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[Linux] Fix Value::set_zero() on release 

Disable optimization on set zero to prevent clang from vectorizing the
assigment to zero which would use different registers than expected.
With -O0: RAX. With -O1: RDI.
This commit is contained in:
Sandy Carter 2019-03-09 22:01:01 -05:00
parent 8817975912
commit ee7f68a85f
1 changed files with 9 additions and 1 deletions
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10
src/xenia/cpu/hir/value.h
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@ -16,6 +16,12 @@
#include "xenia/cpu/backend/machine_info.h"
#include "xenia/cpu/hir/opcodes.h"
#if XE_PLATFORM_LINUX
#define OPTNONE __attribute__((optnone))
#else
#define OPTNONE
#endif // XE_PLATFORM_LINUX
namespace xe {
namespace cpu {
namespace hir {
@ -109,7 +115,9 @@ class Value {
Use* AddUse(Arena* arena, Instr* instr);
void RemoveUse(Use* use);
void set_zero(TypeName new_type) {
// Set optnone to prevent clang from vectorizing the assignment to 0 which
// would happen on different registers.
void set_zero(TypeName new_type) OPTNONE {
type = new_type;
flags |= VALUE_IS_CONSTANT;
constant.v128.low = constant.v128.high = 0;