| # 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(4). |
| # C-EXT-RELAX-RELOC: R_RISCV_ALIGN - 0x2 |
| # C-EXT-RELAX-INST: c.nop |
| test: |
| .p2align 2 |
| # C-EXT-RELAX-RELOC: R_RISCV_ALIGN - 0x2 |
| # C-EXT-RELAX-INST: 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 |
