[llvm] [AtomicExpand] Drop explicit datalayout from test (PR #137923)

[Matt Arsenault via llvm-commits]

================
@@ -3,33 +3,55 @@
 ; RUN: opt -mtriple=amdgcn-amd-amdhsa -S -passes=atomic-expand %s | FileCheck -check-prefixes=CHECK,GCN,GFX942 %s
 ; RUN: opt -mtriple=r600-mesa-mesa3d -S -passes=atomic-expand %s | FileCheck  -check-prefixes=CHECK,R600 %s
 
-target datalayout = "e-p:64:64-p1:64:64-p2:32:32-p3:32:32-p4:64:64-p5:32:32-p6:32:32-p7:160:256:256:32-p8:128:128-i64:64-v16:16-v24:32-v32:32-v48:64-v96:128-v192:256-v256:256-v512:512-v1024:1024-v2048:2048-n32:64-S32-A5"
-
 define i16 @test_atomicrmw_xchg_i16_global_agent(ptr addrspace(1) %ptr, i16 %value) {
-; CHECK-LABEL: @test_atomicrmw_xchg_i16_global_agent(
-; CHECK-NEXT:    [[ALIGNEDADDR:%.*]] = call ptr addrspace(1) @llvm.ptrmask.p1.i64(ptr addrspace(1) [[PTR:%.*]], i64 -4)
-; CHECK-NEXT:    [[TMP1:%.*]] = ptrtoint ptr addrspace(1) [[PTR]] to i64
-; CHECK-NEXT:    [[PTRLSB:%.*]] = and i64 [[TMP1]], 3
-; CHECK-NEXT:    [[TMP2:%.*]] = shl i64 [[PTRLSB]], 3
-; CHECK-NEXT:    [[SHIFTAMT:%.*]] = trunc i64 [[TMP2]] to i32
-; CHECK-NEXT:    [[MASK:%.*]] = shl i32 65535, [[SHIFTAMT]]
-; CHECK-NEXT:    [[INV_MASK:%.*]] = xor i32 [[MASK]], -1
-; CHECK-NEXT:    [[TMP3:%.*]] = zext i16 [[VALUE:%.*]] to i32
-; CHECK-NEXT:    [[VALOPERAND_SHIFTED:%.*]] = shl i32 [[TMP3]], [[SHIFTAMT]]
-; CHECK-NEXT:    [[TMP4:%.*]] = load i32, ptr addrspace(1) [[ALIGNEDADDR]], align 4
-; CHECK-NEXT:    br label [[ATOMICRMW_START:%.*]]
-; CHECK:       atomicrmw.start:
-; CHECK-NEXT:    [[LOADED:%.*]] = phi i32 [ [[TMP4]], [[TMP0:%.*]] ], [ [[NEWLOADED:%.*]], [[ATOMICRMW_START]] ]
-; CHECK-NEXT:    [[TMP5:%.*]] = and i32 [[LOADED]], [[INV_MASK]]
-; CHECK-NEXT:    [[TMP6:%.*]] = or i32 [[TMP5]], [[VALOPERAND_SHIFTED]]
-; CHECK-NEXT:    [[TMP7:%.*]] = cmpxchg ptr addrspace(1) [[ALIGNEDADDR]], i32 [[LOADED]], i32 [[TMP6]] syncscope("agent") seq_cst seq_cst, align 4
-; CHECK-NEXT:    [[SUCCESS:%.*]] = extractvalue { i32, i1 } [[TMP7]], 1
-; CHECK-NEXT:    [[NEWLOADED]] = extractvalue { i32, i1 } [[TMP7]], 0
-; CHECK-NEXT:    br i1 [[SUCCESS]], label [[ATOMICRMW_END:%.*]], label [[ATOMICRMW_START]]
-; CHECK:       atomicrmw.end:
-; CHECK-NEXT:    [[SHIFTED:%.*]] = lshr i32 [[NEWLOADED]], [[SHIFTAMT]]
-; CHECK-NEXT:    [[EXTRACTED:%.*]] = trunc i32 [[SHIFTED]] to i16
-; CHECK-NEXT:    ret i16 [[EXTRACTED]]
+; GCN-LABEL: @test_atomicrmw_xchg_i16_global_agent(
----------------
arsenm wrote:

I've looked at this for a while and don't see where the diff is 

https://github.com/llvm/llvm-project/pull/137923