[llvm] [X86][MC] Error out for CMPCCXADD on 32 bit targets. (PR #88672)

[Freddy Ye via llvm-commits]

https://github.com/FreddyLeaf created https://github.com/llvm/llvm-project/pull/88672

This resolves issue #88501.


>From 654704b35ee2589f5f62926d17a97fc70d9fefea Mon Sep 17 00:00:00 2001
From: Freddy Ye <freddy.ye at intel.com>
Date: Mon, 15 Apr 2024 09:24:47 +0800
Subject: [PATCH] [X86][MC] Error out for CMPCCXADD on 32 bit targets.

This resolves issue #88501.
---
 llvm/lib/Target/X86/X86InstrAsmAlias.td | 20 +++++++++++---------
 1 file changed, 11 insertions(+), 9 deletions(-)

diff --git a/llvm/lib/Target/X86/X86InstrAsmAlias.td b/llvm/lib/Target/X86/X86InstrAsmAlias.td
index d06a0c79b46bbb..fbe95794a209f6 100644
--- a/llvm/lib/Target/X86/X86InstrAsmAlias.td
+++ b/llvm/lib/Target/X86/X86InstrAsmAlias.td
@@ -51,15 +51,17 @@ def : InstAlias<"invlpgb\t{%rax, %edx|rax, edx}", (INVLPGB64)>, Requires<[In64Bi
 
 // CMPCCXADD Instructions Alias
 multiclass CMPCCXADD_Aliases<string Cond, int CC> {
-  def : InstAlias<"cmp"#Cond#"xadd"#"\t{$src3, $dst, $dstsrc2|$dstsrc2, $dst, $src3}",
-                  (CMPCCXADDmr32 GR32:$dst, i32mem:$dstsrc2, GR32:$src3, CC), 0>;
-  def : InstAlias<"cmp"#Cond#"xadd"#"\t{$src3, $dst, $dstsrc2|$dstsrc2, $dst, $src3}",
-                  (CMPCCXADDmr64 GR64:$dst, i64mem:$dstsrc2, GR64:$src3, CC), 0>;
-
-  def : InstAlias<"cmp"#Cond#"xadd"#"\t{$src3, $dst, $dstsrc2|$dstsrc2, $dst, $src3}",
-                  (CMPCCXADDmr32_EVEX GR32:$dst, i32mem:$dstsrc2, GR32:$src3, CC), 0>;
-  def : InstAlias<"cmp"#Cond#"xadd"#"\t{$src3, $dst, $dstsrc2|$dstsrc2, $dst, $src3}",
-                  (CMPCCXADDmr64_EVEX GR64:$dst, i64mem:$dstsrc2, GR64:$src3, CC), 0>;
+  let Predicates = [In64BitMode] in {
+    def : InstAlias<"cmp"#Cond#"xadd"#"\t{$src3, $dst, $dstsrc2|$dstsrc2, $dst, $src3}",
+                    (CMPCCXADDmr32 GR32:$dst, i32mem:$dstsrc2, GR32:$src3, CC), 0>;
+    def : InstAlias<"cmp"#Cond#"xadd"#"\t{$src3, $dst, $dstsrc2|$dstsrc2, $dst, $src3}",
+                    (CMPCCXADDmr64 GR64:$dst, i64mem:$dstsrc2, GR64:$src3, CC), 0>;
+
+    def : InstAlias<"cmp"#Cond#"xadd"#"\t{$src3, $dst, $dstsrc2|$dstsrc2, $dst, $src3}",
+                    (CMPCCXADDmr32_EVEX GR32:$dst, i32mem:$dstsrc2, GR32:$src3, CC), 0>;
+    def : InstAlias<"cmp"#Cond#"xadd"#"\t{$src3, $dst, $dstsrc2|$dstsrc2, $dst, $src3}",
+                    (CMPCCXADDmr64_EVEX GR64:$dst, i64mem:$dstsrc2, GR64:$src3, CC), 0>;
+  }
 }
 
 // CCMP Instructions Alias