97982a8c60
This patch adds CFI instructions in the function epilogue. Before patch: addi sp, s0, -32 ld ra, 24(sp) # 8-byte Folded Reload ld s0, 16(sp) # 8-byte Folded Reload ld s1, 8(sp) # 8-byte Folded Reload addi sp, sp, 32 ret After patch: addi sp, s0, -32 .cfi_def_cfa sp, 32 ld ra, 24(sp) # 8-byte Folded Reload ld s0, 16(sp) # 8-byte Folded Reload ld s1, 8(sp) # 8-byte Folded Reload .cfi_restore ra .cfi_restore s0 .cfi_restore s1 addi sp, sp, 32 .cfi_def_cfa_offset 0 ret This functionality is already present in `riscv-gcc`, but it’s not in `clang` and this slightly impairs the `lldb` debugging experience, e.g. backtrace.
150 lines
5.6 KiB
LLVM
150 lines
5.6 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
|
|
; RUN: llc -mtriple=riscv32 -verify-machineinstrs < %s \
|
|
; RUN: | FileCheck %s -check-prefix=RV32I
|
|
; RUN: llc -mtriple=riscv32 -target-abi ilp32e -verify-machineinstrs < %s \
|
|
; RUN: | FileCheck %s -check-prefix=RV32I-ILP32E
|
|
; RUN: llc -mtriple=riscv64 -verify-machineinstrs < %s \
|
|
; RUN: | FileCheck %s -check-prefix=RV64I
|
|
; RUN: llc -mtriple=riscv64 -target-abi lp64e -verify-machineinstrs < %s \
|
|
; RUN: | FileCheck %s -check-prefix=RV64I-LP64E
|
|
|
|
declare void @callee(ptr, ptr)
|
|
|
|
define void @caller(i32 %n) {
|
|
; RV32I-LABEL: caller:
|
|
; RV32I: # %bb.0:
|
|
; RV32I-NEXT: addi sp, sp, -64
|
|
; RV32I-NEXT: .cfi_def_cfa_offset 64
|
|
; RV32I-NEXT: sw ra, 60(sp) # 4-byte Folded Spill
|
|
; RV32I-NEXT: sw s0, 56(sp) # 4-byte Folded Spill
|
|
; RV32I-NEXT: sw s1, 52(sp) # 4-byte Folded Spill
|
|
; RV32I-NEXT: .cfi_offset ra, -4
|
|
; RV32I-NEXT: .cfi_offset s0, -8
|
|
; RV32I-NEXT: .cfi_offset s1, -12
|
|
; RV32I-NEXT: addi s0, sp, 64
|
|
; RV32I-NEXT: .cfi_def_cfa s0, 0
|
|
; RV32I-NEXT: andi sp, sp, -64
|
|
; RV32I-NEXT: mv s1, sp
|
|
; RV32I-NEXT: addi a0, a0, 15
|
|
; RV32I-NEXT: andi a0, a0, -16
|
|
; RV32I-NEXT: sub a0, sp, a0
|
|
; RV32I-NEXT: mv sp, a0
|
|
; RV32I-NEXT: mv a1, s1
|
|
; RV32I-NEXT: call callee
|
|
; RV32I-NEXT: addi sp, s0, -64
|
|
; RV32I-NEXT: .cfi_def_cfa sp, 64
|
|
; RV32I-NEXT: lw ra, 60(sp) # 4-byte Folded Reload
|
|
; RV32I-NEXT: lw s0, 56(sp) # 4-byte Folded Reload
|
|
