Mercurial > hg > graal-jvmci-8

diff src/cpu/x86/vm/c1_MacroAssembler_x86.cpp @ 23050:e8260b6328fb

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8068945: Use RBP register as proper frame pointer in JIT compiled code on x86 Summary: Introduce the PreserveFramePointer flag to control if RBP is used as the frame pointer or as a general purpose register. Reviewed-by: kvn, roland, dlong, enevill, shade
author zmajo
date Fri, 29 May 2015 10:58:45 +0200
parents 0bf37f737702
children dd9cc155639c
line wrap: on
line diff
--- a/src/cpu/x86/vm/c1_MacroAssembler_x86.cpp	Fri Mar 27 10:57:42 2015 +0100
+++ b/src/cpu/x86/vm/c1_MacroAssembler_x86.cpp	Fri May 29 10:58:45 2015 +0200
@@ -359,6 +359,9 @@
   generate_stack_overflow_check(bang_size_in_bytes);
 
   push(rbp);
+  if (PreserveFramePointer) {
+    mov(rbp, rsp);
+  }
 #ifdef TIERED
   // c2 leaves fpu stack dirty. Clean it on entry
   if (UseSSE < 2 ) {