Author: jhibbits
Date: Sat Nov 16 16:27:31 2019
New Revision: 354775
URL: https://svnweb.freebsd.org/changeset/base/354775
Log:
powerpcspe: Mark asm statement in spe_save_reg_high as clobbering memory
Modern gcc errors that "'vec[0]' is used uninitialized in this function"
without us telling it that vec is clobbered. Neither clang nor gcc 4.2.1
error on the existing construct.
Submitted by: bdragon
Modified:
head/sys/powerpc/booke/spe.c
Modified: head/sys/powerpc/booke/spe.c
==============================================================================
--- head/sys/powerpc/booke/spe.c Sat Nov 16 12:00:22 2019
(r354774)
+++ head/sys/powerpc/booke/spe.c Sat Nov 16 16:27:31 2019
(r354775)
@@ -426,7 +426,7 @@ spe_save_reg_high(int reg)
{
uint32_t vec[2];
#define EVSTDW(n) case n: __asm __volatile ("evstdw %1,0(%0)" \
- :: "b"(vec), "n"(n)); break;
+ :: "b"(vec), "n"(n) : "memory"); break;
switch (reg) {
EVSTDW(0); EVSTDW(1); EVSTDW(2); EVSTDW(3);
EVSTDW(4); EVSTDW(5); EVSTDW(6); EVSTDW(7);
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