[llvm-symbolizer] Add -p as alias to -pretty-print

Summary: Provides -p as a short alias for -pretty-print. Motivation: https://bugs.llvm.org/show_bug.cgi?id=40076

Reviewers: samsonov, khemant, ruiu, rnk, fjricci, jhenderson

Reviewed By: jhenderson

Subscribers: llvm-commits

Differential Revision: https://reviews.llvm.org/D56542

llvm-svn: 350832

llvm/docs/CommandGuide/llvm-symbolizer.rst

@@ -110,7 +110,7 @@ OPTIONS
 
  Print address before the source code location. Defaults to false.
 
-.. option:: -pretty-print
+.. option:: -pretty-print, -p
 
  Print human readable output. If ``-inlining`` is specified, enclosing scope is
  prefixed by (inlined by). Refer to listed examples.

llvm/test/tools/llvm-symbolizer/sym.test

@@ -18,9 +18,10 @@
 #Build as : clang -g -O2 addr.c
 
 RUN: llvm-symbolizer -print-address -obj=%p/Inputs/addr.exe < %p/Inputs/addr.inp | FileCheck %s
-RUN: llvm-symbolizer -inlining -print-address -pretty-print -obj=%p/Inputs/addr.exe < %p/Inputs/addr.inp | FileCheck --check-prefix="PRETTY" %s 
+RUN: llvm-symbolizer -inlining -print-address -pretty-print -obj=%p/Inputs/addr.exe < %p/Inputs/addr.inp | FileCheck -check-prefix="PRETTY" %s 
+RUN: llvm-symbolizer -inlining -print-address -p -obj=%p/Inputs/addr.exe < %p/Inputs/addr.inp | FileCheck -check-prefix="PRETTY" %s
 RUN: echo "0x1" > %t.input
-RUN: llvm-symbolizer -obj=%p/Inputs/zero < %t.input | FileCheck --check-prefix="ZERO" %s
+RUN: llvm-symbolizer -obj=%p/Inputs/zero < %t.input | FileCheck -check-prefix="ZERO" %s
 
 #CHECK: some text
 #CHECK: 0x40054d

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

@@ -79,9 +79,13 @@ static cl::opt<bool>
     ClPrintAddress("print-address", cl::init(false),
                    cl::desc("Show address before line information"));
 
+// -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));
 
 static cl::opt<int> ClPrintSourceContextLines(
     "print-source-context-lines", cl::init(0),