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# The file testing Nop insertion with R_RISCV_ALIGN for relaxation.
# Relaxation enabled:
# RUN: llvm-mc -filetype=obj -triple riscv32 -mattr=+relax < %s \
# RUN: | llvm-objdump -d -M no-aliases - \
# RUN: | FileCheck -check-prefix=RELAX-INST %s
# RUN: llvm-mc -filetype=obj -triple riscv32 -mattr=+relax < %s \
# RUN: | llvm-readobj -r - | FileCheck -check-prefix=RELAX-RELOC %s
# Relaxation disabled:
# RUN: llvm-mc -filetype=obj -triple riscv32 -mattr=-relax < %s \
# RUN: | llvm-objdump -d -M no-aliases - \
# RUN: | FileCheck -check-prefix=NORELAX-INST %s
# RUN: llvm-mc -filetype=obj -triple riscv32 -mattr=-relax < %s \
# RUN: | llvm-readobj -r - | FileCheck -check-prefix=NORELAX-RELOC %s
# Relaxation enabled with C extension:
# RUN: llvm-mc -filetype=obj -triple riscv32 -mattr=+c,+relax < %s \
# RUN: | llvm-objdump -d -M no-aliases - \
# RUN: | FileCheck -check-prefix=C-EXT-RELAX-INST %s
# RUN: llvm-mc -filetype=obj -triple riscv32 -mattr=+c,+relax < %s \
# RUN: | llvm-readobj -r - | FileCheck -check-prefix=C-EXT-RELAX-RELOC %s
# Relaxation disabled with C extension:
# RUN: llvm-mc -filetype=obj -triple riscv32 -mattr=+c,-relax < %s \
# RUN: | llvm-objdump -d -M no-aliases - \
# RUN: | FileCheck -check-prefix=C-EXT-NORELAX-INST %s
# RUN: llvm-mc -filetype=obj -triple riscv32 -mattr=+c,-relax < %s \
# RUN: | llvm-readobj -r - | FileCheck -check-prefix=C-EXT-NORELAX-RELOC %s
# We need to insert N-MinNopSize bytes NOPs and R_RISCV_ALIGN relocation
# type for .align N directive when linker relaxation enabled.
# Linker could satisfy alignment by removing NOPs after linker relaxation.
# The first R_RISCV_ALIGN come from
# MCELFStreamer::InitSections() emitCodeAlignment(getTextSectionAligntment()).
# C-EXT-RELAX-RELOC: R_RISCV_ALIGN - 0x2
# C-EXT-RELAX-INST: c.nop
test:
.p2align 2
# If the +c extension is enabled, the text section will be 2-byte aligned, so
# one c.nop instruction is sufficient.
# C-EXT-RELAX-RELOC-NOT: R_RISCV_ALIGN - 0x2
# C-EXT-RELAX-INST-NOT: c.nop
bne zero, a0, .LBB0_2
mv a0, zero
.p2align 3
# RELAX-RELOC: R_RISCV_ALIGN - 0x4
# RELAX-INST: addi zero, zero, 0
# C-EXT-RELAX-RELOC: R_RISCV_ALIGN - 0x6
# C-EXT-RELAX-INST: addi zero, zero, 0
# C-EXT-RELAX-INST: c.nop
# C-EXT-NORELAX-INST: addi zero, zero, 0
add a0, a0, a1
.align 4
.LBB0_2:
# RELAX-RELOC: R_RISCV_ALIGN - 0xC
# RELAX-INST: addi zero, zero, 0
# RELAX-INST: addi zero, zero, 0
# RELAX-INST: addi zero, zero, 0
# NORELAX-INST: addi zero, zero, 0
# C-EXT-RELAX-RELOC: R_RISCV_ALIGN - 0xE
# C-EXT-RELAX-INST: addi zero, zero, 0
# C-EXT-RELAX-INST: addi zero, zero, 0
# C-EXT-RELAX-INST: addi zero, zero, 0
# C-EXT-RELAX-INST: c.nop
# C-EXT-INST: addi zero, zero, 0
# C-EXT-INST: c.nop
add a0, a0, a1
.p2align 3
.constant_pool:
.long 3126770193
# RELAX-RELOC: R_RISCV_ALIGN - 0x4
# RELAX-INST: addi zero, zero, 0
# NORELAX-INST: addi zero, zero, 0
# C-EXT-RELAX-RELOC: R_RISCV_ALIGN - 0x6
# C-EXT-RELAX-INST: addi zero, zero, 0
# C-EXT-RELAX-INST: c.nop
# C-EXT-INST: addi zero, zero, 0
# C-EXT-INST: c.nop
add a0, a0, a1
# Alignment directive with specific padding value 0x01.
# We will not emit R_RISCV_ALIGN in this case.
# The behavior is the same as GNU assembler.
.p2align 4, 1
# RELAX-RELOC-NOT: R_RISCV_ALIGN - 0xC
# RELAX-INST: 01 01
# RELAX-INST: 01 01
# C-EXT-RELAX-RELOC-NOT: R_RISCV_ALIGN - 0xE
# C-EXT-RELAX-INST: 01 01
# C-EXT-INST: 01 01
ret
# NORELAX-RELOC-NOT: R_RISCV
# C-EXT-NORELAX-RELOC-NOT: R_RISCV
# Code alignment of a byte size less than the size of a nop must be treated
# as no alignment. This used to trigger a fatal error with relaxation enabled
# as the calculation to emit the worst-case sequence of nops would overflow.
.p2align 1
add a0, a0, a1
.p2align 0
add a0, a0, a1
# We only need to insert R_RISCV_ALIGN for code section
# when the linker relaxation enabled.
.data
.p2align 3
# RELAX-RELOC-NOT: R_RISCV_ALIGN
# C-EXT-RELAX-RELOC-NOT: R_RISCV_ALIGN
data1:
.word 7
.p2align 4
# RELAX-RELOC-NOT: R_RISCV_ALIGN
# C-EXT-RELAX-RELOC-NOT: R_RISCV_ALIGN
data2:
.word 9
# Check that the initial alignment is properly handled when using .option to
# disable the C extension. This used to crash.
# C-EXT-RELAX-INST: <.text2>:
# C-EXT-RELAX-INST-NEXT: add a0, a0, a1
.section .text2, "x"
.option norvc
.balign 4
add a0, a0, a1
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