test/CodeGen/X86/ctpop-combine.ll


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; RUN: llc -march=x86-64 < %s | FileCheck %s

declare i64 @llvm.ctpop.i64(i64) nounwind readnone

define i32 @test1(i64 %x) nounwind readnone {
  %count = tail call i64 @llvm.ctpop.i64(i64 %x)
  %cast = trunc i64 %count to i32
  %cmp = icmp ugt i32 %cast, 1
  %conv = zext i1 %cmp to i32
  ret i32 %conv
; CHECK: test1:
; CHECK: leaq -1(%rdi)
; CHECK-NEXT: testq
; CHECK-NEXT: setne
; CHECK: ret
}


define i32 @test2(i64 %x) nounwind readnone {
  %count = tail call i64 @llvm.ctpop.i64(i64 %x)
  %cast = trunc i64 %count to i32
  %cmp = icmp ult i32 %cast, 2
  %conv = zext i1 %cmp to i32
  ret i32 %conv
; CHECK: test2:
; CHECK: leaq -1(%rdi)
; CHECK-NEXT: testq
; CHECK-NEXT: sete
; CHECK: ret
}