Revert "[AMDGPU] Precommit lit test for llvm#72140."

This reverts commit 8f7e9f3.

Change-Id: Ibfb2589ae430d99ec16e482bad5f585f5af100b5

llvm/lib/Target/AMDGPU/SIInstrInfo.cpp

@@ -8919,16 +8919,8 @@ unsigned SIInstrInfo::getLiveRangeSplitOpcode(Register SrcReg,
 }
 
 bool SIInstrInfo::isBasicBlockPrologue(const MachineInstr &MI) const {
-  // We need to handle instructions which may be inserted during register
-  // allocation to handle the prolog. The initial prolog instruction may have
-  // been separated from the start of the block by spills and copies inserted
-  // needed by the prolog.
-  uint16_t Opc = MI.getOpcode();
-
-  // FIXME: Copies inserted in the block prolog for live-range split should also
-  // be included.
-  return (isSpillOpcode(Opc) || (!MI.isTerminator() && Opc != AMDGPU::COPY &&
-                                 MI.modifiesRegister(AMDGPU::EXEC, &RI)));
+  return !MI.isTerminator() && MI.getOpcode() != AMDGPU::COPY &&
+         MI.modifiesRegister(AMDGPU::EXEC, &RI);
 }
 
 MachineInstrBuilder

llvm/test/CodeGen/AMDGPU/GlobalISel/image-waterfall-loop-O0.ll

@@ -144,6 +144,8 @@ define <4 x float> @waterfall_loop(<8 x i32> %vgpr_srd) {
 ; CHECK-NEXT:    buffer_store_dword v0, off, s[0:3], s32 ; 4-byte Folded Spill
 ; CHECK-NEXT:    s_mov_b32 exec_lo, s21
 ; CHECK-NEXT:  ; %bb.2: ; in Loop: Header=BB0_1 Depth=1
+; CHECK-NEXT:    buffer_load_dword v0, off, s[0:3], s32 offset:4 ; 4-byte Folded Reload
+; CHECK-NEXT:    buffer_load_dword v1, off, s[0:3], s32 offset:8 ; 4-byte Folded Reload
 ; CHECK-NEXT:    s_or_saveexec_b32 s21, -1
 ; CHECK-NEXT:    buffer_load_dword v2, off, s[0:3], s32 ; 4-byte Folded Reload
 ; CHECK-NEXT:    s_mov_b32 exec_lo, s21
@@ -161,9 +163,6 @@ define <4 x float> @waterfall_loop(<8 x i32> %vgpr_srd) {
 ; CHECK-NEXT:    v_readlane_b32 s17, v2, 1
 ; CHECK-NEXT:    v_readlane_b32 s18, v2, 2
 ; CHECK-NEXT:    v_readlane_b32 s19, v2, 3
-; CHECK-NEXT:    buffer_load_dword v0, off, s[0:3], s32 offset:4 ; 4-byte Folded Reload
-; CHECK-NEXT:    buffer_load_dword v1, off, s[0:3], s32 offset:8 ; 4-byte Folded Reload
-; CHECK-NEXT:    s_waitcnt vmcnt(0)
 ; CHECK-NEXT:    image_sample v0, v[0:1], s[8:15], s[16:19] dmask:0x1 dim:SQ_RSRC_IMG_2D
 ; CHECK-NEXT:    s_waitcnt vmcnt(0)
 ; CHECK-NEXT:    buffer_store_dword v0, off, s[0:3], s32 offset:76 ; 4-byte Folded Spill

llvm/test/CodeGen/AMDGPU/cross-block-use-is-not-abi-copy.ll

@@ -149,8 +149,8 @@ define { i32, half } @call_split_type_used_outside_block_struct() #0 {
 ; GCN-NEXT:    s_addc_u32 s17, s17, func_struct@rel32@hi+12
 ; GCN-NEXT:    s_swappc_b64 s[30:31], s[16:17]
 ; GCN-NEXT:    v_readlane_b32 s30, v40, 0
-; GCN-NEXT:    v_readlane_b32 s31, v40, 1
 ; GCN-NEXT:    v_mov_b32_e32 v1, v4
+; GCN-NEXT:    v_readlane_b32 s31, v40, 1
 ; GCN-NEXT:    v_readlane_b32 s4, v40, 2
 ; GCN-NEXT:    s_or_saveexec_b64 s[6:7], -1
 ; GCN-NEXT:    buffer_load_dword v40, off, s[0:3], s33 ; 4-byte Folded Reload