diff --git a/llvm/lib/Target/AArch64/AArch64InstrInfo.td b/llvm/lib/Target/AArch64/AArch64InstrInfo.td
--- a/llvm/lib/Target/AArch64/AArch64InstrInfo.td
+++ b/llvm/lib/Target/AArch64/AArch64InstrInfo.td
@@ -2392,6 +2392,11 @@
           (SBFMXri GPR64:$Rn, imm0_63:$imm, 63)>;
 }
 
+let AddedComplexity = 21 in {
+def : Pat<(i64 (sext (i32 (sra (i32 (shl GPR32:$Rn, (i64 imm0_31:$imm))), (i64 imm0_31:$imm))))),
+        (SBFMXri (INSERT_SUBREG (i64 (IMPLICIT_DEF)), GPR32:$Rn, sub_32), 0, (i64 (i32shift_b imm0_31:$imm)))>;
+}
+
 def : InstAlias<"asr $dst, $src, $shift",
                 (SBFMWri GPR32:$dst, GPR32:$src, imm0_31:$shift, 31)>;
 def : InstAlias<"asr $dst, $src, $shift",
diff --git a/llvm/test/CodeGen/AArch64/aarch64-combine-bit-operations.ll b/llvm/test/CodeGen/AArch64/aarch64-combine-bit-operations.ll
new file mode 100644
--- /dev/null
+++ b/llvm/test/CodeGen/AArch64/aarch64-combine-bit-operations.ll
@@ -0,0 +1,15 @@
+; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
+; RUN: llc -mtriple=aarch64-unknown-linux-gnu -o - %s | FileCheck %s
+
+define i64 @sext_ashr_shl(i32 %x) {
+; CHECK-LABEL: sext_ashr_shl:
+; CHECK:       // %bb.0: // %entry
+; CHECK-NEXT:    lsl w8, w0, #23
+; CHECK-NEXT:    sbfx x0, x8, #23, #9
+; CHECK-NEXT:    ret
+entry:
+  %bf.cast3 = shl i32 %x, 23
+  %bf.cast = ashr exact i32 %bf.cast3, 23
+  %conv = sext i32 %bf.cast to i64
+  ret i64 %conv
+}