| ; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py |
| ; RUN: llc < %s -mtriple=thumbv7m-none-eabi -o - | FileCheck %s |
| |
| ; 0xff00ff00 = 4278255360 |
| ; 0x00ff00ff = 16711935 |
| define i32 @rev16(i32 %a) { |
| ; CHECK-LABEL: rev16: |
| ; CHECK: @ %bb.0: |
| ; CHECK-NEXT: rev16 r0, r0 |
| ; CHECK-NEXT: bx lr |
| %l8 = shl i32 %a, 8 |
| %r8 = lshr i32 %a, 8 |
| %mask_l8 = and i32 %l8, 4278255360 |
| %mask_r8 = and i32 %r8, 16711935 |
| %tmp = or i32 %mask_l8, %mask_r8 |
| ret i32 %tmp |
| } |
| |
| define i32 @not_rev16(i32 %a) { |
| ; CHECK-LABEL: not_rev16: |
| ; CHECK: @ %bb.0: |
| ; CHECK-NEXT: mov.w r1, #65280 |
| ; CHECK-NEXT: and.w r1, r1, r0, lsr #8 |
| ; CHECK-NEXT: and r0, r0, #65280 |
| ; CHECK-NEXT: orr.w r0, r1, r0, lsl #8 |
| ; CHECK-NEXT: bx lr |
| %l8 = shl i32 %a, 8 |
| %r8 = lshr i32 %a, 8 |
| %mask_r8 = and i32 %r8, 4278255360 |
| %mask_l8 = and i32 %l8, 16711935 |
| %tmp = or i32 %mask_r8, %mask_l8 |
| ret i32 %tmp |
| } |
| |
| define i32 @extra_maskop_uses2(i32 %a) { |
| ; CHECK-LABEL: extra_maskop_uses2: |
| ; CHECK: @ %bb.0: |
| ; CHECK-NEXT: mov.w r1, #-16711936 |
| ; CHECK-NEXT: mov.w r2, #16711935 |
| ; CHECK-NEXT: and.w r1, r1, r0, lsl #8 |
| ; CHECK-NEXT: and.w r0, r2, r0, lsr #8 |
| ; CHECK-NEXT: adds r2, r0, r1 |
| ; CHECK-NEXT: muls r0, r1, r0 |
| ; CHECK-NEXT: muls r0, r2, r0 |
| ; CHECK-NEXT: bx lr |
| %l8 = shl i32 %a, 8 |
| %r8 = lshr i32 %a, 8 |
| %mask_l8 = and i32 %l8, 4278255360 |
| %mask_r8 = and i32 %r8, 16711935 |
| %or = or i32 %mask_r8, %mask_l8 |
| %mul = mul i32 %mask_r8, %mask_l8 ; another use of the mask ops |
| %r = mul i32 %mul, %or ; and use that result |
| ret i32 %r |
| } |
| |
| |
| define i32 @bswap_ror_commuted(i32 %a) { |
| ; CHECK-LABEL: bswap_ror_commuted: |
| ; CHECK: @ %bb.0: |
| ; CHECK-NEXT: rev16 r0, r0 |
| ; CHECK-NEXT: bx lr |
| %l8 = shl i32 %a, 8 |
| %r8 = lshr i32 %a, 8 |
| %mask_l8 = and i32 %l8, 4278255360 |
| %mask_r8 = and i32 %r8, 16711935 |
| %tmp = or i32 %mask_r8, %mask_l8 |
| ret i32 %tmp |
| } |
| |
| define i32 @different_shift_amount(i32 %a) { |
| ; CHECK-LABEL: different_shift_amount: |
| ; CHECK: @ %bb.0: |
| ; CHECK-NEXT: mov.w r1, #16711935 |
| ; CHECK-NEXT: movw r2, #65024 |
| ; CHECK-NEXT: and.w r1, r1, r0, lsr #8 |
| ; CHECK-NEXT: movt r2, #65280 |
| ; CHECK-NEXT: and.w r0, r2, r0, lsl #9 |
| ; CHECK-NEXT: add r0, r1 |
| ; CHECK-NEXT: bx lr |
| %l8 = shl i32 %a, 9 |
| %r8 = lshr i32 %a, 8 |
