From: Andrew Waterman <and...@sifive.com>
2017-11-03 Andrew Waterman <and...@sifive.com>
* config/riscv/riscv.c (riscv_option_override): Conditionally set
TARGET_STRICT_ALIGN based upon -mtune argument.
---
gcc/config/riscv/riscv.c | 10 +++++++---
1 file changed, 7 insertions(+), 3 deletions(-)
diff --git a/gcc/config/riscv/riscv.c b/gcc/config/riscv/riscv.c
index b81a2d29fbfd..f0b05d7eaeda 100644
--- a/gcc/config/riscv/riscv.c
+++ b/gcc/config/riscv/riscv.c
@@ -3772,9 +3772,13 @@ riscv_option_override (void)
/* Use -mtune's setting for slow_unaligned_access, even when optimizing
for size. For architectures that trap and emulate unaligned accesses,
- the performance cost is too great, even for -Os. */
- riscv_slow_unaligned_access_p = (cpu->tune_info->slow_unaligned_access
- || TARGET_STRICT_ALIGN);
+ the performance cost is too great, even for -Os. Similarly, if
+ -m[no-]strict-align is left unspecified, heed -mtune's advice. */
+ riscv_slow_unaligned_access = (cpu->tune_info->slow_unaligned_access
+ || TARGET_STRICT_ALIGN);
+ if ((target_flags_explicit & MASK_STRICT_ALIGN) == 0
+ && cpu->tune_info->slow_unaligned_access)
+ target_flags |= MASK_STRICT_ALIGN;
/* If the user hasn't specified a branch cost, use the processor's
default. */
--
2.13.6
