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llvm-mirror/test/MC/RISCV/align.s

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[RISCV] Insert R_RISCV_ALIGN relocation type and Nops for code alignment when linker relaxation enabled Linker relaxation may change code size. We need to fix up the alignment of alignment directive in text section by inserting Nops and R_RISCV_ALIGN relocation type. So then linker could satisfy the alignment by removing Nops. To do this: 1. Add shouldInsertExtraNopBytesForCodeAlign target hook to calculate the Nops we need to insert. 2. Add shouldInsertFixupForCodeAlign target hook to insert R_RISCV_ALIGN fixup type. Differential Revision: https://reviews.llvm.org/D47755 llvm-svn: 352616
2019-01-30 12:16:59 +01:00
# The file testing Nop insertion with R_RISCV_ALIGN for relaxation.
# Relaxation enabled:
# RUN: llvm-mc -filetype=obj -triple riscv32 -mattr=+relax < %s \
[RISCV] Support llvm-objdump -M no-aliases and -M numeric Summary: Now that llvm-objdump allows target-specific options, we match the `no-aliases` and `numeric` options for RISC-V, as supported by GNU objdump. This is done by overriding the variables used for the command-line options, so that the command-line options are still supported. This patch updates all tests using `llvm-objdump -riscv-no-aliases` to use `llvm-objdump -M no-aliases`. Reviewers: luismarques, asb Reviewed By: luismarques, asb Subscribers: pzheng, hiraditya, rbar, johnrusso, simoncook, apazos, sabuasal, niosHD, kito-cheng, shiva0217, jrtc27, MaskRay, zzheng, edward-jones, rogfer01, MartinMosbeck, brucehoult, the_o, rkruppe, PkmX, jocewei, psnobl, benna, Jim, s.egerton, llvm-commits Tags: #llvm Differential Revision: https://reviews.llvm.org/D66139 llvm-svn: 371534
2019-09-10 18:24:03 +02:00
# RUN: | llvm-objdump -d -M no-aliases - \
[RISCV] Insert R_RISCV_ALIGN relocation type and Nops for code alignment when linker relaxation enabled Linker relaxation may change code size. We need to fix up the alignment of alignment directive in text section by inserting Nops and R_RISCV_ALIGN relocation type. So then linker could satisfy the alignment by removing Nops. To do this: 1. Add shouldInsertExtraNopBytesForCodeAlign target hook to calculate the Nops we need to insert. 2. Add shouldInsertFixupForCodeAlign target hook to insert R_RISCV_ALIGN fixup type. Differential Revision: https://reviews.llvm.org/D47755 llvm-svn: 352616
2019-01-30 12:16:59 +01:00
# 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 \
[RISCV] Support llvm-objdump -M no-aliases and -M numeric Summary: Now that llvm-objdump allows target-specific options, we match the `no-aliases` and `numeric` options for RISC-V, as supported by GNU objdump. This is done by overriding the variables used for the command-line options, so that the command-line options are still supported. This patch updates all tests using `llvm-objdump -riscv-no-aliases` to use `llvm-objdump -M no-aliases`. Reviewers: luismarques, asb Reviewed By: luismarques, asb Subscribers: pzheng, hiraditya, rbar, johnrusso, simoncook, apazos, sabuasal, niosHD, kito-cheng, shiva0217, jrtc27, MaskRay, zzheng, edward-jones, rogfer01, MartinMosbeck, brucehoult, the_o, rkruppe, PkmX, jocewei, psnobl, benna, Jim, s.egerton, llvm-commits Tags: #llvm Differential Revision: https://reviews.llvm.org/D66139 llvm-svn: 371534
2019-09-10 18:24:03 +02:00
# RUN: | llvm-objdump -d -M no-aliases - \
[RISCV] Insert R_RISCV_ALIGN relocation type and Nops for code alignment when linker relaxation enabled Linker relaxation may change code size. We need to fix up the alignment of alignment directive in text section by inserting Nops and R_RISCV_ALIGN relocation type. So then linker could satisfy the alignment by removing Nops. To do this: 1. Add shouldInsertExtraNopBytesForCodeAlign target hook to calculate the Nops we need to insert. 2. Add shouldInsertFixupForCodeAlign target hook to insert R_RISCV_ALIGN fixup type. Differential Revision: https://reviews.llvm.org/D47755 llvm-svn: 352616
2019-01-30 12:16:59 +01:00
# 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 \
[RISCV] Support llvm-objdump -M no-aliases and -M numeric Summary: Now that llvm-objdump allows target-specific options, we match the `no-aliases` and `numeric` options for RISC-V, as supported by GNU objdump. This is done by overriding the variables used for the command-line options, so that the command-line options are still supported. This patch updates all tests using `llvm-objdump -riscv-no-aliases` to use `llvm-objdump -M no-aliases`. Reviewers: luismarques, asb Reviewed By: luismarques, asb Subscribers: pzheng, hiraditya, rbar, johnrusso, simoncook, apazos, sabuasal, niosHD, kito-cheng, shiva0217, jrtc27, MaskRay, zzheng, edward-jones, rogfer01, MartinMosbeck, brucehoult, the_o, rkruppe, PkmX, jocewei, psnobl, benna, Jim, s.egerton, llvm-commits Tags: #llvm Differential Revision: https://reviews.llvm.org/D66139 llvm-svn: 371534
