diff --git a/llvm/lib/Target/RISCV/RISCVInstrInfoXqci.td b/llvm/lib/Target/RISCV/RISCVInstrInfoXqci.td
index 52bd893c881e8..9e46da8203baa 100644
--- a/llvm/lib/Target/RISCV/RISCVInstrInfoXqci.td
+++ b/llvm/lib/Target/RISCV/RISCVInstrInfoXqci.td
@@ -1323,3 +1323,36 @@ def : PatGprNoX0GprNoX0<sshlsat, QC_SHLSAT>;
 
 let Predicates = [HasVendorXqciint, IsRV32] in
 def : Pat<(riscv_mileaveret_glue), (QC_C_MILEAVERET)>;
+
+
+//===----------------------------------------------------------------------===/i
+// Compress Instruction tablegen backend.
+//===----------------------------------------------------------------------===//
+
+let isCompressOnly = true, Predicates = [HasVendorXqcilo, IsRV32] in {
+def : CompressPat<(QC_E_LW GPRC:$rd, GPRCMem:$rs1, uimm7_lsb00:$imm),
+                  (C_LW GPRC:$rd, GPRCMem:$rs1, uimm7_lsb00:$imm)>;
+def : CompressPat<(QC_E_LW GPRNoX0:$rd, SPMem:$rs1,  uimm8_lsb00:$imm),
+                  (C_LWSP GPRNoX0:$rd, SPMem:$rs1, uimm8_lsb00:$imm)>;
+def : CompressPat<(QC_E_LB GPR:$rd, GPRMem:$rs1, simm12:$imm12),
+                  (LB GPR:$rd, GPRMem:$rs1, simm12:$imm12)>;
+def : CompressPat<(QC_E_LBU GPR:$rd, GPRMem:$rs1, simm12:$imm12),
+                  (LBU GPR:$rd, GPRMem:$rs1, simm12:$imm12)>;
+def : CompressPat<(QC_E_LH GPR:$rd, GPRMem:$rs1, simm12:$imm12),
+                  (LH GPR:$rd, GPRMem:$rs1, simm12:$imm12)>;
+def : CompressPat<(QC_E_LHU GPR:$rd, GPRMem:$rs1, simm12:$imm12),
+                  (LHU GPR:$rd, GPRMem:$rs1, simm12:$imm12)>;
+def : CompressPat<(QC_E_LW GPR:$rd, GPRMem:$rs1, simm12:$imm12),
+                  (LW GPR:$rd, GPRMem:$rs1, simm12:$imm12)>;
+
+def : CompressPat<(QC_E_SW GPRC:$rs2, GPRCMem:$rs1, uimm7_lsb00:$imm),
+                  (C_SW GPRC:$rs2, GPRCMem:$rs1, uimm7_lsb00:$imm)>;
+def : CompressPat<(QC_E_SW GPR:$rs2, SPMem:$rs1, uimm8_lsb00:$imm),
+                  (C_SWSP GPR:$rs2, SPMem:$rs1, uimm8_lsb00:$imm)>;
+def : CompressPat<(QC_E_SB GPR:$rs2, GPRMem:$rs1, simm12:$imm12),
+                  (SB GPR:$rs2, GPRMem:$rs1, simm12:$imm12)>;
+def : CompressPat<(QC_E_SH GPR:$rs2, GPRMem:$rs1, simm12:$imm12),
+                  (SH GPR:$rs2, GPRMem:$rs1, simm12:$imm12)>;
+def : CompressPat<(QC_E_SW GPR:$rs2, GPRMem:$rs1, simm12:$imm12),
+                  (SW GPR:$rs2, GPRMem:$rs1, simm12:$imm12)>;
+} // isCompressOnly = true, Predicates = [HasVendorXqcilo, IsRV32]
diff --git a/llvm/test/MC/RISCV/xqcilo-aliases-valid.s b/llvm/test/MC/RISCV/xqcilo-aliases-valid.s
index 44f9bf7e894f7..9c62acdb821dd 100644
--- a/llvm/test/MC/RISCV/xqcilo-aliases-valid.s
+++ b/llvm/test/MC/RISCV/xqcilo-aliases-valid.s
@@ -1,50 +1,52 @@
 # Xqcilo - Qualcomm uC Large Offset Load Store extension
 # RUN: llvm-mc %s -triple=riscv32 -mattr=+experimental-xqcilo -M no-aliases -show-encoding \
-# RUN:     | FileCheck -check-prefixes=CHECK-ENC,CHECK-INST %s
+# RUN:     | FileCheck -check-prefixes=CHECK-ENC,CHECK-INST,CHECK-NOALIAS %s
 # RUN: llvm-mc -filetype=obj -triple riscv32 -mattr=+experimental-xqcilo < %s \
 # RUN:     | llvm-objdump --mattr=+experimental-xqcilo -M no-aliases --no-print-imm-hex -d - \
 # RUN:     | FileCheck -check-prefix=CHECK-INST %s
 # RUN: llvm-mc %s -triple=riscv32 -mattr=+experimental-xqcilo -show-encoding \
-# RUN:     | FileCheck -check-prefixes=CHECK-ENC,CHECK-INST %s
+# RUN:     | FileCheck -check-prefixes=CHECK-ENC,CHECK-INST,CHECK-ALIAS %s
 # RUN: llvm-mc -filetype=obj -triple riscv32 -mattr=+experimental-xqcilo < %s \
 # RUN:     | llvm-objdump --mattr=+experimental-xqcilo --no-print-imm-hex -d - \
 # RUN:     | FileCheck -check-prefix=CHECK-INST %s
 
