R600: Remove broken atomicrmw patterns

inc/dec are not add/sub of 1.

Author: arsenm

llvm/lib/Target/AMDGPU/EvergreenInstructions.td

@@ -310,14 +310,6 @@ multiclass AtomicPat<Instruction inst_noret,
             (EXTRACT_SUBREG (inst_noret
               (INSERT_SUBREG (v4i32 (IMPLICIT_DEF)), $data, sub0), $ptr), sub1)>;
 }
-multiclass AtomicIncDecPat<Instruction inst_noret,
-                           SDPatternOperator node_noret, int C> {
-  // FIXME: Add _RTN version. We need per WI scratch location to store the old value
-  // EXTRACT_SUBREG here is dummy, we know the node has no uses
-  def : EGOrCaymanPat<(i32 (node_noret i32:$ptr, C)),
-            (EXTRACT_SUBREG (inst_noret
-              (INSERT_SUBREG (v4i32 (IMPLICIT_DEF)), (MOV_IMM_I32 -1), sub0), $ptr), sub1)>;
-}
 
 // CMPSWAP is pattern is special
 // EXTRACT_SUBREG here is dummy, we know the node has no uses
@@ -349,14 +341,6 @@ defm AtomicOrPat : AtomicPat <RAT_ATOMIC_OR_NORET,
                               atomic_load_or_global_noret_32>;
 defm AtomicXorPat : AtomicPat <RAT_ATOMIC_XOR_NORET,
                                atomic_load_xor_global_noret_32>;
-defm AtomicIncAddPat : AtomicIncDecPat <RAT_ATOMIC_INC_UINT_NORET,
-                                        atomic_load_add_global_noret_32, 1>;
-defm AtomicIncSubPat : AtomicIncDecPat <RAT_ATOMIC_INC_UINT_NORET,
-                                        atomic_load_sub_global_noret_32, -1>;
-defm AtomicDecAddPat : AtomicIncDecPat <RAT_ATOMIC_DEC_UINT_NORET,
-                                        atomic_load_add_global_noret_32, -1>;
-defm AtomicDecSubPat : AtomicIncDecPat <RAT_ATOMIC_DEC_UINT_NORET,
-                                        atomic_load_sub_global_noret_32, 1>;
 
 // Should be predicated on FeatureFP64
 // def FMA_64 : R600_3OP <

llvm/test/CodeGen/AMDGPU/r600.global_atomics.ll

@@ -505,36 +505,36 @@ entry:
   ret void
 }
 
-; FUNC-LABEL: {{^}}atomic_inc_add
-; EG: MEM_RAT ATOMIC_INC_UINT
-define amdgpu_kernel void @atomic_inc_add(i32 addrspace(1)* %out) {
+; FUNC-LABEL: {{^}}atomic_add_1
+; EG: MEM_RAT ATOMIC_ADD
+define amdgpu_kernel void @atomic_add_1(i32 addrspace(1)* %out) {
 entry:
   %gep = getelementptr i32, i32 addrspace(1)* %out, i64 4
   %val = atomicrmw volatile add i32 addrspace(1)* %gep, i32 1 seq_cst
   ret void
 }
 
-; FUNC-LABEL: {{^}}atomic_dec_add
-; EG: MEM_RAT ATOMIC_DEC_UINT
-define amdgpu_kernel void @atomic_dec_add(i32 addrspace(1)* %out) {
+; FUNC-LABEL: {{^}}atomic_add_neg1
+; EG: MEM_RAT ATOMIC_ADD
+define amdgpu_kernel void @atomic_add_neg1(i32 addrspace(1)* %out) {
 entry:
   %gep = getelementptr i32, i32 addrspace(1)* %out, i64 4
   %val = atomicrmw volatile add i32 addrspace(1)* %gep, i32 -1 seq_cst
   ret void
 }
 
-; FUNC-LABEL: {{^}}atomic_inc_sub
-; EG: MEM_RAT ATOMIC_INC_UINT
-define amdgpu_kernel void @atomic_inc_sub(i32 addrspace(1)* %out) {
+; FUNC-LABEL: {{^}}atomic_sub_neg1
+; EG: MEM_RAT ATOMIC_SUB
+define amdgpu_kernel void @atomic_sub_neg1(i32 addrspace(1)* %out) {
 entry:
   %gep = getelementptr i32, i32 addrspace(1)* %out, i64 4
   %val = atomicrmw volatile sub i32 addrspace(1)* %gep, i32 -1 seq_cst
   ret void
 }
 
-; FUNC-LABEL: {{^}}atomic_dec_sub
-; EG: MEM_RAT ATOMIC_DEC_UINT
-define amdgpu_kernel void @atomic_dec_sub(i32 addrspace(1)* %out) {
+; FUNC-LABEL: {{^}}atomic_sub_1
+; EG: MEM_RAT ATOMIC_SUB
+define amdgpu_kernel void @atomic_sub_1(i32 addrspace(1)* %out) {
 entry:
   %gep = getelementptr i32, i32 addrspace(1)* %out, i64 4
   %val = atomicrmw volatile sub i32 addrspace(1)* %gep, i32 1 seq_cst