On Tue, Jul 13, 2021 at 09:35:18AM -0700, H.J. Lu wrote:
> Here is the v3 patch. OK for master?
>From my POV LGTM, but please give Uros a chance to chime in.
> From ceab81ef97ab102c410830c41ba7fea911170d1a Mon Sep 17 00:00:00 2001
> From: "H.J. Lu" <hjl.to...@gmail.com>
> Date: Fri, 9 Jul 2021 09:16:01 -0700
> Subject: [PATCH v3] x86: Don't enable UINTR in 32-bit mode
>
> UINTR is available only in 64-bit mode. Since the codegen target is
> unknown when the the gcc driver is processing -march=native, to properly
> handle UINTR for -march=native:
>
> 1. Pass "arch [32|64]" and "tune [32|64]" to host_detect_local_cpu to
> indicate 32-bit and 64-bit codegen.
> 2. Change ix86_option_override_internal to enable UINTR only in 64-bit
> mode for -march=CPU when PTA_CPU includes PTA_UINTR.
>
> gcc/
>
> PR target/101395
> * config/i386/driver-i386.c (host_detect_local_cpu): Check
> "arch [32|64]" and "tune [32|64]" for 32-bit and 64-bit codegen.
> Enable UINTR only for 64-bit codegen.
> * config/i386/i386-options.c
> (ix86_option_override_internal::DEF_PTA): Skip PTA_UINTR if not
> in 64-bit mode.
> * config/i386/i386.h (ARCH_ARG): New.
> (CC1_CPU_SPEC): Pass "[arch|tune] 32" for 32-bit codegen and
> "[arch|tune] 64" for 64-bit codegen.
>
> gcc/testsuite/
>
> PR target/101395
> * gcc.target/i386/pr101395-1.c: New test.
> * gcc.target/i386/pr101395-2.c: Likewise.
> * gcc.target/i386/pr101395-3.c: Likewise.
Jakub