-# CHECK-INST: qc.e.lb a1, 0(a0)
-# CHECK-ENC: encoding: [0x9f,0x55,0x05,0x00,0x00,0x00]
+# CHECK-INST: lb a1, 0(a0)
+# CHECK-ENC: encoding: [0x83,0x05,0x05,0x00]
 qc.e.lb x11, (x10)
 
 
-# CHECK-INST: qc.e.lbu        a1, 0(a0)
-# CHECK-ENC: encoding: [0x9f,0x55,0x05,0x40,0x00,0x00]
+# CHECK-INST: lbu a1, 0(a0)
+# CHECK-ENC: encoding: [0x83,0x45,0x05,0x00]
 qc.e.lbu x11, (x10)
 
 
-# CHECK-INST: qc.e.lh a1, 0(a0)
-# CHECK-ENC: encoding: [0x9f,0x55,0x05,0x80,0x00,0x00]
+# CHECK-INST: lh a1, 0(a0)
+# CHECK-ENC: encoding: [0x83,0x15,0x05,0x00]
 qc.e.lh x11, (x10)
 
 
-# CHECK-INST: qc.e.lhu        a1, 0(a0)
-# CHECK-ENC: encoding: [0x9f,0x55,0x05,0xc0,0x00,0x00]
+# CHECK-INST: lhu a1, 0(a0)
+# CHECK-ENC: encoding: [0x83,0x55,0x05,0x00]
 qc.e.lhu x11, (x10)
 
 
-# CHECK-INST: qc.e.lw a1, 0(a0)
-# CHECK-ENC: encoding: [0x9f,0x65,0x05,0x00,0x00,0x00]
+# CHECK-NOALIAS: c.lw a1, 0(a0)
+# CHECK-ALIAS: lw a1, 0(a0)
+# CHECK-ENC: encoding: [0x0c,0x41]
 qc.e.lw x11, (x10)
 
 
-# CHECK-INST: qc.e.sb a1, 0(a0)
-# CHECK-ENC: encoding: [0x1f,0x60,0xb5,0x40,0x00,0x00]
+# CHECK-INST: sb a1, 0(a0)
+# CHECK-ENC: encoding: [0x23,0x00,0xb5,0x00]
 qc.e.sb x11, (x10)
 
