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38dcbfd498
As discussed on the RFC [0], I am sharing the set of patches that
enables checking of original Debug Info metadata preservation in
optimizations. The proof-of-concept/proposal can be found at [1].
The implementation from the [1] was full of duplicated code,
so this set of patches tries to merge this approach into the existing
debugify utility.
For example, the utility pass in the original-debuginfo-check
mode could be invoked as follows:
$ opt -verify-debuginfo-preserve -pass-to-test sample.ll
Since this is very initial stage of the implementation,
there is a space for improvements such as:
- Add support for the new pass manager
- Add support for metadata other than DILocations and DISubprograms
[0] https://groups.google.com/forum/#!msg/llvm-dev/QOyF-38YPlE/G213uiuwCAAJ
[1] https://github.com/djolertrk/llvm-di-checker
Differential Revision: https://reviews.llvm.org/D82545
The test that was failing is now forced to use the old PM.
24 lines
738 B
LLVM
24 lines
738 B
LLVM
; RUN: opt -verify-debuginfo-preserve -instcombine --enable-new-pm=false -S -o - < %s 2>&1 | FileCheck %s
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; CHECK: ModuleDebugify (original debuginfo): Skipping module without debug info
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; CHECK-NEXT: CheckModuleDebugify (original debuginfo): Skipping module without debug info
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; ModuleID = 'no-dbg-info.c'
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source_filename = "no-dbg-info.c"
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target datalayout = "e-m:e-p270:32:32-p271:32:32-p272:64:64-i64:64-f80:128-n8:16:32:64-S128"
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target triple = "x86_64-unknown-linux-gnu"
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; Function Attrs: nounwind uwtable
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define dso_local i32 @fn() {
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%1 = call i32 (...) @fn2()
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ret i32 %1
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}
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declare dso_local i32 @fn2(...)
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!llvm.module.flags = !{!0}
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!llvm.ident = !{!1}
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!0 = !{i32 1, !"wchar_size", i32 4}
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!1 = !{!"clang version 11.0.0"}
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