[X86][test] Pre-commit test for #77731

Author: KanRobert

llvm/test/CodeGen/X86/apx/compress-evex.mir

@@ -0,0 +1,46 @@
+# RUN: llc %s -mtriple=x86_64-unknown -mattr=+ndd -start-before=x86-compress-evex -show-mc-encoding -o - | FileCheck %s
+
+...
+---
+name:            ndd_2_non_ndd_xor
+body:             |
+  bb.0.entry:
+    liveins: $rdi, $rsi
+    ; CHECK: xorq    %rsi, %rax, %rax                # encoding: [0x62,0xf4,0xfc,0x18,0x31,0xf0]
+    renamable $rax = ADD64rr_ND killed renamable $rdi, renamable $rsi, implicit-def dead $eflags
+    renamable $rax = XOR64rr_ND killed renamable $rax, killed renamable $rsi, implicit-def dead $eflags
+    RET64 $rax
+
+...
+---
+name:            ndd_2_non_ndd_sub
+body:             |
+  bb.0.entry:
+    liveins: $rdi, $rsi
+    ; CHECK: subq    %rsi, %rax, %rax                # encoding: [0x62,0xf4,0xfc,0x18,0x29,0xf0]
+    renamable $rax = ADD64rr_ND killed renamable $rdi, renamable $rsi, implicit-def dead $eflags
+    renamable $rax = SUB64rr_ND killed renamable $rax, killed renamable $rsi, implicit-def dead $eflags
+    RET64 $rax
+
+...
+---
+name:            ndd_2_non_ndd_commutable
+body:             |
+  bb.0.entry:
+    liveins: $rdi, $rsi
+    ; CHECK: xorq    %rax, %rsi, %rax                # encoding: [0x62,0xf4,0xfc,0x18,0x31,0xc6]
+    renamable $rax = ADD64rr_ND killed renamable $rdi, renamable $rsi, implicit-def dead $eflags
+    renamable $rax = XOR64rr_ND killed renamable $rsi, killed renamable $rax, implicit-def dead $eflags
+    RET64 $rax
+
+...
+---
+name:            ndd_2_non_ndd_incommutable
+body:             |
+  bb.0.entry:
+    liveins: $rdi, $rsi
+    ; CHECK: subq    %rax, %rsi, %rax                # encoding: [0x62,0xf4,0xfc,0x18,0x29,0xc6]
+    renamable $rax = ADD64rr_ND killed renamable $rdi, renamable $rsi, implicit-def dead $eflags
+    renamable $rax = SUB64rr_ND killed renamable $rsi, killed renamable $rax, implicit-def dead $eflags
+    RET64 $rax
+...