[llvm-symbolizer] Allow single letter command flags grouping.

[Quolyk]

Summary

Currently llvm-symbolizer doesn't allow flags combining. This patch allows such grouping behavior just like addr2line. Motivation: https://bugs.llvm.org/show_bug.cgi?id=40304

[jhenderson]

The code change looks fine. Please make sure, if you haven't already, to review all tests using llvm-symbolizer (they exist both in tools/llvm-symbolizer and DebugInfo) that currently use single dash options (for long options) to make sure they aren't negatively impacted. Adding grouping behaviour can cause a change in behaviour for these cases, if you're not careful.

test/tools/llvm-symbolizer/sym.test

25 ↗

(On Diff #182887)

Rather than extending an existing test, I'd prefer it if this was done in its own test, as it isn't necessarily clear that this is specifically testing the combining of short options.

[Quolyk]

Move test to separate file.
llvm/test/tools/llvm-symbolizer/ and llvm/test/DebugInfo/llvm-symbolizer* pass successfully.

[jhenderson]

LGTM, with one nit.

test/tools/llvm-symbolizer/flag-grouping.test

7 ↗

(On Diff #182904)

Please add a new line at the end of the file.

[jhenderson]

test/tools/llvm-symbolizer/flag-grouping.test

4 ↗

(On Diff #182904)

Oops, I didn't look closely enough at the test. The start of the check here is unnecessarily complicated. It can just be:

CHECK: 0x40054d: inctwo etc.

[Quolyk]

Update test.

[jhenderson]

LGTM.

llvm/trunk/test/tools/llvm-symbolizer/flag-grouping.test

+RUN: llvm-symbolizer -inlining -apC -obj=%p/Inputs/addr.exe < %p/Inputs/addr.inp | FileCheck %s
+
+CHECK: some text
+CHECK: 0x40054d: inctwo
+CHECK: (inlined by) inc
+CHECK  (inlined by) main
+CHECK: some text2

llvm/trunk/tools/llvm-symbolizer/llvm-symbolizer.cpp

 static cl::alias ClBasenamesShort("s", cl::desc("Alias for -basenames"),
                                   cl::NotHidden, cl::aliasopt(ClBasenames));
 
 // -demangle, -C, -no-demangle
 static cl::opt<bool>
 ClDemangle("demangle", cl::init(true), cl::desc("Demangle function names"));
 static cl::alias
 ClDemangleShort("C", cl::desc("Alias for -demangle"),
-                cl::NotHidden, cl::aliasopt(ClDemangle));
+                cl::NotHidden, cl::aliasopt(ClDemangle), cl::Grouping);
 static cl::opt<bool>
 ClNoDemangle("no-demangle", cl::init(false),
              cl::desc("Don't demangle function names"));
 
 static cl::opt<std::string> ClDefaultArch("default-arch", cl::init(""),
                                           cl::desc("Default architecture "
                                                    "(for multi-arch objects)"));
 

 static cl::opt<bool>
 ClPrintAddress("print-address", cl::init(false),
                cl::desc("Show address before line information"));
 static cl::alias
 ClPrintAddressAliasAddresses("addresses", cl::desc("Alias for -print-address"),
                              cl::NotHidden, cl::aliasopt(ClPrintAddress));
 static cl::alias
 ClPrintAddressAliasA("a", cl::desc("Alias for -print-address"),
-                     cl::NotHidden, cl::aliasopt(ClPrintAddress));
+                     cl::NotHidden, cl::aliasopt(ClPrintAddress), cl::Grouping);
 
 // -pretty-print, -p
 static cl::opt<bool>
     ClPrettyPrint("pretty-print", cl::init(false),
                   cl::desc("Make the output more human friendly"));
 static cl::alias ClPrettyPrintShort("p", cl::desc("Alias for -pretty-print"),
                                     cl::NotHidden,
-                                    cl::aliasopt(ClPrettyPrint));
+                                    cl::aliasopt(ClPrettyPrint), cl::Grouping);
 
 static cl::opt<int> ClPrintSourceContextLines(
     "print-source-context-lines", cl::init(0),
     cl::desc("Print N number of source file context"));
 
 static cl::opt<bool> ClVerbose("verbose", cl::init(false),
                                cl::desc("Print verbose line info"));