[MSP430] add tests for unwanted shift codegen; NFC (PR43542)

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@373607 91177308-0d34-0410-b5e6-96231b3b80d8

test/CodeGen/MSP430/selectcc.ll

@@ -0,0 +1,61 @@
+; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
+; RUN: llc -mtriple=msp430-- < %s | FileCheck %s
+
+define i16 @select_to_shifts_i16(i16 %a, i16 %b) {
+; CHECK-LABEL: select_to_shifts_i16:
+; CHECK:       ; %bb.0:
+; CHECK-NEXT:    mov.b r12, r12
+; CHECK-NEXT:    swpb r12
+; CHECK-NEXT:    add r12, r12
+; CHECK-NEXT:    add r12, r12
+; CHECK-NEXT:    add r12, r12
+; CHECK-NEXT:    add r12, r12
+; CHECK-NEXT:    add r12, r12
+; CHECK-NEXT:    add r12, r12
+; CHECK-NEXT:    swpb r12
+; CHECK-NEXT:    sxt r12
+; CHECK-NEXT:    rra r12
+; CHECK-NEXT:    rra r12
+; CHECK-NEXT:    rra r12
+; CHECK-NEXT:    rra r12
+; CHECK-NEXT:    rra r12
+; CHECK-NEXT:    rra r12
+; CHECK-NEXT:    rra r12
+; CHECK-NEXT:    and r13, r12
+; CHECK-NEXT:    ret
+  %and = and i16 %a, 2
+  %tobool = icmp eq i16 %and, 0
+  %select = select i1 %tobool, i16 0, i16 %b
+  ret i16 %select
+}
+
+define i32 @select_to_shifts_i32(i32 %a, i32 %b) {
+; CHECK-LABEL: select_to_shifts_i32:
+; CHECK:       ; %bb.0:
+; CHECK-NEXT:    mov r12, r13
+; CHECK-NEXT:    mov.b r13, r13
+; CHECK-NEXT:    swpb r13
+; CHECK-NEXT:    add r13, r13
+; CHECK-NEXT:    add r13, r13
+; CHECK-NEXT:    add r13, r13
+; CHECK-NEXT:    add r13, r13
+; CHECK-NEXT:    add r13, r13
+; CHECK-NEXT:    add r13, r13
+; CHECK-NEXT:    swpb r13
+; CHECK-NEXT:    sxt r13
+; CHECK-NEXT:    rra r13
+; CHECK-NEXT:    rra r13
+; CHECK-NEXT:    rra r13
+; CHECK-NEXT:    rra r13
+; CHECK-NEXT:    rra r13
+; CHECK-NEXT:    rra r13
+; CHECK-NEXT:    rra r13
+; CHECK-NEXT:    and r13, r14
+; CHECK-NEXT:    and r15, r13
+; CHECK-NEXT:    mov r14, r12
+; CHECK-NEXT:    ret
+  %and = and i32 %a, 2
+  %tobool = icmp eq i32 %and, 0
+  %select = select i1 %tobool, i32 0, i32 %b
+  ret i32 %select
+}