[PowerPC] Add tests for select patterns. NFC.

Author: Kai Luo

llvm/test/CodeGen/PowerPC/select.ll

@@ -0,0 +1,66 @@
+; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
+; RUN: llc -ppc-asm-full-reg-names -verify-machineinstrs \
+; RUN:   -mtriple=powerpc64le-linux-gnu < %s | FileCheck \
+; RUN:   -check-prefix=CHECK-LE %s
+
+define i64 @f0(i64 %x) {
+; CHECK-LE-LABEL: f0:
+; CHECK-LE:       # %bb.0:
+; CHECK-LE-NEXT:    li r4, 125
+; CHECK-LE-NEXT:    cmpdi r3, 0
+; CHECK-LE-NEXT:    li r3, -3
+; CHECK-LE-NEXT:    isellt r3, r3, r4
+; CHECK-LE-NEXT:    blr
+  %c = icmp slt i64 %x, 0
+  %r = select i1 %c, i64 -3, i64 125
+  ret i64 %r
+}
+
+define i64 @f1(i64 %x) {
+; CHECK-LE-LABEL: f1:
+; CHECK-LE:       # %bb.0:
+; CHECK-LE-NEXT:    li r4, 512
+; CHECK-LE-NEXT:    cmpdi r3, 0
+; CHECK-LE-NEXT:    li r3, 64
+; CHECK-LE-NEXT:    isellt r3, r3, r4
+; CHECK-LE-NEXT:    blr
+  %c = icmp slt i64 %x, 0
+  %r = select i1 %c, i64 64, i64 512
+  ret i64 %r
+}
+
+define i64 @f2(i64 %x) {
+; CHECK-LE-LABEL: f2:
+; CHECK-LE:       # %bb.0:
+; CHECK-LE-NEXT:    li r4, 1024
+; CHECK-LE-NEXT:    cmpdi r3, 0
+; CHECK-LE-NEXT:    iseleq r3, 0, r4
+; CHECK-LE-NEXT:    blr
+  %c = icmp eq i64 %x, 0
+  %r = select i1 %c, i64 0, i64 1024
+  ret i64 %r
+}
+
+define i64 @f3(i64 %x, i64 %y) {
+; CHECK-LE-LABEL: f3:
+; CHECK-LE:       # %bb.0:
+; CHECK-LE-NEXT:    cmpldi r3, 0
+; CHECK-LE-NEXT:    iseleq r3, 0, r4
+; CHECK-LE-NEXT:    blr
+  %c = icmp eq i64 %x, 0
+  %r = select i1 %c, i64 0, i64 %y
+  ret i64 %r
+}
+
+define i64 @f4(i64 %x) {
+; CHECK-LE-LABEL: f4:
+; CHECK-LE:       # %bb.0:
+; CHECK-LE-NEXT:    neg r4, r3
+; CHECK-LE-NEXT:    cmpdi r3, 0
+; CHECK-LE-NEXT:    iselgt r3, r4, r3
+; CHECK-LE-NEXT:    blr
+  %c = icmp sgt i64 %x, 0
+  %x.neg = sub i64 0, %x
+  %r = select i1 %c, i64 %x.neg, i64 %x
+  ret i64 %r
+}