Currently -march=native selects -march=broadwell on Kaby Lake systems,
since its model numbers are missing from the switch statement. It falls
back to the default case and chooses -march=broadwell because of the
presence of the ADX instruction set.
gcc/
* config/i386/driver-i386.c (host_detect_local_cpu): Add Kaby
Lake models to skylake case.
gcc/testsuite/
* gcc.target/i386/builtin_target.c: Add Kaby Lake models to
skylake check.
libgcc/
* config/i386/cpuinfo.c (get_intel_cpu): Add Kaby Lake models to
skylake case.
---
gcc/config/i386/driver-i386.c | 3 +++
gcc/testsuite/gcc.target/i386/builtin_target.c | 3 +++
libgcc/config/i386/cpuinfo.c | 3 +++
3 files changed, 9 insertions(+)
diff --git a/gcc/config/i386/driver-i386.c b/gcc/config/i386/driver-i386.c
index 6c812514239..09faad0af0e 100644
--- a/gcc/config/i386/driver-i386.c
+++ b/gcc/config/i386/driver-i386.c
@@ -781,6 +781,9 @@ const char *host_detect_local_cpu (int argc, const char
**argv)
case 0x4e:
case 0x5e:
/* Skylake. */
+ case 0x8e:
+ case 0x9e:
+ /* Kaby Lake. */
cpu = "skylake";
break;
case 0x57:
diff --git a/gcc/testsuite/gcc.target/i386/builtin_target.c
b/gcc/testsuite/gcc.target/i386/builtin_target.c
index 374f0292453..9c190eb7ebc 100644
--- a/gcc/testsuite/gcc.target/i386/builtin_target.c
+++ b/gcc/testsuite/gcc.target/i386/builtin_target.c
@@ -88,6 +88,9 @@ check_intel_cpu_model (unsigned int family, unsigned int
model,
case 0x4e:
case 0x5e:
/* Skylake. */
+ case 0x8e:
+ case 0x9e:
+ /* Kaby Lake. */
assert (__builtin_cpu_is ("corei7"));
assert (__builtin_cpu_is ("skylake"));
break;
diff --git a/libgcc/config/i386/cpuinfo.c b/libgcc/config/i386/cpuinfo.c
index a1dc011525f..b008fb6e396 100644
--- a/libgcc/config/i386/cpuinfo.c
+++ b/libgcc/config/i386/cpuinfo.c
@@ -183,6 +183,9 @@ get_intel_cpu (unsigned int family, unsigned int model,
unsigned int brand_id)
case 0x4e:
case 0x5e:
/* Skylake. */
+ case 0x8e:
+ case 0x9e:
+ /* Kaby Lake. */
__cpu_model.__cpu_type = INTEL_COREI7;
__cpu_model.__cpu_subtype = INTEL_COREI7_SKYLAKE;
break;
--
2.13.0
