[AMDGPU][True16][MC] Copy True16Predicate from pseudo to real in VOP1 (llvm#116098)

This is a necessary change for consistency and an upcoming patch.
Cleanup an affected extra whitespace and wrong CHECK prefix in
v_swap_b16.

Author: Sisyph

llvm/lib/Target/AMDGPU/VOP1Instructions.td

@@ -76,6 +76,7 @@ class VOP1_Real <VOP1_Pseudo ps, int EncodingFamily, string real_name = ps.Mnemo
   // copy relevant pseudo op flags
   let SubtargetPredicate = ps.SubtargetPredicate;
   let OtherPredicates    = ps.OtherPredicates;
+  let True16Predicate    = ps.True16Predicate;
   let AsmMatchConverter  = ps.AsmMatchConverter;
   let AsmVariantName     = ps.AsmVariantName;
   let Constraints        = ps.Constraints;
@@ -735,7 +736,7 @@ def VOP_SWAP_I16 : VOPProfile_True16<VOP_I16_I16> {
                      VOPSrcEncodedDstOperand_t16Lo128:$vdst1);
   let Ins32 = (ins VOPSrcEncodedDstOperand_t16Lo128:$src0,
                    VOPDstOperand_t16Lo128:$src1);
-  let Asm32 = " $vdst, $src0";
+  let Asm32 = "$vdst, $src0";
 }
 
 let SubtargetPredicate = isGFX11Plus in {

llvm/test/MC/AMDGPU/gfx12_asm_vop1.s

@@ -3555,13 +3555,13 @@ v_sqrt_f64 v[254:255], 0xaf123456
 // GFX12: v_sqrt_f64_e32 v[254:255], 0xaf123456 ; encoding: [0xff,0x68,0xfc,0x7f,0x56,0x34,0x12,0xaf]
 
 v_swap_b16 v5.l, v1.h
-// GFX12: v_swap_b16  v5.l, v1.h ; encoding: [0x81,0xcd,0x0a,0x7e]
+// GFX12: v_swap_b16 v5.l, v1.h ; encoding: [0x81,0xcd,0x0a,0x7e]
 
 v_swap_b16 v5.h, v1.l
-// GFX12: v_swap_b16  v5.h, v1.l ; encoding: [0x01,0xcd,0x0a,0x7f]
+// GFX12: v_swap_b16 v5.h, v1.l ; encoding: [0x01,0xcd,0x0a,0x7f]
 
 v_swap_b16 v127.l, v127.l
-// GFX12: v_swap_b16  v127.l, v127.l ; encoding: [0x7f,0xcd,0xfe,0x7e]
+// GFX12: v_swap_b16 v127.l, v127.l ; encoding: [0x7f,0xcd,0xfe,0x7e]
 
 v_swap_b32 v5, v1
 // GFX12: v_swap_b32 v5, v1 ; encoding: [0x01,0xcb,0x0a,0x7e]

llvm/test/MC/Disassembler/AMDGPU/gfx11_dasm_vop1.txt

@@ -3499,10 +3499,10 @@
 # GFX11: v_sqrt_f64_e32 v[254:255], 0xaf123456   ; encoding: [0xff,0x68,0xfc,0x7f,0x56,0x34,0x12,0xaf]
 0xff,0x68,0xfc,0x7f,0x56,0x34,0x12,0xaf
 
-# GFX11-TRUE16: v_swap_b16 v5.l, v1.h            ; encoding: [0x81,0xcd,0x0a,0x7e]
+# GFX11-REAL16: v_swap_b16 v5.l, v1.h                   ; encoding: [0x81,0xcd,0x0a,0x7e]
 0x81,0xcd,0x0a,0x7e
 
-# GFX11-TRUE16: v_swap_b16 v5.h, v1.l            ; encoding: [0x01,0xcd,0x0a,0x7f]
+# GFX11-REAL16: v_swap_b16 v5.h, v1.l                   ; encoding: [0x01,0xcd,0x0a,0x7f]
 0x01,0xcd,0x0a,0x7f
 
 # GFX11: v_swap_b32 v5, v1                       ; encoding: [0x01,0xcb,0x0a,0x7e]