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177 lines
5.8 KiB
177 lines
5.8 KiB
4 months ago
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# RUN: llc -O0 -mtriple arm-linux-gnueabi -mattr=+v5t -run-pass=legalizer %s -o - | FileCheck %s -check-prefixes=CHECK,CLZ
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# RUN: llc -O0 -mtriple thumb-linux-gnueabi -mattr=+v6t2 -run-pass=legalizer %s -o - | FileCheck %s -check-prefixes=CHECK,CLZ
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# RUN: llc -O0 -mtriple arm-linux-gnueabi -mattr=-v5t -run-pass=legalizer %s -o - | FileCheck %s -check-prefixes=CHECK,LIBCALLS
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--- |
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define void @test_ctlz_s32() { ret void }
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define void @test_ctlz_zero_undef_s32() { ret void }
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; same as above but with extensions
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define void @test_ctlz_s16() { ret void }
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define void @test_ctlz_zero_undef_s8() { ret void }
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...
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---
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name: test_ctlz_s32
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# CHECK-LABEL: name: test_ctlz_s32
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legalized: false
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# CHECK: legalized: true
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regBankSelected: false
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selected: false
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tracksRegLiveness: true
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registers:
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- { id: 0, class: _ }
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- { id: 1, class: _ }
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body: |
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bb.0:
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liveins: $r0
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; CHECK: [[X:%[0-9]+]]:_(s32) = COPY $r0
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%0(s32) = COPY $r0
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; CLZ: [[R:%[0-9]+]]:_(s32) = G_CTLZ [[X]]
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; LIBCALLS-NOT: G_CTLZ
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; LIBCALLS: ADJCALLSTACKDOWN
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; LIBCALLS: $r0 = COPY [[X]]
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; LIBCALLS: BL &__clzsi2, {{.*}}, implicit $r0, implicit-def $r0
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; LIBCALLS: [[COUNT:%[0-9]+]]:_(s32) = COPY $r0
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; LIBCALLS: ADJCALLSTACKUP
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; LIBCALLS-NOT: G_CTLZ
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; LIBCALLS: [[ZERO:%[0-9]+]]:_(s32) = G_CONSTANT i32 0
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; LIBCALLS: [[CMP:%[0-9]+]]:_(s1) = G_ICMP intpred(eq), [[X]](s32), [[ZERO]]
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; LIBCALLS: [[BITS:%[0-9]+]]:_(s32) = G_CONSTANT i32 32
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; LIBCALLS: [[R:%[0-9]+]]:_(s32) = G_SELECT [[CMP]](s1), [[BITS]], [[COUNT]]
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; LIBCALLS-NOT: G_CTLZ
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%1(s32) = G_CTLZ %0
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; CHECK: $r0 = COPY [[R]]
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$r0 = COPY %1(s32)
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BX_RET 14, $noreg, implicit $r0
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...
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---
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name: test_ctlz_zero_undef_s32
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# CHECK-LABEL: name: test_ctlz_zero_undef_s32
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legalized: false
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# CHECK: legalized: true
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regBankSelected: false
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selected: false
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tracksRegLiveness: true
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registers:
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- { id: 0, class: _ }
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- { id: 1, class: _ }
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body: |
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bb.0:
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liveins: $r0
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; CHECK: [[X:%[0-9]+]]:_(s32) = COPY $r0
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%0(s32) = COPY $r0
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; CLZ: [[R:%[0-9]+]]:_(s32) = G_CTLZ [[X]]
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; LIBCALLS-NOT: G_CTLZ
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; LIBCALLS: ADJCALLSTACKDOWN
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; LIBCALLS: $r0 = COPY [[X]]
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; LIBCALLS: BL &__clzsi2, {{.*}}, implicit $r0, implicit-def $r0
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; LIBCALLS: [[R:%[0-9]+]]:_(s32) = COPY $r0
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; LIBCALLS: ADJCALLSTACKUP
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; LIBCALLS-NOT: G_CTLZ
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%1(s32) = G_CTLZ_ZERO_UNDEF %0
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; CHECK: $r0 = COPY [[R]]
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$r0 = COPY %1(s32)
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BX_RET 14, $noreg, implicit $r0
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...
