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llvm-mirror/test/MC/ARM/eh-directive-save.s

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Implement AsmParser for ARM unwind directives. This commit implements the AsmParser for fnstart, fnend, cantunwind, personality, handlerdata, pad, setfp, save, and vsave directives. This commit fixes some minor issue in the ARMELFStreamer: * The switch back to corresponding section after the .fnend directive. * Emit the unwind opcode while processing .fnend directive if there is no .handlerdata directive. * Emit the unwind opcode to .ARM.extab while processing .handlerdata even if .personality directive does not exist. llvm-svn: 181603
2013-05-10 18:17:24 +02:00
@ 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: }
Fix ARM unwind opcode assembler in several cases. Changes to ARM unwind opcode assembler: * Fix multiple .save or .vsave directives. Besides, the order is preserved now. * For the directives which will generate multiple opcodes, such as ".save {r0-r11}", the order of the unwind opcode is fixed now, i.e. the registers with less encoding value are popped first. * Fix the $sp offset calculation. Now, we can use the .setfp, .pad, .save, and .vsave directives at any order. Changes to test cases: * Add test cases to check the order of multiple opcodes for the .save directive. * Fix the incorrect $sp offset in the test case. The stack pointer offset specified in the test case was incorrect. (Changed test cases: ehabi-mc-section.ll and ehabi-mc.ll) * The opcode to restore $sp are slightly reordered. The behavior are not changed, and the new output is same as the output of GNU as. (Changed test cases: eh-directive-pad.s and eh-directive-setfp.s) llvm-svn: 183627
2013-06-09 14:22:30 +02:00
@-------------------------------------------------------------------------------
@ 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: }
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