 
-# CHECK-INST: qc.e.sh a1, 0(a0)
-# CHECK-ENC: encoding: [0x1f,0x60,0xb5,0x80,0x00,0x00]
+# CHECK-INST: sh a1, 0(a0)
+# CHECK-ENC: encoding: [0x23,0x10,0xb5,0x00]
 qc.e.sh x11, (x10)
 
 
-# CHECK-INST: qc.e.sw a1, 0(a0)
-# CHECK-ENC: encoding: [0x1f,0x60,0xb5,0xc0,0x00,0x00]
+# CHECK-NOALIAS: c.sw a1, 0(a0)
+# CHECK-ALIAS: sw a1, 0(a0)
+# CHECK-ENC: encoding: [0x0c,0xc1]
 qc.e.sw x11, (x10)
diff --git a/llvm/test/MC/RISCV/xqcilo-valid.s b/llvm/test/MC/RISCV/xqcilo-valid.s
index f2ced4698c88a..b1dd7f2910148 100644
--- a/llvm/test/MC/RISCV/xqcilo-valid.s
+++ b/llvm/test/MC/RISCV/xqcilo-valid.s
@@ -1,18 +1,18 @@
 # Xqcilo - Qualcomm uC Large Offset Load Store extension
 # RUN: llvm-mc %s -triple=riscv32 -mattr=+experimental-xqcilo -M no-aliases -show-encoding \
-# RUN:     | FileCheck -check-prefixes=CHECK-ENC,CHECK-INST %s
+# RUN:     | FileCheck -check-prefixes=CHECK-ENC,CHECK-INST,CHECK-NOALIAS %s
 # RUN: llvm-mc -filetype=obj -triple riscv32 -mattr=+experimental-xqcilo < %s \
 # RUN:     | llvm-objdump --mattr=+experimental-xqcilo -M no-aliases --no-print-imm-hex -d - \
 # RUN:     | FileCheck -check-prefix=CHECK-INST %s
 # RUN: llvm-mc %s -triple=riscv32 -mattr=+experimental-xqcilo -show-encoding \
-# RUN:     | FileCheck -check-prefixes=CHECK-ENC,CHECK-INST %s
+# RUN:     | FileCheck -check-prefixes=CHECK-ENC,CHECK-INST,CHECK-ALIAS %s
 # RUN: llvm-mc -filetype=obj -triple riscv32 -mattr=+experimental-xqcilo < %s \
 # RUN:     | llvm-objdump --mattr=+experimental-xqcilo --no-print-imm-hex -d - \
 # RUN:     | FileCheck -check-prefix=CHECK-INST %s
 
-# CHECK-INST: qc.e.lb a1, 12(a0)
-# CHECK-ENC: encoding: [0x9f,0x55,0xc5,0x00,0x00,0x00]
-qc.e.lb x11, 12(x10)
+# CHECK-INST: qc.e.lb a1, 3000(a0)
+# CHECK-ENC: encoding: [0x9f,0x55,0x85,0x3b,0x02,0x00]
+qc.e.lb x11, 3000(x10)
 
 # CHECK-INST: qc.e.lb a1, -33554432(a0)
 # CHECK-ENC: encoding: [0x9f,0x55,0x05,0x00,0x00,0x80]
@@ -23,9 +23,9 @@ qc.e.lb x11, -33554432(x10)
 qc.e.lb x11, 33554431(x10)
 
 
-# CHECK-INST: qc.e.lbu        a1, 12(a0)
-# CHECK-ENC: encoding: [0x9f,0x55,0xc5,0x40,0x00,0x00]
-qc.e.lbu x11, 12(x10)
+# CHECK-INST: qc.e.lbu        a1, 3000(a0)
+# CHECK-ENC: encoding: [0x9f,0x55,0x85,0x7b,0x02,0x00]
+qc.e.lbu x11, 3000(x10)
 