2019-09-10 18:24:03 +02:00
# RUN: | llvm-objdump -d -M no-aliases - \
[RISCV] Insert R_RISCV_ALIGN relocation type and Nops for code alignment when linker relaxation enabled Linker relaxation may change code size. We need to fix up the alignment of alignment directive in text section by inserting Nops and R_RISCV_ALIGN relocation type. So then linker could satisfy the alignment by removing Nops. To do this: 1. Add shouldInsertExtraNopBytesForCodeAlign target hook to calculate the Nops we need to insert. 2. Add shouldInsertFixupForCodeAlign target hook to insert R_RISCV_ALIGN fixup type. Differential Revision: https://reviews.llvm.org/D47755 llvm-svn: 352616
2019-01-30 12:16:59 +01:00
# 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 \
[RISCV] Support llvm-objdump -M no-aliases and -M numeric Summary: Now that llvm-objdump allows target-specific options, we match the `no-aliases` and `numeric` options for RISC-V, as supported by GNU objdump. This is done by overriding the variables used for the command-line options, so that the command-line options are still supported. This patch updates all tests using `llvm-objdump -riscv-no-aliases` to use `llvm-objdump -M no-aliases`. Reviewers: luismarques, asb Reviewed By: luismarques, asb Subscribers: pzheng, hiraditya, rbar, johnrusso, simoncook, apazos, sabuasal, niosHD, kito-cheng, shiva0217, jrtc27, MaskRay, zzheng, edward-jones, rogfer01, MartinMosbeck, brucehoult, the_o, rkruppe, PkmX, jocewei, psnobl, benna, Jim, s.egerton, llvm-commits Tags: #llvm Differential Revision: https://reviews.llvm.org/D66139 llvm-svn: 371534
2019-09-10 18:24:03 +02:00
# RUN: | llvm-objdump -d -M no-aliases - \
[RISCV] Insert R_RISCV_ALIGN relocation type and Nops for code alignment when linker relaxation enabled Linker relaxation may change code size. We need to fix up the alignment of alignment directive in text section by inserting Nops and R_RISCV_ALIGN relocation type. So then linker could satisfy the alignment by removing Nops. To do this: 1. Add shouldInsertExtraNopBytesForCodeAlign target hook to calculate the Nops we need to insert. 2. Add shouldInsertFixupForCodeAlign target hook to insert R_RISCV_ALIGN fixup type. Differential Revision: https://reviews.llvm.org/D47755 llvm-svn: 352616
2019-01-30 12:16:59 +01:00
# 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
[MC] De-capitalize another set of MCStreamer::Emit* functions Emit{ValueTo,Code}Alignment Emit{DTP,TP,GP}* EmitSymbolValue etc
2020-02-15 04:21:58 +01:00
# MCELFStreamer::InitSections() emitCodeAlignment(4).
[RISCV] Insert R_RISCV_ALIGN relocation type and Nops for code alignment when linker relaxation enabled Linker relaxation may change code size. We need to fix up the alignment of alignment directive in text section by inserting Nops and R_RISCV_ALIGN relocation type. So then linker could satisfy the alignment by removing Nops. To do this: 1. Add shouldInsertExtraNopBytesForCodeAlign target hook to calculate the Nops we need to insert. 2. Add shouldInsertFixupForCodeAlign target hook to insert R_RISCV_ALIGN fixup type. Differential Revision: https://reviews.llvm.org/D47755 llvm-svn: 352616
2019-01-30 12:16:59 +01:00
# 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
[RISCV] Avoid overflow when determining number of nops for code align RISCVAsmBackend::shouldInsertExtraNopBytesForCodeAlign() assumed that the align specified would be greater than or equal to the minimum nop length, but that is not always the case - for example if a user specifies ".align 0" in assembly. Differential Revision: https://reviews.llvm.org/D63274 Patch by Edward Jones. llvm-svn: 366176
2019-07-16 06:40:25 +02:00
# 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
[RISCV] Insert R_RISCV_ALIGN relocation type and Nops for code alignment when linker relaxation enabled Linker relaxation may change code size. We need to fix up the alignment of alignment directive in text section by inserting Nops and R_RISCV_ALIGN relocation type. So then linker could satisfy the alignment by removing Nops. To do this: 1. Add shouldInsertExtraNopBytesForCodeAlign target hook to calculate the Nops we need to insert. 2. Add shouldInsertFixupForCodeAlign target hook to insert R_RISCV_ALIGN fixup type. Differential Revision: https://reviews.llvm.org/D47755 llvm-svn: 352616
2019-01-30 12:16:59 +01:00
# 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
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