build: Add support for DISABLE_DEFAULT_STRICT_ALIASING, which does what one
might expect.
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@124848 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Driver/Tools.cpp b/lib/Driver/Tools.cpp
index d1d8873..f3d2d4b 100644
--- a/lib/Driver/Tools.cpp
+++ b/lib/Driver/Tools.cpp
@@ -1007,9 +1007,9 @@
if (!Args.hasFlag(options::OPT_fzero_initialized_in_bss,
options::OPT_fno_zero_initialized_in_bss))
CmdArgs.push_back("-mno-zero-initialized-in-bss");
- if (Args.hasFlag(options::OPT_fno_strict_aliasing,
- options::OPT_fstrict_aliasing,
- false))
+ if (!Args.hasFlag(options::OPT_fstrict_aliasing,
+ options::OPT_fno_strict_aliasing,
+ getToolChain().IsStrictAliasingDefault()))
CmdArgs.push_back("-relaxed-aliasing");
// Decide whether to use verbose asm. Verbose assembly is the default on