 # CHECK-INST: qc.e.lbu        a1, -33554432(a0)
 # CHECK-ENC: encoding: [0x9f,0x55,0x05,0x40,0x00,0x80]
@@ -36,9 +36,9 @@ qc.e.lbu x11, -33554432(x10)
 qc.e.lbu x11, 33554431(x10)
 
 
-# CHECK-INST: qc.e.lh a1, 12(a0)
-# CHECK-ENC: encoding: [0x9f,0x55,0xc5,0x80,0x00,0x00]
-qc.e.lh x11, 12(x10)
+# CHECK-INST: qc.e.lh a1, 3000(a0)
+# CHECK-ENC: encoding: [0x9f,0x55,0x85,0xbb,0x02,0x00]
+qc.e.lh x11, 3000(x10)
 
 # CHECK-INST: qc.e.lh a1, -33554432(a0)
 # CHECK-ENC: encoding: [0x9f,0x55,0x05,0x80,0x00,0x80]
@@ -49,9 +49,9 @@ qc.e.lh x11, -33554432(x10)
 qc.e.lh x11, 33554431(x10)
 
 
-# CHECK-INST: qc.e.lhu        a1, 12(a0)
-# CHECK-ENC: encoding: [0x9f,0x55,0xc5,0xc0,0x00,0x00]
-qc.e.lhu x11, 12(x10)
+# CHECK-INST: qc.e.lhu        a1, 3000(a0)
+# CHECK-ENC: encoding: [0x9f,0x55,0x85,0xfb,0x02,0x00]
+qc.e.lhu x11, 3000(x10)
 
 # CHECK-INST: qc.e.lhu        a1, -33554432(a0)
 # CHECK-ENC: encoding: [0x9f,0x55,0x05,0xc0,0x00,0x80]
@@ -62,9 +62,9 @@ qc.e.lhu x11, -33554432(x10)
 qc.e.lhu x11, 33554431(x10)
 
 
-# CHECK-INST: qc.e.lw a1, 12(a0)
-# CHECK-ENC: encoding: [0x9f,0x65,0xc5,0x00,0x00,0x00]
-qc.e.lw x11, 12(x10)
+# CHECK-INST: qc.e.lw a1, 3000(a0)
+# CHECK-ENC: encoding: [0x9f,0x65,0x85,0x3b,0x02,0x00]
+qc.e.lw x11, 3000(x10)
 
 # CHECK-INST: qc.e.lw a1, -33554432(a0)
 # CHECK-ENC: encoding: [0x9f,0x65,0x05,0x00,0x00,0x80]
@@ -75,9 +75,9 @@ qc.e.lw x11, -33554432(x10)
 qc.e.lw x11, 33554431(x10)
 
 
-# CHECK-INST: qc.e.sb a1, 12(a0)
-# CHECK-ENC: encoding: [0x1f,0x66,0xb5,0x40,0x00,0x00]
-qc.e.sb x11, 12(x10)
+# CHECK-INST: qc.e.sb a1, 3000(a0)
+# CHECK-ENC: encoding: [0x1f,0x6c,0xb5,0x7a,0x02,0x00]
+qc.e.sb x11, 3000(x10)
 
 # CHECK-INST: qc.e.sb a1, -33554432(a0)
 # CHECK-ENC: encoding: [0x1f,0x60,0xb5,0x40,0x00,0x80]
@@ -88,9 +88,9 @@ qc.e.sb x11, -33554432(x10)
 qc.e.sb x11, 33554431(x10)
 
 
-# CHECK-INST: qc.e.sh a1, 12(a0)
-# CHECK-ENC: encoding: [0x1f,0x66,0xb5,0x80,0x00,0x00]
-qc.e.sh x11, 12(x10)
+# CHECK-INST: qc.e.sh a1, 3000(a0)
+# CHECK-ENC: encoding: [0x1f,0x6c,0xb5,0xba,0x02,0x00]
+qc.e.sh x11, 3000(x10)
 
