8320209: VectorMaskGen clobbers rflags on x86_64

Reviewed-by: kvn, qamai, jbhateja
openjdk · Nov 16, 2023 · b05e69f · b05e69f · openjdk-notifier · Nov 16, 2023
1 parent f3ed275
commit b05e69f
Showing 1 changed file with 2 additions and 2 deletions.
diff --git a/src/hotspot/cpu/x86/x86.ad b/src/hotspot/cpu/x86/x86.ad
@@ -8990,9 +8990,9 @@ instruct vmask_cmp_node(rRegI dst, vec src1, vec src2, kReg mask, kReg ktmp1, kR
 %}
 
 
-instruct vmask_gen(kReg dst, rRegL len, rRegL temp) %{
+instruct vmask_gen(kReg dst, rRegL len, rRegL temp, rFlagsReg cr) %{
   match(Set dst (VectorMaskGen len));
-  effect(TEMP temp);
+  effect(TEMP temp, KILL cr);
   format %{ "vector_mask_gen32 $dst, $len \t! vector mask generator" %}
   ins_encode %{
     __ genmask($dst$$KRegister, $len$$Register, $temp$$Register);