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-rw-r--r--gcc/config/i386/i386.opt4
1 files changed, 4 insertions, 0 deletions
diff --git a/gcc/config/i386/i386.opt b/gcc/config/i386/i386.opt
index 85362d73105..0563bc1f925 100644
--- a/gcc/config/i386/i386.opt
+++ b/gcc/config/i386/i386.opt
@@ -266,6 +266,10 @@ Target RejectNegative Var(flag_dispatch_scheduler)
Do dispatch scheduling if processor is bdver1 and Haifa scheduling
is selected.
+mprefer-avx128
+Target Report Var(flag_prefer_avx128) Init(0)
+Use 128-bit AVX instructions instead of 256-bit AVX instructions in the auto-vectorizer.
+
;; ISA support
m32