@ RUN: llvm-mc %s -triple=armv7-unknown-linux-gnueabi -filetype=obj -o - \
@ RUN: | llvm-readobj -S --sd - | FileCheck %s
@ Check the .save directive
@ The .save directive records the GPR registers which are pushed to the
@ stack. There are 4 different unwind opcodes:
@
@ 0xB100: pop r[3:0]
@ 0xA0: pop r[(4+x):4] @ r[4+x]-r[4] must be consecutive.
@ 0xA8: pop r14, r[(4+x):4] @ r[4+x]-r[4] must be consecutive.
@ 0x8000: pop r[15:4]
@
@ If register list specifed by .save directive is possible to be encoded
@ by 0xA0 or 0xA8, then the assembler should prefer them over 0x8000.
.syntax unified
@-------------------------------------------------------------------------------
@ TEST1
@-------------------------------------------------------------------------------
.section .TEST1
.globl func1a
.align 2
.type func1a,%function
.fnstart
func1a:
.save {r0}
push {r0}
pop {r0}
bx lr
.personality __gxx_personality_v0
.handlerdata
.fnend
.globl func1b
.align 2
.type func1b,%function
.fnstart
func1b:
.save {r0, r1}
push {r0, r1}
pop {r0, r1}
bx lr
.personality __gxx_personality_v0
.handlerdata
.fnend
.globl func1c
.align 2
.type func1c,%function
.fnstart
func1c:
.save {r0, r2}
push {r0, r2}
pop {r0, r2}
bx lr
.personality __gxx_personality_v0
.handlerdata
.fnend
.globl func1d
.align 2
.type func1d,%function
.fnstart
func1d:
.save {r1, r2}
push {r1, r2}
pop {r1, r2}
bx lr
.personality __gxx_personality_v0
.handlerdata
.fnend
.globl func1e
.align 2
.type func1e,%function
.fnstart
func1e:
.save {r0, r1, r2, r3}
push {r0, r1, r2, r3}
pop {r0, r1, r2, r3}
bx lr
.personality __gxx_personality_v0
.handlerdata
.fnend
@-------------------------------------------------------------------------------
@ The assembler should emit 0xB000 unwind opcode.
@-------------------------------------------------------------------------------
@ CHECK: Section {
@ CHECK: Name: .ARM.extab.TEST1
@ CHECK: SectionData (
@ CHECK: 0000: 00000000 B001B100 00000000 B003B100 |................|
@ CHECK: 0010: 00000000 B005B100 00000000 B006B100 |................|
@ CHECK: 0020: 00000000 B00FB100 |........|
@ CHECK: )
@ CHECK: }
@-------------------------------------------------------------------------------
@ TEST2
@-------------------------------------------------------------------------------
.section .TEST2
.globl func2a
.align 2
.type func2a,%function
.fnstart
func2a:
.save {r4}
push {r4}
pop {r4}
bx lr
.personality __gxx_personality_v0
.handlerdata
.fnend
.globl func2b
.align 2
.type func2b,%function
.fnstart
func2b:
.save {r4, r5}
push {r4, r5}
pop {r4, r5}
bx lr
.personality __gxx_personality_v0
.handlerdata
.fnend
.globl func2c
.align 2
.type func2c,%function
.fnstart
func2c:
.save {r4, r5, r6, r7, r8, r9, r10, r11}
push {r4, r5, r6, r7, r8, r9, r10, r11}
pop {r4, r5, r6, r7, r8, r9, r10, r11}
bx lr
.personality __gxx_personality_v0
.handlerdata
.fnend
@-------------------------------------------------------------------------------
@ The assembler should emit 0xA0 unwind opcode.
@-------------------------------------------------------------------------------
@ CHECK: Section {
@ CHECK: Name: .ARM.extab.TEST2
@ CHECK: SectionData (
@ CHECK: 0000: 00000000 B0B0A000 00000000 B0B0A100 |................|
@ CHECK: 0010: 00000000 B0B0A700 |........|
@ CHECK: )
@ CHECK: }
@-------------------------------------------------------------------------------
@ TEST3
@-------------------------------------------------------------------------------
.section .TEST3
.globl func3a
.align 2
.type func3a,%function
.fnstart
func3a:
.save {r4, r14}
push {r4, r14}
pop {r4, r14}
bx lr
.personality __gxx_personality_v0
.handlerdata
.fnend
.globl func3b
.align 2
.type func3b,%function
.fnstart
func3b:
.save {r4, r5, r14}
push {r4, r5, r14}
pop {r4, r5, r14}
bx lr
.personality __gxx_personality_v0
.handlerdata
.fnend
.globl func3c
.align 2
.type func3c,%function
.fnstart
func3c:
.save {r4, r5, r6, r7, r8, r9, r10, r11, r14}
push {r4, r5, r6, r7, r8, r9, r10, r11, r14}
pop {r4, r5, r6, r7, r8, r9, r10, r11, r14}
bx lr
.personality __gxx_personality_v0
.handlerdata
.fnend
@-------------------------------------------------------------------------------
@ The assembler should emit 0xA8 unwind opcode.
