| # RUN: llc -O0 -mtriple arm-- -mattr=+v6 -run-pass=instruction-select -verify-machineinstrs %s -o - | FileCheck %s --check-prefixes=CHECK,ARM |
| # RUN: llc -O0 -mtriple thumb-- -mattr=+v6t2 -run-pass=instruction-select -verify-machineinstrs %s -o - | FileCheck %s --check-prefixes=CHECK,THUMB |
| --- | |
| define void @test_shifts_to_revsh() { ret void } |
| define void @test_shifts_to_revsh_commutative() { ret void } |
| define void @test_shifts_no_revsh_constants() { ret void } |
| ... |
| --- |
| name: test_shifts_to_revsh |
| # CHECK-LABEL: name: test_shifts_to_revsh |
| legalized: true |
| regBankSelected: true |
| selected: false |
| # CHECK: selected: true |
| registers: |
| - { id: 0, class: gprb } |
| - { id: 1, class: gprb } |
| - { id: 2, class: gprb } |
| - { id: 3, class: gprb } |
| - { id: 4, class: gprb } |
| - { id: 5, class: gprb } |
| - { id: 6, class: gprb } |
| - { id: 7, class: gprb } |
| - { id: 8, class: gprb } |
| - { id: 9, class: gprb } |
| body: | |
| bb.0: |
| liveins: $r0 |
| |
| %0(s32) = COPY $r0 |
| ; ARM: [[VREGX:%[0-9]+]]:gpr = COPY $r0 |
| ; THUMB: [[VREGX:%[0-9]+]]:rgpr = COPY $r0 |
| |
| %1(s32) = G_CONSTANT i32 24 |
| %2(s32) = G_SHL %0(s32), %1(s32) |
| |
| %3(s32) = G_CONSTANT i32 16 |
| %4(s32) = G_ASHR %2(s32), %3(s32) |
| |
| %5(s32) = G_CONSTANT i32 8 |
| %6(s32) = G_LSHR %0(s32), %5(s32) |
| |
| %7(s32) = G_CONSTANT i32 255 |
| %8(s32) = G_AND %6(s32), %7(s32) |
| |
| %9(s32) = G_OR %4(s32), %8(s32) |
| ; ARM: [[VREGR:%[0-9]+]]:gpr = REVSH [[VREGX]] |
| ; THUMB: [[VREGR:%[0-9]+]]:rgpr = t2REVSH [[VREGX]] |
| |
| $r0 = COPY %9(s32) |
| ; CHECK: $r0 = COPY [[VREGR]] |
| |
| BX_RET 14, $noreg, implicit $r0 |
| ; CHECK: BX_RET 14, $noreg, implicit $r0 |
| ... |
| --- |
| name: test_shifts_to_revsh_commutative |
| # CHECK-LABEL: name: test_shifts_to_revsh_commutative |
| legalized: true |
| regBankSelected: true |
| selected: false |
| # CHECK: selected: true |
| registers: |
| - { id: 0, class: gprb } |
| - { id: 1, class: gprb } |
| - { id: 2, class: gprb } |
| - { id: 3, class: gprb } |
| - { id: 4, class: gprb } |
| - { id: 5, class: gprb } |
| - { id: 6, class: gprb } |
| - { id: 7, class: gprb } |
| - { id: 8, class: gprb } |
| - { id: 9, class: gprb } |
| body: | |
| bb.0: |
| liveins: $r0 |
| |
| %0(s32) = COPY $r0 |
| ; ARM: [[VREGX:%[0-9]+]]:gpr = COPY $r0 |
| ; THUMB: [[VREGX:%[0-9]+]]:rgpr = COPY $r0 |
| |
| %1(s32) = G_CONSTANT i32 24 |
| %2(s32) = G_SHL %0(s32), %1(s32) |
| |
| %3(s32) = G_CONSTANT i32 16 |
| %4(s32) = G_ASHR %2(s32), %3(s32) |
| |
| %5(s32) = G_CONSTANT i32 8 |
| %6(s32) = G_LSHR %0(s32), %5(s32) |
| |
| %7(s32) = G_CONSTANT i32 255 |
| %8(s32) = G_AND %6(s32), %7(s32) |
| |
| %9(s32) = G_OR %8(s32), %4(s32) |
| ; ARM: [[VREGR:%[0-9]+]]:gpr = REVSH [[VREGX]] |
| ; THUMB: [[VREGR:%[0-9]+]]:rgpr = t2REVSH [[VREGX]] |
| |
| $r0 = COPY %9(s32) |
| ; CHECK: $r0 = COPY [[VREGR]] |
| |
| BX_RET 14, $noreg, implicit $r0 |
| ; CHECK: BX_RET 14, $noreg, implicit $r0 |
| ... |
| --- |
| name: test_shifts_no_revsh_constants |
| # CHECK-LABEL: name: test_shifts_no_revsh_constants |
| legalized: true |
| regBankSelected: true |
| selected: false |
| # CHECK: selected: true |
| registers: |
| - { id: 0, class: gprb } |
| - { id: 1, class: gprb } |
| - { id: 2, class: gprb } |
| - { id: 3, class: gprb } |
| - { id: 4, class: gprb } |
| - { id: 5, class: gprb } |
| - { id: 6, class: gprb } |
| - { id: 7, class: gprb } |
| - { id: 8, class: gprb } |
| - { id: 9, class: gprb } |
| body: | |
| bb.0: |
| liveins: $r0 |
| |
| %0(s32) = COPY $r0 |
| |
| %1(s32) = G_CONSTANT i32 16 ; REVSH needs 24 here |
| %2(s32) = G_SHL %0(s32), %1(s32) |
| |
| %3(s32) = G_CONSTANT i32 24 ; REVSH needs 16 here |
| %4(s32) = G_ASHR %2(s32), %3(s32) |
| |
| %5(s32) = G_CONSTANT i32 8 |
| %6(s32) = G_LSHR %0(s32), %5(s32) |
| |
| %7(s32) = G_CONSTANT i32 255 |
| %8(s32) = G_AND %6(s32), %7(s32) |
| |
| %9(s32) = G_OR %4(s32), %8(s32) |
| ; We don't really care how this is folded as long as it's not into a REVSH. |
| ; CHECK-NOT: REVSH |
| |
| $r0 = COPY %9(s32) |
| |
| BX_RET 14, $noreg, implicit $r0 |
| ... |