; RV32I-NEXT: lw s1, 52(sp) # 4-byte Folded Reload
|
|
; RV32I-NEXT: .cfi_restore ra
|
|
; RV32I-NEXT: .cfi_restore s0
|
|
; RV32I-NEXT: .cfi_restore s1
|
|
; RV32I-NEXT: addi sp, sp, 64
|
|
; RV32I-NEXT: .cfi_def_cfa_offset 0
|
|
; RV32I-NEXT: ret
|
|
;
|
|
; RV32I-ILP32E-LABEL: caller:
|
|
; RV32I-ILP32E: # %bb.0:
|
|
; RV32I-ILP32E-NEXT: addi sp, sp, -64
|
|
; RV32I-ILP32E-NEXT: .cfi_def_cfa_offset 64
|
|
; RV32I-ILP32E-NEXT: sw ra, 60(sp) # 4-byte Folded Spill
|
|
; RV32I-ILP32E-NEXT: sw s0, 56(sp) # 4-byte Folded Spill
|
|
; RV32I-ILP32E-NEXT: sw s1, 52(sp) # 4-byte Folded Spill
|
|
; RV32I-ILP32E-NEXT: .cfi_offset ra, -4
|
|
; RV32I-ILP32E-NEXT: .cfi_offset s0, -8
|
|
; RV32I-ILP32E-NEXT: .cfi_offset s1, -12
|
|
; RV32I-ILP32E-NEXT: addi s0, sp, 64
|
|
; RV32I-ILP32E-NEXT: .cfi_def_cfa s0, 0
|
|
; RV32I-ILP32E-NEXT: andi sp, sp, -64
|
|
; RV32I-ILP32E-NEXT: mv s1, sp
|
|
; RV32I-ILP32E-NEXT: addi a0, a0, 3
|
|
; RV32I-ILP32E-NEXT: andi a0, a0, -4
|
|
; RV32I-ILP32E-NEXT: sub a0, sp, a0
|
|
; RV32I-ILP32E-NEXT: mv sp, a0
|
|
; RV32I-ILP32E-NEXT: mv a1, s1
|
|
; RV32I-ILP32E-NEXT: call callee
|
|
; RV32I-ILP32E-NEXT: addi sp, s0, -64
|
|
; RV32I-ILP32E-NEXT: .cfi_def_cfa sp, 64
|
|
; RV32I-ILP32E-NEXT: lw ra, 60(sp) # 4-byte Folded Reload
|
|
; RV32I-ILP32E-NEXT: lw s0, 56(sp) # 4-byte Folded Reload
|
|
; RV32I-ILP32E-NEXT: lw s1, 52(sp) # 4-byte Folded Reload
|
|
; RV32I-ILP32E-NEXT: .cfi_restore ra
|
|
; RV32I-ILP32E-NEXT: .cfi_restore s0
|
|
; RV32I-ILP32E-NEXT: .cfi_restore s1
|
|
; RV32I-ILP32E-NEXT: addi sp, sp, 64
|
|
; RV32I-ILP32E-NEXT: .cfi_def_cfa_offset 0
|
|
; RV32I-ILP32E-NEXT: ret
|
|
;
|
|
; RV64I-LABEL: caller:
|
|
; RV64I: # %bb.0:
|
|
; RV64I-NEXT: addi sp, sp, -64
|
|
; RV64I-NEXT: .cfi_def_cfa_offset 64
|
|
; RV64I-NEXT: sd ra, 56(sp) # 8-byte Folded Spill
|
|
; RV64I-NEXT: sd s0, 48(sp) # 8-byte Folded Spill
|
|
; RV64I-NEXT: sd s1, 40(sp) # 8-byte Folded Spill
|
|
; RV64I-NEXT: .cfi_offset ra, -8
|
|
; RV64I-NEXT: .cfi_offset s0, -16
|
|
; RV64I-NEXT: .cfi_offset s1, -24
|
|
; RV64I-NEXT: addi s0, sp, 64
|
|
; RV64I-NEXT: .cfi_def_cfa s0, 0
|
|
; RV64I-NEXT: andi sp, sp, -64
|
|
; RV64I-NEXT: mv s1, sp
|
|
; RV64I-NEXT: slli a0, a0, 32
|
|
