8320209: VectorMaskGen clobbers rflags on x86_64

Backport-of: b05e69f789fa8c9a5320be5a841317abd3b3a235
openjdk · Nov 21, 2023 · 21a003a · 21a003a · openjdk-notifier · Nov 21, 2023
1 parent 689b90d
commit 21a003a
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
@@ -8985,9 +8985,9 @@ 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);