8305690: [X86] Do not emit two REX prefixes in Assembler::prefix

Reviewed-by: kvn, thartmann
2023-04-18 08:01:32 +00:00 · 2023-04-18 08:01:32 +00:00 · 49726ee3a9
commit 49726ee3a9
parent 445ebef437
1 changed files with 1 additions and 1 deletions
--- a/src/hotspot/cpu/x86/assembler_x86.cpp
+++ b/src/hotspot/cpu/x86/assembler_x86.cpp
@ -12547,7 +12547,7 @@ void Assembler::prefix(Register dst, Address adr, Prefix p) {
    if (adr.index_needs_rex()) {
      assert(false, "prefix(Register dst, Address adr, Prefix p) does not support handling of an X");
    } else {
-      prefix(REX_B);
+      p = (Prefix)(p | REX_B);
    }
  } else {
    if (adr.index_needs_rex()) {