 # CHECK-INST: qc.e.sh a1, -33554432(a0)
 # CHECK-ENC: encoding: [0x1f,0x60,0xb5,0x80,0x00,0x80]
@@ -101,9 +101,9 @@ qc.e.sh x11, -33554432(x10)
 qc.e.sh x11, 33554431(x10)
 
 
-# CHECK-INST: qc.e.sw a1, 12(a0)
-# CHECK-ENC: encoding: [0x1f,0x66,0xb5,0xc0,0x00,0x00]
-qc.e.sw x11, 12(x10)
+# CHECK-INST: qc.e.sw a1, 3000(a0)
+# CHECK-ENC: encoding: [0x1f,0x6c,0xb5,0xfa,0x02,0x00]
+qc.e.sw x11, 3000(x10)
 
 # CHECK-INST: qc.e.sw a1, -33554432(a0)
 # CHECK-ENC: encoding: [0x1f,0x60,0xb5,0xc0,0x00,0x80]
@@ -112,3 +112,57 @@ qc.e.sw x11, -33554432(x10)
 # CHECK-INST: qc.e.sw a1, 33554431(a0)
 # CHECK-ENC: encoding: [0x9f,0x6f,0xb5,0xfe,0xff,0x7f]
 qc.e.sw x11, 33554431(x10)
+
+# Check that compressed patterns work
+
+# CHECK-INST: lb a1, 100(a0)
+# CHECK-ENC: encoding: [0x83,0x05,0x45,0x06]
+qc.e.lb x11, 100(x10)
+
+# CHECK-INST: lbu a1, 200(a0)
+# CHECK-ENC: encoding: [0x83,0x45,0x85,0x0c]
+qc.e.lbu x11, 200(x10)
+
+# CHECK-INST: lh a1, 300(a0)
+# CHECK-ENC: encoding: [0x83,0x15,0xc5,0x12]
+qc.e.lh x11, 300(x10)
+
+# CHECK-INST: lhu a1, 400(a0)
+# CHECK-ENC: encoding: [0x83,0x55,0x05,0x19]
+qc.e.lhu x11, 400(x10)
+
+# CHECK-INST: lw a1, 500(a0)
+# CHECK-ENC: encoding: [0x83,0x25,0x45,0x1f]
+qc.e.lw x11, 500(x10)
+
+# CHECK-INST: sb a1, 600(a0)
+# CHECK-ENC: encoding: [0x23,0x0c,0xb5,0x24]
+qc.e.sb x11, 600(x10)
+
+# CHECK-INST: sh a1, 700(a0)
+# CHECK-ENC: encoding: [0x23,0x1e,0xb5,0x2a]
+qc.e.sh x11, 700(x10)
+
+# CHECK-INST: sw a1, 800(a0)
+# CHECK-ENC: encoding: [0x23,0x20,0xb5,0x32]
+qc.e.sw x11, 800(x10)
+
+# CHECK-ALIAS: lw a1, 32(a0)
+# CHECK-NOALIAS: c.lw a1, 32(a0)
+# CHECK-ENC: encoding: [0x0c,0x51]
+qc.e.lw x11, 32(x10)
+
+# CHECK-ALIAS: sw a1, 124(a0)
+# CHECK-NOALIAS: c.sw a1, 124(a0)
+# CHECK-ENC: encoding: [0x6c,0xdd]
+qc.e.sw x11, 124(x10)
+
+# CHECK-ALIAS: lw ra, 64(sp)
+# CHECK-NOALIAS: c.lwsp ra, 64(sp)
+# CHECK-ENC: encoding: [0x86,0x40]
+qc.e.lw x1, 64(x2)
+
+# CHECK-ALIAS: sw a1, 252(sp)
+# CHECK-NOALIAS: c.swsp a1, 252(sp)
+# CHECK-ENC: encoding: [0xae,0xdf]
+qc.e.sw x11, 252(x2)