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llvm-mirror/test/Verifier/diexpression-valid-entry-value.ll
Adrian Prantl 81c0c6d2aa Remove overzealous verifier check on DW_OP_LLVM_entry_value and improve the documentation
Based on the comments in the code, the idea is that AsmPrinter is
unable to produce entry value blocks of arbitrary length, such as
DW_OP_entry_value [DW_OP_reg5 DW_OP_lit1 DW_OP_plus]. But the way the
Verifier check is written it also disallows DW_OP_entry_value
[DW_OP_reg5] DW_OP_lit1 DW_OP_plus which seems to overshoot the
target.

Note that this patch does not change any of the safety guards in
LiveDebugValues — there is zero behavior change for clang. It just
allows us to legalize more complex expressions in future patches.

rdar://73907559

Differential Revision: https://reviews.llvm.org/D95990
2021-02-04 10:58:35 -08:00

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207 B
LLVM

; RUN: opt -S < %s 2>&1 | FileCheck %s
!named = !{!0, !1}
; CHECK-NOT: invalid expression
!0 = !DIExpression(DW_OP_LLVM_entry_value, 1)
!1 = !DIExpression(DW_OP_LLVM_entry_value, 1, DW_OP_lit0, DW_OP_plus)