| ; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py |
| ; RUN: llc < %s -mtriple=x86_64-unknown -mcpu=corei7 | FileCheck %s |
| |
| declare i64 @llvm.ctpop.i64(i64) nounwind readnone |
| |
| define i32 @test1(i64 %x) nounwind readnone { |
| ; CHECK-LABEL: test1: |
| ; CHECK: # BB#0: |
| ; CHECK-NEXT: leaq -1(%rdi), %rcx |
| ; CHECK-NEXT: xorl %eax, %eax |
| ; CHECK-NEXT: testq %rcx, %rdi |
| ; CHECK-NEXT: setne %al |
| ; CHECK-NEXT: retq |
| %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 |
| } |
| |
| |
| define i32 @test2(i64 %x) nounwind readnone { |
| ; CHECK-LABEL: test2: |
| ; CHECK: # BB#0: |
| ; CHECK-NEXT: leaq -1(%rdi), %rcx |
| ; CHECK-NEXT: xorl %eax, %eax |
| ; CHECK-NEXT: testq %rcx, %rdi |
| ; CHECK-NEXT: sete %al |
| ; CHECK-NEXT: retq |
| %count = tail call i64 @llvm.ctpop.i64(i64 %x) |
| %cmp = icmp ult i64 %count, 2 |
| %conv = zext i1 %cmp to i32 |
| ret i32 %conv |
| } |
| |
| define i32 @test3(i64 %x) nounwind readnone { |
| ; CHECK-LABEL: test3: |
| ; CHECK: # BB#0: |
| ; CHECK-NEXT: popcntq %rdi, %rax |
| ; CHECK-NEXT: andb $63, %al |
| ; CHECK-NEXT: cmpb $2, %al |
| ; CHECK-NEXT: sbbl %eax, %eax |
| ; CHECK-NEXT: andl $1, %eax |
| ; CHECK-NEXT: retq |
| %count = tail call i64 @llvm.ctpop.i64(i64 %x) |
| %cast = trunc i64 %count to i6 ; Too small for 0-64 |
| %cmp = icmp ult i6 %cast, 2 |
| %conv = zext i1 %cmp to i32 |
| ret i32 %conv |
| } |