Add the PPC64 popcntd instruction

PPC ISA 2.06 (P7, A2, etc.) has a popcntd instruction. Add this instruction and
tell TTI about it so that popcount-loop recognition will know about it.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@178233 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 41 insertions, 0 deletions

diff --git a/test/CodeGen/PowerPC/popcnt.ll b/test/CodeGen/PowerPC/popcnt.ll
new file mode 100644
index 0000000..363f705
--- /dev/null
+++ b/test/CodeGen/PowerPC/popcnt.ll
@@ -0,0 +1,41 @@
+; RUN: llc -march=ppc64 -mattr=+popcntd < %s | FileCheck %s
+
+define i8 @cnt8(i8 %x) nounwind readnone {
+  %cnt = tail call i8 @llvm.ctpop.i8(i8 %x)
+  ret i8 %cnt
+; CHECK: @cnt8
+; CHECK: rldicl
+; CHECK: popcntd
+; CHECK: blr
+}
+
+define i16 @cnt16(i16 %x) nounwind readnone {
+  %cnt = tail call i16 @llvm.ctpop.i16(i16 %x)
+  ret i16 %cnt
+; CHECK: @cnt16
+; CHECK: rldicl
+; CHECK: popcntd
+; CHECK: blr
+}
+
+define i32 @cnt32(i32 %x) nounwind readnone {
+  %cnt = tail call i32 @llvm.ctpop.i32(i32 %x)
+  ret i32 %cnt
+; CHECK: @cnt32
+; CHECK: rldicl
+; CHECK: popcntd
+; CHECK: blr
+}
+
+define i64 @cnt64(i64 %x) nounwind readnone {
+  %cnt = tail call i64 @llvm.ctpop.i64(i64 %x)
+  ret i64 %cnt
+; CHECK: @cnt64
+; CHECK: popcntd
+; CHECK: blr
+}
+
+declare i8 @llvm.ctpop.i8(i8) nounwind readnone
+declare i16 @llvm.ctpop.i16(i16) nounwind readnone
+declare i32 @llvm.ctpop.i32(i32) nounwind readnone
+declare i64 @llvm.ctpop.i64(i64) nounwind readnone