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.
54 lines
1.6 KiB
LLVM
54 lines
1.6 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
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; RUN: llc -mtriple=riscv32 -verify-machineinstrs < %s \
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; RUN: | FileCheck %s --check-prefix=RV32I
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; RUN: llc -mtriple=riscv64 -verify-machineinstrs < %s \
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; RUN: | FileCheck %s --check-prefix=RV64I
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define void @cast0(ptr addrspace(1) %ptr) {
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; RV32I-LABEL: cast0:
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; RV32I: # %bb.0:
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; RV32I-NEXT: sw zero, 0(a0)
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; RV32I-NEXT: ret
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;
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; RV64I-LABEL: cast0:
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; RV64I: # %bb.0:
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; RV64I-NEXT: sw zero, 0(a0)
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; RV64I-NEXT: ret
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%ptr0 = addrspacecast ptr addrspace(1) %ptr to ptr addrspace(0)
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store i32 0, ptr %ptr0
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ret void
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}
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define void @cast1(ptr %ptr) {
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; RV32I-LABEL: cast1:
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; RV32I: # %bb.0:
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; RV32I-NEXT: addi sp, sp, -16
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; RV32I-NEXT: .cfi_def_cfa_offset 16
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; RV32I-NEXT: sw ra, 12(sp) # 4-byte Folded Spill
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; RV32I-NEXT: .cfi_offset ra, -4
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; RV32I-NEXT: call foo
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; RV32I-NEXT: lw ra, 12(sp) # 4-byte Folded Reload
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; RV32I-NEXT: .cfi_restore ra
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; RV32I-NEXT: addi sp, sp, 16
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; RV32I-NEXT: .cfi_def_cfa_offset 0
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; RV32I-NEXT: ret
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;
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; RV64I-LABEL: cast1:
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; RV64I: # %bb.0:
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; RV64I-NEXT: addi sp, sp, -16
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; RV64I-NEXT: .cfi_def_cfa_offset 16
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; RV64I-NEXT: sd ra, 8(sp) # 8-byte Folded Spill
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; RV64I-NEXT: .cfi_offset ra, -8
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; RV64I-NEXT: call foo
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; RV64I-NEXT: ld ra, 8(sp) # 8-byte Folded Reload
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; RV64I-NEXT: .cfi_restore ra
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; RV64I-NEXT: addi sp, sp, 16
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; RV64I-NEXT: .cfi_def_cfa_offset 0
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; RV64I-NEXT: ret
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%castptr = addrspacecast ptr %ptr to ptr addrspace(10)
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call void @foo(ptr addrspace(10) %castptr)
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ret void
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}
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declare void @foo(ptr addrspace(10))
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