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-rw-r--r--autoconf/configure.ac4
1 files changed, 2 insertions, 2 deletions
diff --git a/autoconf/configure.ac b/autoconf/configure.ac
index bd85577bcb..ff5804b27d 100644
--- a/autoconf/configure.ac
+++ b/autoconf/configure.ac
@@ -728,8 +728,8 @@ AC_MSG_CHECKING([optimization flags])
case "$withval" in
default)
case "$llvm_cv_os_type" in
- MingW) optimize_option=-O3 ;;
- *) optimize_option=-O2 ;;
+ MingW) optimize_option=-O2 ;;
+ *) optimize_option=-O3 ;;
esac ;;
*) optimize_option="$withval" ;;
esac