[Test] Pre-submit tests for #101294

Author: LiqinWeng

llvm/test/CodeGen/RISCV/add_shl_constant.ll

@@ -0,0 +1,62 @@
+; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py UTC_ARGS: --version 5
+; RUN: llc -mtriple=riscv32 -verify-machineinstrs < %s \
+; RUN:   | FileCheck -check-prefix=RV32 %s
+; RUN: llc -mtriple=riscv64 -verify-machineinstrs < %s \
+; RUN:   | FileCheck -check-prefix=RV64 %s
+
+define i32 @add_shl_oneUse(i32 %x, i32 %y) nounwind {
+; RV32-LABEL: add_shl_oneUse:
+; RV32:       # %bb.0:
+; RV32-NEXT:    slli a0, a0, 3
+; RV32-NEXT:    add a0, a0, a1
+; RV32-NEXT:    addi a0, a0, 984
+; RV32-NEXT:    ret
+;
+; RV64-LABEL: add_shl_oneUse:
+; RV64:       # %bb.0:
+; RV64-NEXT:    slli a0, a0, 3
+; RV64-NEXT:    add a0, a0, a1
+; RV64-NEXT:    addiw a0, a0, 984
+; RV64-NEXT:    ret
+  %add.0 = add i32 %x, 123
+  %shl = shl i32 %add.0, 3
+  %add.1 = add i32 %shl, %y
+  ret i32 %add.1
+}
+
+define void @add_shl_addmoreOneUse_in_store(ptr %array1, i32 %a, i32 %b)  {
+; RV32-LABEL: add_shl_addmoreOneUse_in_store:
+; RV32:       # %bb.0: # %entry
+; RV32-NEXT:    addi a3, a1, 5
+; RV32-NEXT:    slli a4, a3, 2
+; RV32-NEXT:    add a4, a0, a4
+; RV32-NEXT:    sw a2, 0(a4)
+; RV32-NEXT:    slli a1, a1, 2
+; RV32-NEXT:    add a0, a0, a1
+; RV32-NEXT:    sw a2, 24(a0)
+; RV32-NEXT:    sw a3, 140(a0)
+; RV32-NEXT:    ret
+;
+; RV64-LABEL: add_shl_addmoreOneUse_in_store:
+; RV64:       # %bb.0: # %entry
+; RV64-NEXT:    addiw a3, a1, 5
+; RV64-NEXT:    slli a4, a3, 2
+; RV64-NEXT:    add a4, a0, a4
+; RV64-NEXT:    sw a2, 0(a4)
+; RV64-NEXT:    sext.w a1, a1
+; RV64-NEXT:    slli a1, a1, 2
+; RV64-NEXT:    add a0, a0, a1
+; RV64-NEXT:    sw a2, 24(a0)
+; RV64-NEXT:    sw a3, 140(a0)
+; RV64-NEXT:    ret
+entry:
+   %add = add nsw i32 %a, 5
+  %arrayidx = getelementptr inbounds i32, ptr %array1, i32 %add
+  store i32 %b, ptr %arrayidx
+  %0 = getelementptr i32, ptr %array1, i32 %a
+  %arrayidx3 = getelementptr i8, ptr %0, i32 24
+  store i32 %b, ptr %arrayidx3
+  %arrayidx5 = getelementptr i8, ptr %0, i32 140
+  store i32 %add, ptr %arrayidx5
+  ret void
+}