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bugpoint: add flag -verbose-errors 

The default behavior of bugpoint is to print "<crash>" when it finds a reduced
test that crashes compilation.  With this flag we now can see the output of the
crashing program.  This is useful to make sure it is the same error being
tracked down and not a different error that happens to crash the compiler as
well.

Differential Revision: https://reviews.llvm.org/D22411

llvm-svn: 275646
This commit is contained in:
Sebastian Pop 2016-07-15 23:15:06 +00:00
parent d06239d359
commit 8f7d01992c
2 changed files with 15 additions and 1 deletions
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8
llvm/docs/CommandGuide/bugpoint.rst
View File

@ -176,6 +176,14 @@ OPTIONS
**--safe-{int,jit,llc,custom}**
option.
**--verbose-errors**\ =\ *{true,false}*
The default behavior of bugpoint is to print "<crash>" when it finds a reduced
test that crashes compilation. This flag prints the output of the crashing
program to stderr. This is useful to make sure it is the same error being
tracked down and not a different error that happens to crash the compiler as
well. Defaults to false.
EXIT STATUS
-----------

8
llvm/tools/bugpoint/CrashDebugger.cpp
View File

@ -54,6 +54,9 @@ namespace {
cl::opt<bool> NoNamedMDRM("disable-namedmd-remove",
cl::desc("Do not remove global named metadata"),
cl::init(false));
cl::opt<bool> VerboseErrors("verbose-errors",
cl::desc("Print the output of crashing program"),
cl::init(false));
}
namespace llvm {
@ -905,7 +908,10 @@ static bool TestForCodeGenCrash(const BugDriver &BD, Module *M) {
std::string Error;
BD.compileProgram(M, &Error);
if (!Error.empty()) {
errs() << "<crash>\n";
if (VerboseErrors)
errs() << Error << "\n";
else
errs() << "<crash>\n";
return true; // Tool is still crashing.
}
errs() << '\n';