From caf1c1cd1253a847644744e3d6df3f98051ef024 Mon Sep 17 00:00:00 2001 From: Andrew Waterman Date: Sun, 5 Nov 2017 00:39:01 +0000 Subject: [PATCH] RISC-V: If -m[no-]strict-align is not passed, assume its value from -mtune 2017-11-04 Andrew Waterman * config/riscv/riscv.c (riscv_option_override): Conditionally set TARGET_STRICT_ALIGN based upon -mtune argument. From-SVN: r254417 --- gcc/ChangeLog | 5 +++++ gcc/config/riscv/riscv.c | 6 +++++- 2 files changed, 10 insertions(+), 1 deletion(-) diff --git a/gcc/ChangeLog b/gcc/ChangeLog index 285ac2014df..09b0cd7ca03 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -1,3 +1,8 @@ +2017-11-04 Andrew Waterman + + * config/riscv/riscv.c (riscv_option_override): Conditionally set + TARGET_STRICT_ALIGN based upon -mtune argument. + 2017-11-04 Andrew Waterman * config/riscv/riscv.h (SLOW_BYTE_ACCESS): Change to 1. diff --git a/gcc/config/riscv/riscv.c b/gcc/config/riscv/riscv.c index b81a2d29fbf..52bbc25d0cc 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. */ + 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_p = (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. */ -- 2.30.2