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; RUN: llc -mtriple=thumbv7m-linux-gnu < %s | FileCheck %s --check-prefix=CHECK --check-prefix=T2
; RUN: llc -mtriple=thumbv6m-linux-gnu < %s | FileCheck %s --check-prefix=CHECK --check-prefix=T1
; CHECK-LABEL: single_bit:
; CHECK: lsls r0, r0, #23
; T2-NEXT: mov
; T2-NEXT: it
; T1-NEXT: bmi
define i32 @single_bit(i32 %p) {
%a = and i32 %p, 256
%b = icmp eq i32 %a, 0
br i1 %b, label %true, label %false
true:
ret i32 1
false:
ret i32 2
}
; CHECK-LABEL: single_bit_multi_use:
; CHECK: lsls r0, r0, #23
; T2-NEXT: mov
; T2-NEXT: it
; T1-NEXT: bmi
define i32 @single_bit_multi_use(i32 %p, ptr %z) {
store i32 %p, ptr %z
%a = and i32 %p, 256
%b = icmp eq i32 %a, 0
br i1 %b, label %true, label %false
true:
ret i32 1
false:
ret i32 2
}
; CHECK-LABEL: multi_bit_lsb_ubfx:
; CHECK: lsls r0, r0, #24
; T2-NEXT: mov
; T2-NEXT: it
; T1-NEXT: beq
define i32 @multi_bit_lsb_ubfx(i32 %p) {
%a = and i32 %p, 255
%b = icmp eq i32 %a, 0
br i1 %b, label %true, label %false
true:
ret i32 1
false:
ret i32 2
}
; CHECK-LABEL: multi_bit_msb:
; CHECK: lsrs r0, r0, #24
; T2-NEXT: mov
; T2-NEXT: it
; T1-NEXT: beq
define i32 @multi_bit_msb(i32 %p) {
%a = and i32 %p, 4278190080 ; 0xff000000
%b = icmp eq i32 %a, 0
br i1 %b, label %true, label %false
true:
ret i32 1
false:
ret i32 2
}
; CHECK-LABEL: multi_bit_nosb:
; T1: lsls r0, r0, #8
; T1-NEXT: lsrs r0, r0, #24
; T2: tst.w
; T2-NEXT: it
; T1-NEXT: beq
define i32 @multi_bit_nosb(i32 %p) {
%a = and i32 %p, 16711680 ; 0x00ff0000
%b = icmp eq i32 %a, 0
br i1 %b, label %true, label %false
true:
ret i32 1
false:
ret i32 2
}
; CHECK-LABEL: i16_cmpz:
; T1: uxth r0, r0
; T1-NEXT: lsrs r0, r0, #9
; T1-NEXT: bne
; T2: uxth r0, r0
; T2-NEXT: movs r2, #0
; T2-NEXT: cmp.w r2, r0, lsr #9
define void @i16_cmpz(i16 %x, ptr %foo) {
entry:
%cmp = icmp ult i16 %x, 512
br i1 %cmp, label %if.then, label %if.end
if.then: ; preds = %entry
tail call void %foo(i32 0) #1
br label %if.end
if.end: ; preds = %if.then, %entry
ret void
}
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