[PowerPC] add testcase for a xxinsertw bug, NFC

Author: Chen Zheng

llvm/test/CodeGen/PowerPC/xxinsertw.ll

@@ -0,0 +1,36 @@
+; NOTE: Assertions have been autogenerated by utils/update_mir_test_checks.py UTC_ARGS: --version 4
+; RUN: llc -mcpu=pwr9 -mtriple=powerpc64-ibm-aix -ppc-asm-full-reg-names -ppc-vsr-nums-as-vr \
+; RUN:     -stop-after=finalize-isel -verify-machineinstrs < %s | \
+; RUN:   FileCheck %s
+
+define <4 x i1> @foo(i1 %c1, i1 %c2, i1 %c3) {
+  ; CHECK-LABEL: name: foo
+  ; CHECK: bb.0 (%ir-block.0):
+  ; CHECK-NEXT:   liveins: $x3, $x4, $x5
+  ; CHECK-NEXT: {{  $}}
+  ; CHECK-NEXT:   [[COPY:%[0-9]+]]:g8rc = COPY $x5
+  ; CHECK-NEXT:   [[COPY1:%[0-9]+]]:g8rc = COPY $x4
+  ; CHECK-NEXT:   [[COPY2:%[0-9]+]]:g8rc = COPY $x3
+  ; CHECK-NEXT:   [[COPY3:%[0-9]+]]:gprc = COPY [[COPY1]].sub_32
+  ; CHECK-NEXT:   [[MTVSRWZ:%[0-9]+]]:vsfrc = MTVSRWZ killed [[COPY3]]
+  ; CHECK-NEXT:   [[SUBREG_TO_REG:%[0-9]+]]:vrrc = SUBREG_TO_REG 1, killed [[MTVSRWZ]], %subreg.sub_64
+  ; CHECK-NEXT:   [[COPY4:%[0-9]+]]:gprc = COPY [[COPY2]].sub_32
+  ; CHECK-NEXT:   [[MTVSRWZ1:%[0-9]+]]:vsfrc = MTVSRWZ killed [[COPY4]]
+  ; CHECK-NEXT:   [[SUBREG_TO_REG1:%[0-9]+]]:vrrc = SUBREG_TO_REG 1, killed [[MTVSRWZ1]], %subreg.sub_64
+  ; CHECK-NEXT:   [[VMRGOW:%[0-9]+]]:vrrc = VMRGOW killed [[SUBREG_TO_REG1]], killed [[SUBREG_TO_REG]]
+  ; CHECK-NEXT:   [[LDtocCPT:%[0-9]+]]:g8rc_and_g8rc_nox0 = LDtocCPT %const.0, $x2 :: (load (s64) from got)
+  ; CHECK-NEXT:   [[LXV:%[0-9]+]]:vsrc = LXV 0, killed [[LDtocCPT]] :: (load (s128) from constant-pool)
+  ; CHECK-NEXT:   [[COPY5:%[0-9]+]]:gprc = COPY [[COPY]].sub_32
+  ; CHECK-NEXT:   [[MTVSRWZ2:%[0-9]+]]:vsfrc = MTVSRWZ killed [[COPY5]]
+  ; CHECK-NEXT:   [[SUBREG_TO_REG2:%[0-9]+]]:vsrc = SUBREG_TO_REG 1, killed [[MTVSRWZ2]], %subreg.sub_64
+  ; CHECK-NEXT:   [[XXPERM:%[0-9]+]]:vsrc = XXPERM killed [[VMRGOW]], [[SUBREG_TO_REG2]], killed [[LXV]]
+  ; CHECK-NEXT:   [[DEF:%[0-9]+]]:vsrc = IMPLICIT_DEF
+  ; CHECK-NEXT:   [[XXINSERTW:%[0-9]+]]:vsrc = XXINSERTW [[DEF]], killed [[XXPERM]], 8
+  ; CHECK-NEXT:   $v2 = COPY [[XXINSERTW]]
+  ; CHECK-NEXT:   BLR8 implicit $lr8, implicit $rm, implicit $v2
+  %1 = insertelement <4 x i1> poison, i1 %c1, i64 0
+  %2 = insertelement <4 x i1> %1, i1 %c2, i64 1
+  %3 = insertelement <4 x i1> %2, i1 %c3, i64 3
+  %4 = shufflevector <4 x i1> %3, <4 x i1> poison, <4 x i32> <i32 0, i32 1, i32 1, i32 3>
+  ret <4 x i1> %4
+}