@-------------------------------------------------------------------------------
@ CHECK: Section {
@ CHECK: Name: .ARM.extab.TEST3
@ CHECK: SectionData (
@ CHECK: 0000: 00000000 B0B0A800 00000000 B0B0A900 |................|
@ CHECK: 0010: 00000000 B0B0AF00 |........|
@ CHECK: )
@ CHECK: }
@-------------------------------------------------------------------------------
@ TEST4
@-------------------------------------------------------------------------------
.section .TEST4
.globl func4a
.align 2
.type func4a,%function
.fnstart
func4a:
.save {r4, r5, r6, r7, r8, r9, r10, r11, r12, r14}
push {r4, r5, r6, r7, r8, r9, r10, r11, r12, r14}
pop {r4, r5, r6, r7, r8, r9, r10, r11, r12, r14}
bx lr
.personality __gxx_personality_v0
.handlerdata
.fnend
.globl func4b
.align 2
.type func4b,%function
.fnstart
func4b:
@ Note: r7 is missing intentionally.
.save {r4, r5, r6, r8, r9, r10, r11}
push {r4, r5, r6, r8, r9, r10, r11}
pop {r4, r5, r6, r8, r9, r10, r11}
bx lr
.personality __gxx_personality_v0
.handlerdata
.fnend
.globl func4c
.align 2
.type func4c,%function
.fnstart
func4c:
@ Note: r7 is missing intentionally.
.save {r4, r5, r6, r8, r9, r10, r11, r14}
push {r4, r5, r6, r8, r9, r10, r11, r14}
pop {r4, r5, r6, r8, r9, r10, r11, r14}
bx lr
.personality __gxx_personality_v0
.handlerdata
.fnend
.globl func4d
.align 2
.type func4d,%function
.fnstart
func4d:
@ Note: The register list is not start with r4.
.save {r5, r6, r7}
push {r5, r6, r7}
pop {r5, r6, r7}
bx lr
.personality __gxx_personality_v0
.handlerdata
.fnend
.globl func4e
.align 2
.type func4e,%function
.fnstart
func4e:
@ Note: The register list is not start with r4.
.save {r5, r6, r7, r14}
push {r5, r6, r7, r14}
pop {r5, r6, r7, r14}
bx lr
.personality __gxx_personality_v0
.handlerdata
.fnend
@-------------------------------------------------------------------------------
@ The assembler should emit 0x8000 unwind opcode.
@-------------------------------------------------------------------------------
@ CHECK: Section {
@ CHECK: Name: .ARM.extab.TEST4
@ CHECK: SectionData (
@ CHECK: 0000: 00000000 B0FF8500 00000000 B0F78000 |................|
@ CHECK: 0010: 00000000 B0F78400 00000000 B00E8000 |................|
@ CHECK: 0020: 00000000 B00E8400 |........|
@ CHECK: )
@ CHECK: }
@-------------------------------------------------------------------------------
@ TEST5
@-------------------------------------------------------------------------------
.section .TEST5
.globl func5a
.align 2
.type func5a,%function
.fnstart
func5a:
.save {r0, r1, r2, r3, r4, r5, r6}
push {r0, r1, r2, r3, r4, r5, r6}
pop {r0, r1, r2, r3, r4, r5, r6}
bx lr
.personality __gxx_personality_v0
.handlerdata
.fnend
.globl func5b
.align 2
.type func5b,%function
.fnstart
func5b:
.save {r0, r1, r2, r3, r4, r5, r6, r7, r8, r9, r10, r11, r12, r14}
push {r0, r1, r2, r3, r4, r5, r6, r7, r8, r9, r10, r11, r12, r14}
pop {r0, r1, r2, r3, r4, r5, r6, r7, r8, r9, r10, r11, r12, r14}
bx lr
.personality __gxx_personality_v0
.handlerdata
.fnend
@-------------------------------------------------------------------------------
@ Check the order of unwind opcode to pop registers.
@ 0xB10F "pop {r0-r3}" should be emitted before 0xA2 "pop {r4-r6}".
@ 0xB10F "pop {r0-r3}" should be emitted before 0x85FF "pop {r4-r12, r14}".
@-------------------------------------------------------------------------------
@ CHECK: Section {
@ CHECK: Name: .ARM.extab.TEST5
@ CHECK: SectionData (
@ CHECK: 0000: 00000000 A20FB100 00000000 850FB101 |................|
@ CHECK: 0010: B0B0B0FF |....|
@ CHECK: )
@ CHECK: }
Codebase Browser
llvm