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8178033: C1 crashes with -XX:UseAVX = 3: "not a mov [reg+offs], reg instruction"

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Skip the EVEX prefix such that the instruction address points to the prefixed opcode.

Reviewed-by: kvn, mcberg
This commit is contained in:
Tobias Hartmann 2017-04-06 08:19:42 +02:00
parent d28f63fb9e
commit a8a97e6625
3 changed files with 6 additions and 1 deletions
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2
hotspot/src/cpu/x86/vm/assembler_x86.cpp
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@ -917,7 +917,7 @@ address Assembler::locate_operand(address inst, WhichOperand which) {
break;
case 0x62: // EVEX_4bytes
assert((UseAVX > 0), "shouldn't have EVEX prefix");
assert(VM_Version::supports_evex(), "shouldn't have EVEX prefix");
assert(ip == inst+1, "no prefixes allowed");
// no EVEX collisions, all instructions that have 0x62 opcodes
// have EVEX versions and are subopcodes of 0x66