From: liuhongt <hongtao.liu@intel.com>
Date: Mon, 11 Jan 2021 06:47:49 +0000 (+0800)
Subject: Delete dead code in ix86_expand_sse_comi.
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=240f0a490dae0fb9ef72fa21a93e8088d17fb682;p=gcc.git

Delete dead code in ix86_expand_sse_comi.

d->flag is always 0 for builtins located in
BDESC_FIRST (comi,COMI,...)
...
BDESC_END (COMI, PCMPESTR)

gcc/ChangeLog:
	PR target/98612
	* config/i386/i386-builtins.h (BUILTIN_DESC_SWAP_OPERANDS):
	Deleted.
	* config/i386/i386-expand.c (ix86_expand_sse_comi): Delete
	dead code.
---

diff --git a/gcc/config/i386/i386-builtins.h b/gcc/config/i386/i386-builtins.h
index bb364458878..0641808c7a7 100644
--- a/gcc/config/i386/i386-builtins.h
+++ b/gcc/config/i386/i386-builtins.h
@@ -236,10 +236,6 @@ struct builtin_isa {
 
 /* Bits for builtin_description.flag.  */
 
-/* Set when we don't support the comparison natively, and should
-   swap_comparison in order to support it.  */
-#define BUILTIN_DESC_SWAP_OPERANDS	1
-
 struct builtin_description
 {
   const HOST_WIDE_INT mask;
diff --git a/gcc/config/i386/i386-expand.c b/gcc/config/i386/i386-expand.c
index 85ea2605696..d793e5a5bce 100644
--- a/gcc/config/i386/i386-expand.c
+++ b/gcc/config/i386/i386-expand.c
@@ -8634,11 +8634,6 @@ ix86_expand_sse_comi (const struct builtin_description *d, tree exp,
   if (VECTOR_MODE_P (mode1))
     op1 = safe_vector_operand (op1, mode1);
 
-  /* Swap operands if we have a comparison that isn't available in
-     hardware.  */
-  if (d->flag & BUILTIN_DESC_SWAP_OPERANDS)
-    std::swap (op0, op1);
-
   target = gen_reg_rtx (SImode);
   emit_move_insn (target, const0_rtx);
   target = gen_rtx_SUBREG (QImode, target, 0);