[AMDGPU][MC] Instructions not to be supported in GFX940 (#109225)

Buffer_store_lds_dword, buffer_wbinvl1, and buffer_wbinvl1_vol are
obsolete in GFX940 and should not be supported.

Author: jwanggit86

llvm/lib/Target/AMDGPU/AMDGPU.td

@@ -1900,6 +1900,10 @@ def isGFX940Plus :
   Predicate<"Subtarget->hasGFX940Insts()">,
   AssemblerPredicate<(all_of FeatureGFX940Insts)>;
 
+def isNotGFX940Plus :
+  Predicate<"!Subtarget->hasGFX940Insts()">,
+  AssemblerPredicate<(all_of (not FeatureGFX940Insts))>;
+
 def isGFX8GFX9NotGFX940 :
   Predicate<"!Subtarget->hasGFX940Insts() &&"
             "(Subtarget->getGeneration() == AMDGPUSubtarget::VOLCANIC_ISLANDS ||"

llvm/lib/Target/AMDGPU/BUFInstructions.td

@@ -1132,7 +1132,7 @@ let OtherPredicates = [HasGFX10_BEncoding] in {
   >;
 }
 
-let SubtargetPredicate = isGFX8GFX9 in {
+let SubtargetPredicate = isGFX8GFX9NotGFX940 in {
 def BUFFER_STORE_LDS_DWORD : MUBUF_Pseudo_Store_Lds <"buffer_store_lds_dword">;
 }
 
@@ -1214,7 +1214,7 @@ defm BUFFER_STORE_FORMAT_D16_HI_X : MUBUF_Pseudo_Stores <
 
 } // End HasD16LoadStore
 
-let SubtargetPredicate = isNotGFX12Plus in
+let SubtargetPredicate = isNotGFX940Plus in
 def BUFFER_WBINVL1 : MUBUF_Invalidate <
   "buffer_wbinvl1", int_amdgcn_buffer_wbinvl1
 >;
@@ -1297,6 +1297,7 @@ let SubtargetPredicate = isGFX7Plus in {
 // Instruction definitions for CI and newer.
 //===----------------------------------------------------------------------===//
 
+let SubtargetPredicate = isNotGFX940Plus in
 def BUFFER_WBINVL1_VOL : MUBUF_Invalidate <"buffer_wbinvl1_vol",
                                            int_amdgcn_buffer_wbinvl1_vol>;
 

llvm/test/MC/AMDGPU/gfx10_unsupported.s

@@ -215,6 +215,9 @@ buffer_store_d16_hi_format_x v1, off, s[12:15], -1 offset:4095
 buffer_store_lds_dword s[4:7], -1 offset:4095 lds
 // CHECK: :[[@LINE-1]]:{{[0-9]+}}: error: instruction not supported on this GPU
 
+buffer_wbinvl1
+// CHECK: :[[@LINE-1]]:{{[0-9]+}}: error: instruction not supported on this GPU
+
 buffer_wbinvl1_vol
 // CHECK: :[[@LINE-1]]:{{[0-9]+}}: error: instruction not supported on this GPU
 

llvm/test/MC/AMDGPU/gfx11_unsupported.s

@@ -34,6 +34,9 @@ buffer_invl2
 buffer_store_lds_dword s[4:7], -1 offset:4095 lds
 // CHECK: :[[@LINE-1]]:{{[0-9]+}}: error: instruction not supported on this GPU
 
+buffer_wbinvl1
+// CHECK: :[[@LINE-1]]:{{[0-9]+}}: error: instruction not supported on this GPU
+
 buffer_wbinvl1_vol
 // CHECK: :[[@LINE-1]]:{{[0-9]+}}: error: instruction not supported on this GPU
 

llvm/test/MC/AMDGPU/gfx12_unsupported.s

@@ -232,9 +232,15 @@ buffer_gl0_inv
 buffer_gl1_inv
 // CHECK: :[[@LINE-1]]:{{[0-9]+}}: error: instruction not supported on this GPU
 
+buffer_store_lds_dword s[4:7], -1 offset:4095 lds
+// CHECK: :[[@LINE-1]]:{{[0-9]+}}: error: instruction not supported on this GPU
+
 buffer_wbinvl1
 // CHECK: :[[@LINE-1]]:{{[0-9]+}}: error: instruction not supported on this GPU
 
+buffer_wbinvl1_vol
+// CHECK: :[[@LINE-1]]:{{[0-9]+}}: error: instruction not supported on this GPU
+
 flat_atomic_csub v1, v[0:1], v2 offset:64 th:TH_ATOMIC_RETURN
 // CHECK: :[[@LINE-1]]:{{[0-9]+}}: error: invalid instruction
 

llvm/test/MC/AMDGPU/gfx940_unsupported.s

@@ -0,0 +1,11 @@
+// RUN: not llvm-mc -triple=amdgcn -mcpu=gfx940 %s 2>&1 | FileCheck --check-prefixes=CHECK --implicit-check-not=error: %s
+
+buffer_store_lds_dword s[4:7], -1 offset:4095 lds
+// CHECK: :[[@LINE-1]]:{{[0-9]+}}: error: instruction not supported on this GPU
+
+buffer_wbinvl1
+// CHECK: :[[@LINE-1]]:{{[0-9]+}}: error: instruction not supported on this GPU
+
+buffer_wbinvl1_vol
+// CHECK: :[[@LINE-1]]:{{[0-9]+}}: error: instruction not supported on this GPU
+