changeset 55114:6515a96809a1

8224828: aarch64: rflags is not correct after safepoint poll Reviewed-by: aph, adinn Contributed-by: Xiang Yuan <yuanxiang4@huawei.com>
author fyang
date Thu, 30 May 2019 10:29:55 +0800
parents a41029c383bf
children a0d4e61acb6b
files src/hotspot/cpu/aarch64/aarch64.ad src/hotspot/cpu/aarch64/sharedRuntime_aarch64.cpp
diffstat 2 files changed, 4 insertions(+), 4 deletions(-) [+]
line wrap: on
line diff
--- a/src/hotspot/cpu/aarch64/aarch64.ad	Thu May 30 11:00:23 2019 -0700
+++ b/src/hotspot/cpu/aarch64/aarch64.ad	Thu May 30 10:29:55 2019 +0800
@@ -14551,9 +14551,10 @@
 // TODO
 // provide a near and far version of this code
 
-instruct safePoint(iRegP poll)
+instruct safePoint(rFlagsReg cr, iRegP poll)
 %{
   match(SafePoint poll);
+  effect(KILL cr);
 
   format %{
     "ldrw zr, [$poll]\t# Safepoint: poll for GC"
--- a/src/hotspot/cpu/aarch64/sharedRuntime_aarch64.cpp	Thu May 30 11:00:23 2019 -0700
+++ b/src/hotspot/cpu/aarch64/sharedRuntime_aarch64.cpp	Thu May 30 10:29:55 2019 +0800
@@ -135,8 +135,7 @@
   int frame_size_in_words = frame_size_in_bytes / wordSize;
   *total_frame_words = frame_size_in_words;
 
-  // Save registers, fpu state, and flags.
-
+  // Save Integer and Float registers.
   __ enter();
   __ push_CPU_state(save_vectors);
 
@@ -2880,7 +2879,7 @@
   bool cause_return = (poll_type == POLL_AT_RETURN);
   bool save_vectors = (poll_type == POLL_AT_VECTOR_LOOP);
 
-  // Save registers, fpu state, and flags
+  // Save Integer and Float registers.
   map = RegisterSaver::save_live_registers(masm, 0, &frame_size_in_words, save_vectors);
 
   // The following is basically a call_VM.  However, we need the precise