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.
27 lines
727 B
LLVM
27 lines
727 B
LLVM
; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
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; RUN: llc < %s -mtriple=riscv32 | FileCheck %s
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@G = external global i32
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@G.1 = external global i32
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@G.2 = external global i64
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@G.3 = external global i1
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@G.4 = external global i1
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@G.5 = external global i8
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define void @f() {
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; CHECK-LABEL: f:
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; CHECK: # %bb.0: # %BB
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; CHECK-NEXT: addi sp, sp, -16
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; CHECK-NEXT: .cfi_def_cfa_offset 16
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; CHECK-NEXT: addi sp, sp, 16
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; CHECK-NEXT: .cfi_def_cfa_offset 0
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; CHECK-NEXT: ret
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BB:
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%A1 = alloca ptr, align 8
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%G4 = getelementptr i1, ptr %A1, i32 65536
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%G = getelementptr i1, ptr %A1, i64 4294967296
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%L2 = load i8, ptr %G4, align 1
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store i8 poison, ptr %G, align 1
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ret void
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}
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