blob: 23a82c29012d9674ec1dd504cae1b9413f8cfee3 [file] [log] [blame]
; NOTE: Assertions have been autogenerated by utils/
; RUN: opt -O1 -S < %s | FileCheck %s
; This is a very convoluted way to write an icmp ule, which comes about by
; matching against a three-way comparison result.
define i1 @ule(i32 %a, i32 %b) {
; CHECK-LABEL: @ule(
; CHECK-NEXT: start:
; CHECK-NEXT: [[DOTNOT:%.*]] = icmp ule i32 [[A:%.*]], [[B:%.*]]
; CHECK-NEXT: ret i1 [[DOTNOT]]
%cmp1 = icmp eq i32 %a, %b
%cmp2 = icmp ult i32 %a, %b
%cmp3 = icmp ne i32 %a, %b
%zext = zext i1 %cmp3 to i64
%sel1 = select i1 %cmp2, i64 -1, i64 %zext
%sel2 = select i1 %cmp1, i64 0, i64 %sel1
switch i64 %sel2, label %exit [
i64 -1, label %bb
i64 0, label %bb
br label %exit
%res = phi i1 [ true, %bb ], [ false, %start ]
ret i1 %res