| %mask_l8 = and i32 %l8, 4278255360 |
| %mask_r8 = and i32 %r8, 16711935 |
| %tmp = or i32 %mask_l8, %mask_r8 |
| ret i32 %tmp |
| } |
| |
| define i32 @different_constant(i32 %a) { |
| ; CHECK-LABEL: different_constant: |
| ; CHECK: @ %bb.0: |
| ; CHECK-NEXT: mov.w r1, #16711935 |
| ; CHECK-NEXT: and.w r0, r1, r0, lsr #8 |
| ; CHECK-NEXT: bx lr |
| %l8 = shl i32 %a, 8 |
| %r8 = lshr i32 %a, 8 |
| %mask_l8 = and i32 %l8, 42 |
| %mask_r8 = and i32 %r8, 16711935 |
| %tmp = or i32 %mask_l8, %mask_r8 |
| ret i32 %tmp |
| } |
| |
| define i32 @different_op(i32 %a) { |
| ; CHECK-LABEL: different_op: |
| ; CHECK: @ %bb.0: |
| ; CHECK-NEXT: mov.w r1, #16711935 |
| ; CHECK-NEXT: movw r2, #256 |
| ; CHECK-NEXT: and.w r1, r1, r0, lsr #8 |
| ; CHECK-NEXT: movt r2, #255 |
| ; CHECK-NEXT: add.w r0, r2, r0, lsl #8 |
| ; CHECK-NEXT: orrs r0, r1 |
| ; CHECK-NEXT: bx lr |
| %l8 = shl i32 %a, 8 |
| %r8 = lshr i32 %a, 8 |
| %mask_l8 = sub i32 %l8, 4278255360 |
| %mask_r8 = and i32 %r8, 16711935 |
| %tmp = or i32 %mask_l8, %mask_r8 |
| ret i32 %tmp |
| } |
| |
| define i32 @different_vars(i32 %a, i32 %b) { |
| ; CHECK-LABEL: different_vars: |
| ; CHECK: @ %bb.0: |
| ; CHECK-NEXT: mov.w r2, #16711935 |
| ; CHECK-NEXT: and.w r1, r2, r1, lsr #8 |
| ; CHECK-NEXT: mov.w r2, #-16711936 |
| ; CHECK-NEXT: and.w r0, r2, r0, lsl #8 |
| ; CHECK-NEXT: add r0, r1 |
| ; CHECK-NEXT: bx lr |
| %l8 = shl i32 %a, 8 |
| %r8 = lshr i32 %b, 8 |
| %mask_l8 = and i32 %l8, 4278255360 |
| %mask_r8 = and i32 %r8, 16711935 |
| %tmp = or i32 %mask_l8, %mask_r8 |
| ret i32 %tmp |
| } |
| |
| |
| ; FIXME: this rev16 pattern is not matching |
| |
| ; 0xff000000 = 4278190080 |
| ; 0x00ff0000 = 16711680 |
| ; 0x0000ff00 = 65280 |
| ; 0x000000ff = 255 |
| define i32 @f2(i32 %a) { |
| ; CHECK-LABEL: f2: |
| ; CHECK: @ %bb.0: |
| ; CHECK-NEXT: mov.w r1, #16711680 |
| ; CHECK-NEXT: and r2, r0, #16711680 |
| ; CHECK-NEXT: and.w r1, r1, r0, lsr #8 |
| ; CHECK-NEXT: orr.w r1, r1, r2, lsl #8 |
| ; CHECK-NEXT: ubfx r2, r0, #8, #8 |
| ; CHECK-NEXT: bfi r2, r0, #8, #8 |
| ; CHECK-NEXT: adds r0, r2, r1 |
| ; CHECK-NEXT: bx lr |
| %l8 = shl i32 %a, 8 |
| %r8 = lshr i32 %a, 8 |
| %masklo_l8 = and i32 %l8, 65280 |
| %maskhi_l8 = and i32 %l8, 4278190080 |
| %masklo_r8 = and i32 %r8, 255 |
| %maskhi_r8 = and i32 %r8, 16711680 |
| %tmp1 = or i32 %masklo_l8, %masklo_r8 |
| %tmp2 = or i32 %maskhi_l8, %maskhi_r8 |
| %tmp = or i32 %tmp1, %tmp2 |
| ret i32 %tmp |
| } |