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---
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name: test_ctlz_s16
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# CHECK-LABEL: name: test_ctlz_s16
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legalized: false
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# CHECK: legalized: true
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regBankSelected: false
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selected: false
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tracksRegLiveness: true
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registers:
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- { id: 0, class: _ }
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- { id: 1, class: _ }
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- { id: 2, class: _ }
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- { id: 3, class: _ }
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body: |
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bb.0:
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liveins: $r0
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; CHECK: [[X:%[0-9]+]]:_(s32) = COPY $r0
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; CHECK: [[BITMASK:%[0-9]+]]:_(s32) = G_CONSTANT i32 65535
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; CHECK: [[XAGAIN:%[0-9]+]]:_(s32) = COPY [[X]]
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; CHECK: [[X32:%[0-9]+]]:_(s32) = G_AND [[XAGAIN]], [[BITMASK]]
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%0(s32) = COPY $r0
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%1(s16) = G_TRUNC %0(s32)
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; Check that the operation is performed for 32 bits
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; CLZ: [[COUNT:%[0-9]+]]:_(s32) = G_CTLZ [[X32]]
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; LIBCALLS-NOT: G_CTLZ
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; LIBCALLS: ADJCALLSTACKDOWN
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; LIBCALLS: $r0 = COPY [[X32]]
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; LIBCALLS: BL &__clzsi2, {{.*}}, implicit $r0, implicit-def $r0
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; LIBCALLS: [[UNDEFCOUNT:%[0-9]+]]:_(s32) = COPY $r0
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; LIBCALLS: ADJCALLSTACKUP
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; LIBCALLS-NOT: G_CTLZ
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; LIBCALLS: [[ZERO:%[0-9]+]]:_(s32) = G_CONSTANT i32 0
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; LIBCALLS: [[CMP:%[0-9]+]]:_(s1) = G_ICMP intpred(eq), {{%[0-9]+}}(s32), [[ZERO]]
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; LIBCALLS: [[BITS:%[0-9]+]]:_(s32) = G_CONSTANT i32 32
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; LIBCALLS: [[COUNT:%[0-9]+]]:_(s32) = G_SELECT [[CMP]](s1), [[BITS]], [[UNDEFCOUNT]]
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; LIBCALLS-NOT: G_CTLZ
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; CHECK: [[BITDIFF:%[0-9]+]]:_(s32) = G_CONSTANT i32 16
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; CHECK: [[R32:%[0-9]+]]:_(s32) = G_SUB [[COUNT]], [[BITDIFF]]
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%2(s16) = G_CTLZ %1
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; CHECK: [[RAGAIN:%[0-9]+]]:_(s32) = COPY [[R32]]
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; CHECK: [[SHIFTEDR:%[0-9]+]]:_(s32) = G_SHL [[RAGAIN]], [[BITDIFF]]
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; CHECK: [[R:%[0-9]+]]:_(s32) = G_ASHR [[SHIFTEDR]], [[BITDIFF]]
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; CHECK: $r0 = COPY [[R]]
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%3(s32) = G_SEXT %2(s16)
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$r0 = COPY %3(s32)
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BX_RET 14, $noreg, implicit $r0
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...
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---
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name: test_ctlz_zero_undef_s8
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# CHECK-LABEL: name: test_ctlz_zero_undef_s8
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legalized: false
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# CHECK: legalized: true
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regBankSelected: false
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selected: false
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tracksRegLiveness: true
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registers:
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- { id: 0, class: _ }
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- { id: 1, class: _ }
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- { id: 2, class: _ }
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- { id: 3, class: _ }
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body: |
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bb.0:
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liveins: $r0
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; CHECK: [[X:%[0-9]+]]:_(s32) = COPY $r0
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; CHECK: [[BITMASK:%[0-9]+]]:_(s32) = G_CONSTANT i32 255
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; CHECK: [[XAGAIN:%[0-9]+]]:_(s32) = COPY [[X]]
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; CHECK: [[X32:%[0-9]+]]:_(s32) = G_AND [[XAGAIN]], [[BITMASK]]
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%0(s32) = COPY $r0
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%1(s8) = G_TRUNC %0(s32)
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; Check that the operation is performed for 32 bits
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; CLZ: [[COUNT:%[0-9]+]]:_(s32) = G_CTLZ
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; CLZ-NOT: G_CTLZ_ZERO_UNDEF
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; LIBCALLS-NOT: G_CTLZ
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; LIBCALLS: ADJCALLSTACKDOWN
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; LIBCALLS: $r0 = COPY [[X32]]
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; LIBCALLS: BL &__clzsi2, {{.*}}, implicit $r0, implicit-def $r0
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; LIBCALLS: [[COUNT:%[0-9]+]]:_(s32) = COPY $r0
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; LIBCALLS: ADJCALLSTACKUP
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; LIBCALLS-NOT: G_CTLZ
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; CHECK: [[BITDIFF:%[0-9]+]]:_(s32) = G_CONSTANT i32 24
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; CHECK: [[R32:%[0-9]+]]:_(s32) = G_SUB [[COUNT]], [[BITDIFF]]
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%2(s8) = G_CTLZ_ZERO_UNDEF %1
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; CHECK: [[RAGAIN:%[0-9]+]]:_(s32) = COPY [[R32]]
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; CHECK: [[SHIFTEDR:%[0-9]+]]:_(s32) = G_SHL [[RAGAIN]], [[BITDIFF]]
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; CHECK: [[R:%[0-9]+]]:_(s32) = G_ASHR [[SHIFTEDR]], [[BITDIFF]]
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; CHECK: $r0 = COPY [[R]]
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%3(s32) = G_SEXT %2(s8)
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$r0 = COPY %3(s32)
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BX_RET 14, $noreg, implicit $r0
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...
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