; RV64I-NEXT: srli a0, a0, 32
|
|
; RV64I-NEXT: addi a0, a0, 15
|
|
; RV64I-NEXT: andi a0, a0, -16
|
|
; RV64I-NEXT: sub a0, sp, a0
|
|
; RV64I-NEXT: mv sp, a0
|
|
; RV64I-NEXT: mv a1, s1
|
|
; RV64I-NEXT: call callee
|
|
; RV64I-NEXT: addi sp, s0, -64
|
|
; RV64I-NEXT: .cfi_def_cfa sp, 64
|
|
; RV64I-NEXT: ld ra, 56(sp) # 8-byte Folded Reload
|
|
; RV64I-NEXT: ld s0, 48(sp) # 8-byte Folded Reload
|
|
; RV64I-NEXT: ld s1, 40(sp) # 8-byte Folded Reload
|
|
; RV64I-NEXT: .cfi_restore ra
|
|
; RV64I-NEXT: .cfi_restore s0
|
|
; RV64I-NEXT: .cfi_restore s1
|
|
; RV64I-NEXT: addi sp, sp, 64
|
|
; RV64I-NEXT: .cfi_def_cfa_offset 0
|
|
; RV64I-NEXT: ret
|
|
;
|
|
; RV64I-LP64E-LABEL: caller:
|
|
; RV64I-LP64E: # %bb.0:
|
|
; RV64I-LP64E-NEXT: addi sp, sp, -64
|
|
; RV64I-LP64E-NEXT: .cfi_def_cfa_offset 64
|
|
; RV64I-LP64E-NEXT: sd ra, 56(sp) # 8-byte Folded Spill
|
|
; RV64I-LP64E-NEXT: sd s0, 48(sp) # 8-byte Folded Spill
|
|
; RV64I-LP64E-NEXT: sd s1, 40(sp) # 8-byte Folded Spill
|
|
; RV64I-LP64E-NEXT: .cfi_offset ra, -8
|
|
; RV64I-LP64E-NEXT: .cfi_offset s0, -16
|
|
; RV64I-LP64E-NEXT: .cfi_offset s1, -24
|
|
; RV64I-LP64E-NEXT: addi s0, sp, 64
|
|
; RV64I-LP64E-NEXT: .cfi_def_cfa s0, 0
|
|
; RV64I-LP64E-NEXT: andi sp, sp, -64
|
|
; RV64I-LP64E-NEXT: mv s1, sp
|
|
; RV64I-LP64E-NEXT: slli a0, a0, 32
|
|
; RV64I-LP64E-NEXT: srli a0, a0, 32
|
|
; RV64I-LP64E-NEXT: addi a0, a0, 7
|
|
; RV64I-LP64E-NEXT: andi a0, a0, -8
|
|
; RV64I-LP64E-NEXT: sub a0, sp, a0
|
|
; RV64I-LP64E-NEXT: mv sp, a0
|
|
; RV64I-LP64E-NEXT: mv a1, s1
|
|
; RV64I-LP64E-NEXT: call callee
|
|
; RV64I-LP64E-NEXT: addi sp, s0, -64
|
|
; RV64I-LP64E-NEXT: .cfi_def_cfa sp, 64
|
|
; RV64I-LP64E-NEXT: ld ra, 56(sp) # 8-byte Folded Reload
|
|
; RV64I-LP64E-NEXT: ld s0, 48(sp) # 8-byte Folded Reload
|
|
; RV64I-LP64E-NEXT: ld s1, 40(sp) # 8-byte Folded Reload
|
|
; RV64I-LP64E-NEXT: .cfi_restore ra
|
|
; RV64I-LP64E-NEXT: .cfi_restore s0
|
|
; RV64I-LP64E-NEXT: .cfi_restore s1
|
|
; RV64I-LP64E-NEXT: addi sp, sp, 64
|
|
; RV64I-LP64E-NEXT: .cfi_def_cfa_offset 0
|
|
; RV64I-LP64E-NEXT: ret
|
|
%1 = alloca i8, i32 %n
|
|
%2 = alloca i32, align 64
|
|
call void @callee(ptr %1, ptr %2)
|
|
ret void
|
|
}
|