[llvm] [AMDGPU] Fix bad removal of s_delay_alu (PR #145728)

[Ana Mihajlovic via llvm-commits]

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@@ -49,9 +49,17 @@ class AMDGPUInsertDelayAlu {
 
   static bool instructionWaitsForSGPRWrites(const MachineInstr &MI) {
     // These instruction types wait for VA_SDST==0 before issuing.
-    const uint64_t VA_SDST_0 = SIInstrFlags::SALU | SIInstrFlags::SMRD;
+    uint64_t MIFlags = MI.getDesc().TSFlags;
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mihajlovicana wrote:

> This function seems to be ignoring the handful of VALU instructions which do read SGPRs? Also inlineasm

VALU->SGPR->VALU doesn't use VA_SDST counter, at least I haven't seen that

https://github.com/llvm/llvm-project/pull/145728