In some cases, compiler can allocate the same register for operand 'res'
and 'vecoutptr', resulting in segfault at 'stxvd2x 40,0,%[vecoutptr]'
because base register will contain 1, yielding a false-positive.
This is because output 'res' must be marked as an earlyclobber operand so
it may not overlap an input operand ('vecoutptr').
Signed-off-by: Gustavo Romero <grom...@linux.vnet.ibm.com>
---
tools/testing/selftests/powerpc/tm/tm-vmxcopy.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/tools/testing/selftests/powerpc/tm/tm-vmxcopy.c
b/tools/testing/selftests/powerpc/tm/tm-vmxcopy.c
index 147c6dc..c1e788a 100644
--- a/tools/testing/selftests/powerpc/tm/tm-vmxcopy.c
+++ b/tools/testing/selftests/powerpc/tm/tm-vmxcopy.c
@@ -79,7 +79,7 @@ int test_vmxcopy()
"5:;"
"stxvd2x 40,0,%[vecoutptr];"
- : [res]"=r"(aborted)
+ : [res]"=&r"(aborted)
: [vecinptr]"r"(&vecin),
[vecoutptr]"r"(&vecout),
[map]"r"(a)
--
2.7.4
