llvm-6502/test/CodeGen/X86/ctpop-combine.ll

41 lines
967 B
LLVM

; RUN: llc -march=x86-64 -mcpu=corei7 < %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([[A0:%rdi|%rcx]])
; CHECK-NEXT: testq
; CHECK-NEXT: setne
; CHECK: ret
}
define i32 @test2(i64 %x) nounwind readnone {
%count = tail call i64 @llvm.ctpop.i64(i64 %x)
%cmp = icmp ult i64 %count, 2
%conv = zext i1 %cmp to i32
ret i32 %conv
; CHECK: test2:
; CHECK: leaq -1([[A0]])
; CHECK-NEXT: testq
; CHECK-NEXT: sete
; CHECK: ret
}
define i32 @test3(i64 %x) nounwind readnone {
%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
; CHECK: test3:
; CHECK: cmpb $2
; CHECK: ret
}