From b757e3c1acbec5173f5ca04eb0cc7cfad7c7cb7e Mon Sep 17 00:00:00 2001 From: "Cui, Lili" Date: Wed, 22 May 2024 14:38:32 +0800 Subject: [PATCH] X86: Remove "i.rex" to eliminate extra conditional branch Resulting code will do better without the extra conditional branch. Remove "i.rex" to eliminate extra conditional branch. gas/ChangeLog: * config/tc-i386.c (establish_rex): Remove i.rex. --- gas/config/tc-i386.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/gas/config/tc-i386.c b/gas/config/tc-i386.c index dc6d8bb9398..cb3d464e97a 100644 --- a/gas/config/tc-i386.c +++ b/gas/config/tc-i386.c @@ -4308,7 +4308,7 @@ static void establish_rex (void) && (i.op[first].regs->reg_flags & RegRex64) != 0) || (i.types[last].bitfield.class == Reg && i.types[last].bitfield.byte && (i.op[last].regs->reg_flags & RegRex64) != 0)) - && !i.rex && !is_apx_rex2_encoding () && !is_any_vex_encoding (&i.tm)) + && !is_apx_rex2_encoding () && !is_any_vex_encoding (&i.tm)) i.rex |= REX_OPCODE; /* For REX/REX2/EVEX prefix instructions, we need to convert old registers -- 2.39.5