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.
70 lines
2.6 KiB
LLVM
70 lines
2.6 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
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; RUN: llc -mtriple=riscv64 -debug-entry-values -enable-misched=0 < %s | FileCheck %s
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; Trivial patchpoint codegen
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;
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define i64 @trivial_patchpoint_codegen(i64 %p1, i64 %p2, i64 %p3, i64 %p4) {
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; CHECK-LABEL: trivial_patchpoint_codegen:
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; CHECK: # %bb.0: # %entry
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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: sd s0, 8(sp) # 8-byte Folded Spill
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; CHECK-NEXT: sd s1, 0(sp) # 8-byte Folded Spill
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; CHECK-NEXT: .cfi_offset s0, -8
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; CHECK-NEXT: .cfi_offset s1, -16
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; CHECK-NEXT: mv s0, a0
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; CHECK-NEXT: .Ltmp0:
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; CHECK-NEXT: lui ra, 3563
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; CHECK-NEXT: addiw ra, ra, -577
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; CHECK-NEXT: slli ra, ra, 12
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; CHECK-NEXT: addi ra, ra, -259
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; CHECK-NEXT: slli ra, ra, 12
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; CHECK-NEXT: addi ra, ra, -1282
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; CHECK-NEXT: jalr ra
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; CHECK-NEXT: mv s1, a0
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; CHECK-NEXT: mv a0, s0
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; CHECK-NEXT: mv a1, s1
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; CHECK-NEXT: .Ltmp1:
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; CHECK-NEXT: lui ra, 3563
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; CHECK-NEXT: addiw ra, ra, -577
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; CHECK-NEXT: slli ra, ra, 12
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; CHECK-NEXT: addi ra, ra, -259
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; CHECK-NEXT: slli ra, ra, 12
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; CHECK-NEXT: addi ra, ra, -1281
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; CHECK-NEXT: jalr ra
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; CHECK-NEXT: mv a0, s1
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; CHECK-NEXT: ld s0, 8(sp) # 8-byte Folded Reload
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; CHECK-NEXT: ld s1, 0(sp) # 8-byte Folded Reload
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; CHECK-NEXT: .cfi_restore s0
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; CHECK-NEXT: .cfi_restore s1
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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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entry:
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%resolveCall2 = inttoptr i64 244837814094590 to i8*
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%result = tail call i64 (i64, i32, i8*, i32, ...) @llvm.experimental.patchpoint.i64(i64 2, i32 28, i8* %resolveCall2, i32 4, i64 %p1, i64 %p2, i64 %p3, i64 %p4)
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%resolveCall3 = inttoptr i64 244837814094591 to i8*
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tail call void (i64, i32, i8*, i32, ...) @llvm.experimental.patchpoint.void(i64 3, i32 28, i8* %resolveCall3, i32 2, i64 %p1, i64 %result)
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ret i64 %result
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}
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; Test small patchpoints that don't emit calls.
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define void @small_patchpoint_codegen(i64 %p1, i64 %p2, i64 %p3, i64 %p4) {
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; CHECK-LABEL: small_patchpoint_codegen:
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; CHECK: # %bb.0: # %entry
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; CHECK-NEXT: .Ltmp2:
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; CHECK-NEXT: nop
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; CHECK-NEXT: nop
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; CHECK-NEXT: nop
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; CHECK-NEXT: nop
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; CHECK-NEXT: nop
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; CHECK-NEXT: ret
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entry:
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%result = tail call i64 (i64, i32, ptr, i32, ...) @llvm.experimental.patchpoint.i64(i64 5, i32 20, ptr null, i32 2, i64 %p1, i64 %p2)
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ret void
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}
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declare void @llvm.experimental.stackmap(i64, i32, ...)
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declare void @llvm.experimental.patchpoint.void(i64, i32, ptr, i32, ...)
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declare i64 @llvm.experimental.patchpoint.i64(i64, i32, ptr, i32, ...)
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