and tests added for the range extension thunk. Differential Revision: https://reviews.llvm.org/D34691 llvm-svn: 316752
2017-10-27 17:04:11 +08:00
// Gigantic section where we need a ThunkSection either side of it
.section .text.large1, "ax", %progbits
.balign 4
.space (16 * 1024 * 1024) - 16
bl _start
.space (16 * 1024 * 1024) - 4
bl _start
.space (16 * 1024 * 1024) - 16
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: 1011ff8: 00 f4 04 d0 bl #-16777208
// CHECK4: 2011ff8: ff f3 f8 d7 bl #16777200
[ELF] Introduce range extension thunks for ARM This change adds initial support for range extension thunks. All thunks must be created within the first pass so some corner cases are not supported. A follow up patch will add support for multiple passes. With this change the existing tests arm-branch-error.s and arm-thumb-branch-error.s now no longer fail with an out of range branch. These have been renamed and tests added for the range extension thunk. Differential Revision: https://reviews.llvm.org/D34691 llvm-svn: 316752
2017-10-27 17:04:11 +08:00
// CHECK5: __Thumbv7ABSLongThunk__start:
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
// CHECK5-NEXT: 3011fec: 41 f2 01 0c movw r12, #4097
// CHECK5-NEXT: 3011ff0: c0 f2 01 0c movt r12, #1
// CHECK5-NEXT: 3011ff4: 60 47 bx r12