[Mesa-dev] [PATCH] llvmpipe: add cc clobber to inline asm

[Grazvydas Ignotas]

The bsr instruction modifies flags, so that needs to be indicated to the
compiler. No effect on generated code, but still needed for correctness.
---
 src/gallium/drivers/llvmpipe/lp_setup_tri.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/src/gallium/drivers/llvmpipe/lp_setup_tri.c b/src/gallium/drivers/llvmpipe/lp_setup_tri.c
index cec6198ec63..1852ec05d56 100644
--- a/src/gallium/drivers/llvmpipe/lp_setup_tri.c
+++ b/src/gallium/drivers/llvmpipe/lp_setup_tri.c
@@ -732,11 +732,12 @@ floor_pot(uint32_t n)
    if (n == 0)
       return 0;
 
    __asm__("bsr %1,%0"
           : "=r" (n)
-          : "rm" (n));
+          : "rm" (n)
+          : "cc");
    return 1 << n;
 #else
    n |= (n >>  1);
    n |= (n >>  2);
    n |= (n >>  4);
-- 
2.17.1