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-rw-r--r--gcc/config/i386/i386-options.cc6
1 files changed, 5 insertions, 1 deletions
diff --git a/gcc/config/i386/i386-options.cc b/gcc/config/i386/i386-options.cc
index 2cb0bdd..7f593ce 100644
--- a/gcc/config/i386/i386-options.cc
+++ b/gcc/config/i386/i386-options.cc
@@ -1400,7 +1400,11 @@ ix86_valid_target_attribute_tree (tree fndecl, tree args,
if (option_strings[IX86_FUNCTION_SPECIFIC_TUNE])
opts->x_ix86_tune_string
= ggc_strdup (option_strings[IX86_FUNCTION_SPECIFIC_TUNE]);
- else if (orig_tune_defaulted)
+ /* If we have explicit arch string and no tune string specified, set
+ tune_string to NULL and later it will be overriden by arch_string
+ so target clones can get proper optimization. */
+ else if (option_strings[IX86_FUNCTION_SPECIFIC_ARCH]
+ || orig_tune_defaulted)
opts->x_ix86_tune_string = NULL;
/* If fpmath= is not set, and we now have sse2 on 32-bit, use it. */