Add --quiet option to supress all diagnostic output

ispc.cpp

@@ -510,6 +510,7 @@ Globals::Globals() {
     debugPrint = false;
     disableWarnings = false;
     warningsAsErrors = false;
+    quiet = false;
     disableLineWrap = false;
     emitPerfWarnings = true;
     emitInstrumentation = false;

ispc.h

@@ -388,6 +388,9 @@ struct Globals {
         possible performance pitfalls. */
     bool emitPerfWarnings;
 
+    /** Indicates whether all printed output should be surpressed. */
+    bool quiet;
+
     /** Indicates whether calls should be emitted in the program to an
         externally-defined program instrumentation function. (See the
         "Instrumenting your ispc programs" section in the user's

main.cpp

@@ -129,6 +129,7 @@ usage(int ret) {
 #ifndef ISPC_IS_WINDOWS
     printf("    [--pic]\t\t\t\tGenerate position-independent code\n");
 #endif // !ISPC_IS_WINDOWS
+    printf("    [--quiet]\t\t\t\tSuppress all output\n");
     printf("    [--target=<isa>]\t\t\tSelect target ISA. <isa>={%s}\n", Target::SupportedTargetISAs());
     printf("    [--version]\t\t\t\tPrint ispc version\n");
     printf("    [--werror]\t\t\t\tTreat warnings as errors\n");
@@ -383,6 +384,8 @@ int main(int Argc, char *Argv[]) {
         else if (!strcmp(argv[i], "--pic"))
             generatePIC = true;
 #endif // !ISPC_IS_WINDOWS
+        else if (!strcmp(argv[i], "--quiet"))
+            g->quiet = true;
         else if (!strcmp(argv[i], "-v") || !strcmp(argv[i], "--version")) {
             lPrintVersion();
             return 0;

parse.yy

@@ -91,7 +91,12 @@ extern int yylex(YYSTYPE *, SourcePos *);
 
 extern char *yytext;
 
-void yyerror(const char *s) { fprintf(stderr, "Parse error: %s\n", s); }
+void yyerror(const char *s) { 
+    if (!g->quiet) {
+        ++m->errorCount;
+        fprintf(stderr, "Parse error: %s\n", s); 
+    }
+}
 
 static void lAddDeclaration(DeclSpecs *ds, Declarator *decl);
 static void lAddFunctionParams(Declarator *decl);

util.cpp

@@ -265,17 +265,20 @@ lPrint(const char *type, SourcePos p, const char *fmt, va_list args) {
 
 void
 Error(SourcePos p, const char *fmt, ...) {
+    if (m != NULL) ++m->errorCount;
+    if (g->quiet)
+        return;
+
     va_list args;
     va_start(args, fmt);
     lPrint("Error", p, fmt, args);
-    if (m != NULL) ++m->errorCount;
     va_end(args);
 }
 
 
 void
 Debug(SourcePos p, const char *fmt, ...) {
-    if (!g->debugPrint)
+    if (!g->debugPrint || g->quiet)
         return;
 
     va_list args;
@@ -287,21 +290,23 @@ Debug(SourcePos p, const char *fmt, ...) {
 
 void
 Warning(SourcePos p, const char *fmt, ...) {
-    if (g->disableWarnings)
+    if (g->warningsAsErrors && m != NULL)
+        ++m->errorCount;
+
+    if (g->disableWarnings || g->quiet)
         return;
 
     va_list args;
     va_start(args, fmt);
     lPrint(g->warningsAsErrors ? "Error" : "Warning", p, fmt, args);
-    if (g->warningsAsErrors && m != NULL)
-        ++m->errorCount;
     va_end(args);
 }
 
 
 void
 PerformanceWarning(SourcePos p, const char *fmt, ...) {
-    if (!g->emitPerfWarnings || strcmp(p.name, "stdlib.ispc") == 0)
+    if (!g->emitPerfWarnings || strcmp(p.name, "stdlib.ispc") == 0 ||
+        g->quiet)
         return;
 
     va_list args;