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llvm-project/llvm/test/MC/RISCV/rv64-relaxation.s

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[RISCV] Implement MC relaxations for compressed instructions. Summary: This patch implements relaxation for RISCV in the MC layer. The following relaxations are currently handled: 1) Relax C_BEQZ to BEQ and C_BNEZ to BNEZ in RISCV. 2) Relax and C_J $imm to JAL x0, $imm and CJAL to JAL ra, $imm. Reviewers: asb, llvm-commits, efriedma Reviewed By: asb Subscribers: shiva0217 Differential Revision: https://reviews.llvm.org/D43055 llvm-svn: 326626
2018-03-03 06:04:12 +08:00
# RUN: llvm-mc -filetype=obj -triple riscv64 -mattr=+c < %s \
# RUN: | llvm-objdump -d - | FileCheck -check-prefix=INSTR %s
FAR_JUMP_NEGATIVE:
c.nop
.space 2000
FAR_BRANCH_NEGATIVE:
c.nop
.space 256
NEAR_NEGATIVE:
c.nop
start:
c.bnez a0, NEAR
#INSTR: c.bnez a0, 56
c.bnez a0, NEAR_NEGATIVE
#INSTR: c.bnez a0, -4
c.bnez a0, FAR_BRANCH
#INSTR-NEXT: bnez a0, 310
c.bnez a0, FAR_BRANCH_NEGATIVE
#INSTR-NEXT: bnez a0, -268
c.bnez a0, FAR_JUMP
#INSTR-NEXT: bnez a0, 2304
c.bnez a0, FAR_JUMP_NEGATIVE
#INSTR-NEXT: bnez a0, -2278
c.beqz a0, NEAR
#INSTR-NEXT: c.beqz a0, 36
c.beqz a0, NEAR_NEGATIVE
#INSTR-NEXT: c.beqz a0, -24
c.beqz a0, FAR_BRANCH
#INSTR-NEXT: beqz a0, 290
c.beqz a0, FAR_BRANCH_NEGATIVE
#INSTR-NEXT: beqz a0, -288
c.beqz a0, FAR_JUMP
#INSTR-NEXT: beqz a0, 2284
c.beqz a0, FAR_JUMP_NEGATIVE
#INSTR-NEXT: beqz a0, -2298
c.j NEAR
#INSTR-NEXT: c.j 16
c.j NEAR_NEGATIVE
#INSTR-NEXT: c.j -44
c.j FAR_BRANCH
#INSTR-NEXT: c.j 270
c.j FAR_BRANCH_NEGATIVE
#INSTR-NEXT: c.j -306
c.j FAR_JUMP
#INSTR-NEXT: j 2268
c.j FAR_JUMP_NEGATIVE
#INSTR-NEXT: j -2314
NEAR:
c.nop
.space 256
FAR_BRANCH:
c.nop
.space 2000
FAR_JUMP:
c.nop