2016-07-11 Marek Polacek <pola...@redhat.com>
PR c/7652
* soft-fp/soft-fp.h (_FP_FALLTHRU): Define.
* soft-fp/op-common.h: Use it.
diff --git gcc/libgcc/soft-fp/op-common.h gcc/libgcc/soft-fp/op-common.h
index 080ef0e..6691f50 100644
--- gcc/libgcc/soft-fp/op-common.h
+++ gcc/libgcc/soft-fp/op-common.h
@@ -898,6 +898,7 @@
case _FP_CLS_COMBINE (FP_CLS_NAN, FP_CLS_INF): \
case _FP_CLS_COMBINE (FP_CLS_NAN, FP_CLS_ZERO): \
R##_s = X##_s; \
+ _FP_FALLTHRU (); \
\
case _FP_CLS_COMBINE (FP_CLS_INF, FP_CLS_INF): \
case _FP_CLS_COMBINE (FP_CLS_INF, FP_CLS_NORMAL): \
@@ -911,6 +912,7 @@
case _FP_CLS_COMBINE (FP_CLS_INF, FP_CLS_NAN): \
case _FP_CLS_COMBINE (FP_CLS_ZERO, FP_CLS_NAN): \
R##_s = Y##_s; \
+ _FP_FALLTHRU (); \
\
case _FP_CLS_COMBINE (FP_CLS_NORMAL, FP_CLS_INF): \
case _FP_CLS_COMBINE (FP_CLS_NORMAL, FP_CLS_ZERO): \
@@ -1198,6 +1200,7 @@
\
case _FP_CLS_COMBINE (FP_CLS_NORMAL, FP_CLS_ZERO): \
FP_SET_EXCEPTION (FP_EX_DIVZERO); \
+ _FP_FALLTHRU (); \
case _FP_CLS_COMBINE (FP_CLS_INF, FP_CLS_ZERO): \
case _FP_CLS_COMBINE (FP_CLS_INF, FP_CLS_NORMAL): \
R##_c = FP_CLS_INF; \
diff --git gcc/libgcc/soft-fp/soft-fp.h gcc/libgcc/soft-fp/soft-fp.h
index 3b39336..999b145 100644
--- gcc/libgcc/soft-fp/soft-fp.h
+++ gcc/libgcc/soft-fp/soft-fp.h
@@ -71,6 +71,12 @@
[!!sizeof (struct { int __error_if_negative: (expr) ? 2 : -1; })]
#endif
+#if (defined __GNUC__ && __GNUC__ >= 7)
+# define _FP_FALLTHRU() __builtin_fallthrough ()
+#else
+# define _FP_FALLTHRU()
+#endif
+
/* In the Linux kernel, some architectures have a single function that
uses different kinds of unpacking and packing depending on the
instruction being emulated, meaning it is not readily visible to
