Fix #777: don't parse .suffix if <stage> is provided.

Adding a test for this also uncovered an extraneous \r in the runtests script,
fixed now.

StandAlone/StandAlone.cpp

@@ -356,8 +356,7 @@ void ProcessArguments(int argc, char* argv[])
                 if (argc > 0) {
                     argc--;
                     argv++;
-                }
+                } else
-                else
                     Error("no <stage> specified for -S");
                 break;
             case 'G':
@@ -848,9 +847,13 @@ int C_DECL main(int argc, char* argv[])
 EShLanguage FindLanguage(const std::string& name, bool parseSuffix)
 {
     size_t ext = 0;
+    std::string suffix;
 
+    if (shaderStageName)
+        suffix = shaderStageName;
+    else {
         // Search for a suffix on a filename: e.g, "myfile.frag".  If given
-    // the suffix directly, we skip looking the '.'
+        // the suffix directly, we skip looking for the '.'
         if (parseSuffix) {
             ext = name.rfind('.');
             if (ext == std::string::npos) {
@@ -859,10 +862,8 @@ EShLanguage FindLanguage(const std::string& name, bool parseSuffix)
             }
             ++ext;
         }
-
+        suffix = name.substr(ext, std::string::npos);
-    std::string suffix = name.substr(ext, std::string::npos);
+    }
-    if (shaderStageName)
-        suffix = shaderStageName;
 
     if (suffix == "vert")
         return EShLangVertex;
@@ -957,8 +958,8 @@ void usage()
            "  -H          print human readable form of SPIR-V; turns on -V\n"
            "  -E          print pre-processed GLSL; cannot be used with -l;\n"
            "              errors will appear on stderr.\n"
-           "  -S <stage>  uses explicit stage specified, rather then the file extension.\n"
+           "  -S <stage>  uses specified stage rather than parsing the file extension\n"
-           "              valid choices are vert, tesc, tese, geom, frag, or comp\n"
+           "              valid choices for <stage> are vert, tesc, tese, geom, frag, or comp\n"
            "  -c          configuration dump;\n"
            "              creates the default configuration file (redirect to a .conf file)\n"
            "  -C          cascading errors; risks crashes from accumulation of error recoveries\n"

Test/baseResults/nosuffix.out

@@ -0,0 +1,15 @@
+nosuffix
+Shader version: 100
+0:? Sequence
+0:1  Function Definition: main( ( global void)
+0:1    Function Parameters: 
+0:3    Sequence
+0:3      move second child to first child ( temp highp 4-component vector of float)
+0:3        'gl_Position' ( gl_Position highp 4-component vector of float Position)
+0:3        Constant:
+0:3          1.000000
+0:3          1.000000
+0:3          1.000000
+0:3          1.000000
+0:?   Linker Objects
+

Test/nosuffix

@@ -0,0 +1,4 @@
+void main()
+{
+    gl_Position = vec4(1.0);
+}

Test/runtests

@@ -66,4 +66,18 @@ else
     echo Tests Failed.
 fi
 
+#
+# Testing -S
+#
+echo Running explicit stage test
+$EXE -i -S vert nosuffix > $TARGETDIR/nosuffix.out
+diff -b $BASEDIR/nosuffix.out $TARGETDIR/nosuffix.out || HASERROR=1
+
+if [ $HASERROR -eq 0 ]
+then
+    echo Tests Succeeded.
+else
+    echo Tests Failed.
+fi
+
 exit $HASERROR

glslang/Include/revision.h

@@ -2,5 +2,5 @@
 // For the version, it uses the latest git tag followed by the number of commits.
 // For the date, it uses the current date (when then script is run).
 
-#define GLSLANG_REVISION "Overload400-PrecQual.1916"
+#define GLSLANG_REVISION "Overload400-PrecQual.1920"
-#define GLSLANG_DATE "15-Mar-2017"
+#define GLSLANG_DATE "16-Mar-2017"