src/hotspot/cpu/aarch64/stubGenerator_aarch64.cpp

rev 60615 : 8231441: Initial SVE backend support
Reviewed-by: adinn, pli
Contributed-by: joshua.zhu@arm.com, yang.zhang@arm.com, ningsheng.jian@arm.com

@@ -486,10 +486,15 @@
     __ mov(r19, lr);
     BLOCK_COMMENT("call exception_handler_for_return_address");
     __ call_VM_leaf(CAST_FROM_FN_PTR(address,
                          SharedRuntime::exception_handler_for_return_address),
                     rthread, c_rarg1);
+    if (UseSVE > 0 ) {
+      // Reinitialize the ptrue predicate register, in case the external runtime
+      // call clobbers ptrue reg, as we may return to SVE compiled code.
+      __ reinitialize_ptrue();
+    }
     // we should not really care that lr is no longer the callee
     // address. we saved the value the handler needs in r19 so we can
     // just copy it to r3. however, the C2 handler will push its own
     // frame and then calls into the VM and the VM code asserts that
     // the PC for the frame above the handler belongs to a compiled

@@ -5016,10 +5021,16 @@
     oop_maps->add_gc_map(the_pc - start, map);
 
     __ reset_last_Java_frame(true);
     __ maybe_isb();
 
+    if (UseSVE > 0) {
+      // Reinitialize the ptrue predicate register, in case the external runtime
+      // call clobbers ptrue reg, as we may return to SVE compiled code.
+      __ reinitialize_ptrue();
+    }
+
     __ leave();
 
     // check for pending exceptions
 #ifdef ASSERT
     Label L;