[llvm] [RISCV] Add compress patterns for qc.extu and qc.mvltui (PR #140682)

[Sam Elliott via llvm-commits]

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@@ -1489,6 +1489,8 @@ def : CompressPat<(QC_E_SW GPR:$rs2, GPRMem:$rs1, simm12:$imm12),
 let Predicates = [HasVendorXqcicm, IsRV32] in {
 def : CompressPat<(QC_MVEQI GPRC:$rd, GPRC:$rd, 0, GPRC:$rs1),
                   (QC_C_MVEQZ GPRC:$rd, GPRC:$rs1)>;
+def : CompressPat<(QC_MVLTUI GPRC:$rd, GPRC:$rd, 1, GPRC:$rs1),
+                  (QC_C_MVEQZ GPRC:$rd, GPRC:$rs1)>;
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lenary wrote:

one of these needs to be `isCompressOnly = true`, or the decompression might change in the future.

https://github.com/llvm/llvm-project/pull/140682