From: Jakub Jelinek <jakub@redhat.com>
To: Richard Biener <richard.guenther@gmail.com>
Cc: Jeff Law <law@redhat.com>,
Segher Boessenkool <segher@kernel.crashing.org>,
Richard Biener <rguenther@suse.de>,
Eric Botcazou <ebotcazou@adacore.com>,
gcc-patches@gcc.gnu.org
Subject: Re: [PATCH] Reenable CSE of non-volatile inline asm (PR rtl-optimization/63637)
Date: Thu, 15 Jan 2015 09:50:00 -0000 [thread overview]
Message-ID: <20150115084347.GC1405@tucnak.redhat.com> (raw)
In-Reply-To: <20150115081330.GB1405@tucnak.redhat.com>
On Thu, Jan 15, 2015 at 09:13:30AM +0100, Jakub Jelinek wrote:
> differently. Just trying to grep for a few:
> glibc:
> ./sysdeps/alpha/bits/atomic.h:# define atomic_full_barrier() __asm ("mb" : : : "memory");
> ./sysdeps/alpha/bits/atomic.h:# define atomic_read_barrier() __asm ("mb" : : : "memory");
> ./sysdeps/alpha/bits/atomic.h:# define atomic_write_barrier() __asm ("wmb" : : : "memory");
> ./sysdeps/sparc/sparc32/bits/atomic.h:# define atomic_full_barrier() __asm ("" ::: "memory")
> ./sysdeps/powerpc/powerpc32/bits/atomic.h:# define atomic_read_barrier() __asm ("lwsync" ::: "memory")
> ./sysdeps/powerpc/powerpc32/bits/atomic.h:# define atomic_read_barrier() __asm ("sync" ::: "memory")
> ./sysdeps/powerpc/powerpc64/bits/atomic.h:#define atomic_read_barrier() __asm ("lwsync" ::: "memory")
> ./sysdeps/powerpc/bits/atomic.h:#define atomic_full_barrier() __asm ("sync" ::: "memory")
> ./sysdeps/powerpc/bits/atomic.h:#define atomic_write_barrier() __asm ("eieio" ::: "memory")
> ./sysdeps/generic/malloc-machine.h:# define atomic_full_barrier() __asm ("" ::: "memory")
> ./elf/tst-tlsmod3.c: asm ("" ::: "memory");
> ./elf/tst-tlsmod4.c: asm ("" ::: "memory");
> ./elf/tst-tlsmod1.c: asm ("" ::: "memory");
> ./elf/tst-tlsmod2.c: asm ("" ::: "memory");
> ./include/atomic.h:# define atomic_full_barrier() __asm ("" ::: "memory")
> linux kernel:
> ./arch/arm/mach-omap2/pm24xx.c: asm("mcr p15, 0, %0, c7, c0, 4" : : "r" (zero) : "memory", "cc");
> ./arch/arm/include/asm/irqflags.h:#define local_fiq_enable() __asm__("cpsie f @ __stf" : : : "memory", "cc")
> ./arch/arm/include/asm/irqflags.h:#define local_fiq_disable() __asm__("cpsid f @ __clf" : : : "memory", "cc")
> ./arch/x86/include/asm/uaccess_64.h: asm("":::"memory");
> ./arch/x86/include/asm/uaccess_64.h: asm("":::"memory");
> ./arch/x86/include/asm/segment.h: asm("mov %%" #seg ",%0":"=r" (value) : : "memory")
> ./arch/x86/include/asm/stackprotector.h: asm("mov %0, %%gs" : : "r" (__KERNEL_STACK_CANARY) : "memory");
> ./arch/arm64/include/asm/irqflags.h:#define local_fiq_enable() asm("msr daifclr, #1" : : : "memory")
> ./arch/arm64/include/asm/irqflags.h:#define local_fiq_disable() asm("msr daifset, #1" : : : "memory")
> ./arch/arm64/include/asm/irqflags.h:#define local_async_enable() asm("msr daifclr, #4" : : : "memory")
> ./arch/arm64/include/asm/irqflags.h:#define local_async_disable() asm("msr daifset, #4" : : : "memory")
> ./arch/tile/lib/memcpy_64.c: __asm__ ("" : : : "memory");
> ./arch/tile/lib/memcpy_64.c: __asm__ ("" : : : "memory");
> ./arch/tile/include/hv/netio_intf.h: __asm__("" : : : "memory");
> ./drivers/net/ethernet/sgi/ioc3-eth.c: __asm__("sync" ::: "memory")
> ./lib/sha1.c: #define setW(x, val) do { W(x) = (val); __asm__("":::"memory"); } while (0)
Oops, bad grep, only the
./arch/x86/include/asm/segment.h: asm("mov %%" #seg ",%0":"=r" (value) : : "memory")
is what we are talking about actually, asm without outputs is implicitly
volatile.
Jakub
next prev parent reply other threads:[~2015-01-15 8:43 UTC|newest]
Thread overview: 22+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-01-13 16:22 Jakub Jelinek
2015-01-13 17:06 ` Segher Boessenkool
2015-01-13 20:02 ` Jeff Law
2015-01-13 20:29 ` Jakub Jelinek
2015-01-13 22:28 ` Jeff Law
2015-01-14 3:44 ` Segher Boessenkool
2015-01-14 6:52 ` Jeff Law
2015-01-14 15:40 ` Segher Boessenkool
2015-01-15 6:46 ` Jeff Law
2015-01-15 7:54 ` Richard Biener
2015-01-15 8:40 ` Jakub Jelinek
2015-01-15 8:43 ` Richard Biener
2015-01-15 9:50 ` Jakub Jelinek [this message]
2015-01-15 18:22 ` Jeff Law
2015-01-23 21:39 ` Richard Henderson
2015-01-23 22:53 ` Segher Boessenkool
2015-01-23 23:12 ` Jakub Jelinek
2015-01-24 7:23 ` Segher Boessenkool
2015-01-24 14:39 ` Richard Sandiford
2015-01-13 22:42 ` Segher Boessenkool
2015-01-14 0:40 ` Segher Boessenkool
2015-01-14 7:12 ` Jeff Law
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