From: Claudiu Zissulescu <claz...@gmail.com>
Use munaligned-access to control if we can have unaligned accesses. For ARC
HS family unaligned access is always on.
2017-10-19 Claudiu Zissulescu <claz...@synopsys.com>
* config/arc/arc-c.def (__ARC_UNALIGNED__): New define.
* config/arc/arc.h (STRICT_ALIGNMENT): Control this macro using
munaligned-access.
---
gcc/config/arc/arc-c.def | 1 +
gcc/config/arc/arc.h | 2 +-
2 files changed, 2 insertions(+), 1 deletion(-)
diff --git a/gcc/config/arc/arc-c.def b/gcc/config/arc/arc-c.def
index c9443c9..86eab4e 100644
--- a/gcc/config/arc/arc-c.def
+++ b/gcc/config/arc/arc-c.def
@@ -29,6 +29,7 @@ ARC_C_DEF ("__ARC_MUL64__", TARGET_MUL64_SET)
ARC_C_DEF ("__ARC_MUL32BY16__", TARGET_MULMAC_32BY16_SET)
ARC_C_DEF ("__ARC_SIMD__", TARGET_SIMD_SET)
ARC_C_DEF ("__ARC_RF16__", TARGET_RF16)
+ARC_C_DEF ("__ARC_UNALIGNED__", !STRICT_ALIGNMENT)
ARC_C_DEF ("__ARC_BARREL_SHIFTER__", TARGET_BARREL_SHIFTER)
diff --git a/gcc/config/arc/arc.h b/gcc/config/arc/arc.h
index 8d90975..8c31fb2 100644
--- a/gcc/config/arc/arc.h
+++ b/gcc/config/arc/arc.h
@@ -288,7 +288,7 @@ if (GET_MODE_CLASS (MODE) == MODE_INT \
/* On the ARC the lower address bits are masked to 0 as necessary. The chip
won't croak when given an unaligned address, but the insn will still fail
to produce the correct result. */
-#define STRICT_ALIGNMENT 1
+#define STRICT_ALIGNMENT (!unaligned_access && !TARGET_HS)
/* Layout of source language data types. */
--
1.9.1
