| ; 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 |
| } |