r242606 - Silence the driver warnings, if we see "-w" on the Driver.

[Filipe Cabecinhas]

Author: filcab
Date: Sat Jul 18 01:35:24 2015
New Revision: 242606

URL: http://llvm.org/viewvc/llvm-project?rev=242606&view=rev
Log:
Silence the driver warnings, if we see "-w" on the Driver.

Summary:
We can enable warnings after that -w, so the patch might not be 100%
correct.

The problem that triggered this is: we have some amount of tests that
expect 0 warnings (including unit tests for -w), but -w ends up not fully
silencing everything.

Reviewers: echristo, chandlerc

Subscribers: cfe-commits

Differential Revision: http://reviews.llvm.org/D11322

Modified:
    cfe/trunk/lib/Driver/Driver.cpp
    cfe/trunk/test/Index/warning-flags.c

Modified: cfe/trunk/lib/Driver/Driver.cpp
URL: http://llvm.org/viewvc/llvm-project/cfe/trunk/lib/Driver/Driver.cpp?rev=242606&r1=242605&r2=242606&view=diff
==============================================================================
--- cfe/trunk/lib/Driver/Driver.cpp (original)
+++ cfe/trunk/lib/Driver/Driver.cpp Sat Jul 18 01:35:24 2015
@@ -387,6 +387,9 @@ Compilation *Driver::BuildCompilation(Ar
 
   InputArgList Args = ParseArgStrings(ArgList.slice(1));
 
+  // Silence driver warnings if requested
+  Diags.setIgnoreAllWarnings(Args.hasArg(options::OPT_w));
+
   // -no-canonical-prefixes is used very early in main.
   Args.ClaimAllArgs(options::OPT_no_canonical_prefixes);
 

Modified: cfe/trunk/test/Index/warning-flags.c
URL: http://llvm.org/viewvc/llvm-project/cfe/trunk/test/Index/warning-flags.c?rev=242606&r1=242605&r2=242606&view=diff
==============================================================================
--- cfe/trunk/test/Index/warning-flags.c (original)
+++ cfe/trunk/test/Index/warning-flags.c Sat Jul 18 01:35:24 2015
@@ -7,6 +7,7 @@ int *bar(float *f) { return f; }
 // RUN: c-index-test -test-load-source-reparse 5 all -Wno-return-type %s 2>&1|FileCheck -check-prefix=CHECK-SECOND-WARNING %s
 // RUN: c-index-test -test-load-source all -w %s 2>&1|not grep warning:
 // RUN: c-index-test -test-load-source-reparse 5 all -w %s 2>&1|not grep warning:
+// RUN: c-index-test -test-load-source all -w -O4 %s 2>&1|not grep warning:
 
 // CHECK-BOTH-WARNINGS: warning: control reaches end of non-void function
 // CHECK-BOTH-WARNINGS: warning: incompatible pointer types returning 'float *' from a function with result type 'int *'