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Disable fatal errors in the Verifier instantiated by bugpoint's crash 

debugger.

When bugpoint hacks at a testcase it may at one point create illegal
debug info metadata that won't even pass the Verifier. A bugpoint
*driver* built with assertions should not assert on it, but reject the
malformed intermediate step and continue to do its job.

llvm-svn: 284490
This commit is contained in:
Adrian Prantl 2016-10-18 16:24:43 +00:00
parent 55466e9106
commit 919bdf1d4f
2 changed files with 25 additions and 3 deletions
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22
llvm/test/BugPoint/invalid-debuginfo.ll Normal file
View File

@ -0,0 +1,22 @@
; RUN: bugpoint -load %llvmshlibdir/BugpointPasses%shlibext %s -output-prefix %t -bugpoint-crash-too-many-cus -silence-passes 2>&1 | FileCheck %s
; REQUIRES: loadable_module
; CHECK: All DICompileUnits must be listed in llvm.dbg.cu
; When bugpoint hacks at this testcase it will at one point create illegal IR
; that won't even pass the Verifier. A bugpoint *driver* built with assertions
; should not assert on it, but reject the malformed intermediate step.
define void @f() !dbg !9 { ret void }
!llvm.dbg.cu = !{!0, !1, !2, !3, !4, !5}
!0 = distinct !DICompileUnit(language: 12, file: !6)
!1 = distinct !DICompileUnit(language: 12, file: !6)
!2 = distinct !DICompileUnit(language: 12, file: !6)
!3 = distinct !DICompileUnit(language: 12, file: !6)
!4 = distinct !DICompileUnit(language: 12, file: !6)
!5 = distinct !DICompileUnit(language: 12, file: !6)
!6 = !DIFile(filename: "path/to/file", directory: "/path/to/dir")
!llvm.module.flags = !{!7, !8}
!7 = !{i32 2, !"Dwarf Version", i32 4}
!8 = !{i32 2, !"Debug Info Version", i32 3}
!9 = distinct !DISubprogram(unit: !0)

6
llvm/tools/bugpoint/CrashDebugger.cpp
View File

@ -733,7 +733,7 @@ bool ReduceCrashingInstructions::TestInsts(
// Verify that this is still valid.
legacy::PassManager Passes;
Passes.add(createVerifierPass());
Passes.add(createVerifierPass(/*FatalErrors=*/false));
Passes.run(*M);
// Try running on the hacked up program...
@ -809,7 +809,7 @@ bool ReduceCrashingNamedMD::TestNamedMDs(std::vector<std::string> &NamedMDs) {
// Verify that this is still valid.
legacy::PassManager Passes;
Passes.add(createVerifierPass());
Passes.add(createVerifierPass(/*FatalErrors=*/false));
Passes.run(*M);
// Try running on the hacked up program...
@ -876,7 +876,7 @@ bool ReduceCrashingNamedMDOps::TestNamedMDOps(
// Verify that this is still valid.
legacy::PassManager Passes;
Passes.add(createVerifierPass());
Passes.add(createVerifierPass(/*FatalErrors=*/false));
Passes.run(*M);
// Try running on the hacked up program...