You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
51 lines
1.5 KiB
51 lines
1.5 KiB
4 months ago
|
; RUN: llc -o - %s | FileCheck %s
|
||
|
|
target triple = "arm-unknown-unknown"
|
||
|
|
|
||
|
|
; select with and i1/or i1 condition should be implemented as a series of 2
|
||
|
|
; cmovs, not by producing two conditions and using and on them.
|
||
|
|
|
||
|
|
define i32 @select_and(i32 %a0, i32 %a1, i32 %a2, i32 %a3, i32 %a4, i32 %a5) {
|
||
|
|
; CHECK-LABEL: select_and
|
||
|
|
; CHECK-NOT: tst
|
||
|
|
; CHECK-NOT: movne
|
||
|
|
; CHECK: mov{{lo|hs}}
|
||
|
|
; CHECK: mov{{lo|hs}}
|
||
|
|
%cmp0 = icmp ult i32 %a0, %a1
|
||
|
|
%cmp1 = icmp ult i32 %a2, %a3
|
||
|
|
%and = and i1 %cmp0, %cmp1
|
||
|
|
%res = select i1 %and, i32 %a4, i32 %a5
|
||
|
|
ret i32 %res
|
||
|
|
}
|
||
|
|
|
||
|
|
define i32 @select_or(i32 %a0, i32 %a1, i32 %a2, i32 %a3, i32 %a4, i32 %a5) {
|
||
|
|
; select with and i1 condition should be implemented as a series of 2 cmovs, not
|
||
|
|
; by producing two conditions and using and on them.
|
||
|
|
; CHECK-LABEL: select_or
|
||
|
|
; CHECK-NOT: orss
|
||
|
|
; CHECK-NOT: tst
|
||
|
|
; CHECK: mov{{lo|hs}}
|
||
|
|
; CHECK: mov{{lo|hs}}
|
||
|
|
%cmp0 = icmp ult i32 %a0, %a1
|
||
|
|
%cmp1 = icmp ult i32 %a2, %a3
|
||
|
|
%and = or i1 %cmp0, %cmp1
|
||
|
|
%res = select i1 %and, i32 %a4, i32 %a5
|
||
|
|
ret i32 %res
|
||
|
|
}
|
||
|
|
|
||
|
|
; If one of the conditions is materialized as a 0/1 value anyway, then the
|
||
|
|
; sequence of 2 cmovs should not be used.
|
||
|
|
|
||
|
|
@var32 = global i32 0
|
||
|
|
define i32 @select_noopt(i32 %a0, i32 %a1, i32 %a2, i32 %a3, i32 %a4) {
|
||
|
|
; CHECK-LABEL: select_noopt
|
||
|
|
; CHECK: orrs
|
||
|
|
; CHECK: movne
|
||
|
|
%cmp0 = icmp ult i32 %a0, %a1
|
||
|
|
%cmp1 = icmp ult i32 %a1, %a2
|
||
|
|
%or = or i1 %cmp0, %cmp1
|
||
|
|
%zero_one = zext i1 %or to i32
|
||
|
|
store volatile i32 %zero_one, i32* @var32
|
||
|
|
%res = select i1 %or, i32 %a3, i32 %a4
|
||
|
|
ret i32 %res
|
||
|
|
}
|