139 lines
4.1 KiB
Plaintext
139 lines
4.1 KiB
Plaintext
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# NOTE: Assertions have been autogenerated by utils/update_mir_test_checks.py
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# RUN: llc -mtriple aarch64-unknown-unknown -run-pass=instruction-select -verify-machineinstrs %s -o - | FileCheck %s
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#
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# Check that we can continue matching when we are in a situation where we will
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# emit a TB(N)Z.
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...
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---
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name: fold_zext
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alignment: 4
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legalized: true
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regBankSelected: true
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tracksRegLiveness: true
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body: |
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; CHECK-LABEL: name: fold_zext
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; CHECK: bb.0:
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; CHECK: successors: %bb.0(0x40000000), %bb.1(0x40000000)
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; CHECK: liveins: $x0
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; CHECK: %copy:gpr32 = COPY $w0
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; CHECK: TBNZW %copy, 3, %bb.1
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; CHECK: B %bb.0
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; CHECK: bb.1:
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; CHECK: RET_ReallyLR
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bb.0:
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successors: %bb.0, %bb.1
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liveins: $x0
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%copy:gpr(s32) = COPY $w0
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%bit:gpr(s64) = G_CONSTANT i64 8
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%zero:gpr(s64) = G_CONSTANT i64 0
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%fold_me:gpr(s64) = G_ZEXT %copy(s32)
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%and:gpr(s64) = G_AND %fold_me, %bit
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%cmp:gpr(s32) = G_ICMP intpred(ne), %and(s64), %zero
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%cmp_trunc:gpr(s1) = G_TRUNC %cmp(s32)
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G_BRCOND %cmp_trunc(s1), %bb.1
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G_BR %bb.0
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bb.1:
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RET_ReallyLR
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...
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---
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name: fold_anyext
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alignment: 4
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legalized: true
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regBankSelected: true
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tracksRegLiveness: true
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body: |
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; CHECK-LABEL: name: fold_anyext
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; CHECK: bb.0:
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; CHECK: successors: %bb.0(0x40000000), %bb.1(0x40000000)
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; CHECK: liveins: $x0
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; CHECK: %copy:gpr32 = COPY $w0
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; CHECK: TBNZW %copy, 3, %bb.1
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; CHECK: B %bb.0
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; CHECK: bb.1:
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; CHECK: RET_ReallyLR
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bb.0:
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successors: %bb.0, %bb.1
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liveins: $x0
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%copy:gpr(s32) = COPY $w0
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%bit:gpr(s64) = G_CONSTANT i64 8
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%zero:gpr(s64) = G_CONSTANT i64 0
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%fold_me:gpr(s64) = G_ANYEXT %copy(s32)
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%and:gpr(s64) = G_AND %fold_me, %bit
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%cmp:gpr(s32) = G_ICMP intpred(ne), %and(s64), %zero
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%cmp_trunc:gpr(s1) = G_TRUNC %cmp(s32)
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G_BRCOND %cmp_trunc(s1), %bb.1
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G_BR %bb.0
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bb.1:
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RET_ReallyLR
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...
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---
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name: fold_multiple
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alignment: 4
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legalized: true
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regBankSelected: true
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tracksRegLiveness: true
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body: |
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; CHECK-LABEL: name: fold_multiple
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; CHECK: bb.0:
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; CHECK: successors: %bb.0(0x40000000), %bb.1(0x40000000)
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; CHECK: liveins: $h0
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; CHECK: [[SUBREG_TO_REG:%[0-9]+]]:fpr32 = SUBREG_TO_REG 0, $h0, %subreg.hsub
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; CHECK: %copy:gpr32all = COPY [[SUBREG_TO_REG]]
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; CHECK: [[COPY:%[0-9]+]]:gpr32 = COPY %copy
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; CHECK: TBNZW [[COPY]], 3, %bb.1
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; CHECK: B %bb.0
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; CHECK: bb.1:
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; CHECK: RET_ReallyLR
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bb.0:
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successors: %bb.0, %bb.1
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liveins: $h0
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%copy:gpr(s16) = COPY $h0
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%bit:gpr(s64) = G_CONSTANT i64 8
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%zero:gpr(s64) = G_CONSTANT i64 0
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%ext1:gpr(s32) = G_ZEXT %copy(s16)
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%ext2:gpr(s64) = G_ANYEXT %ext1(s32)
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%and:gpr(s64) = G_AND %ext2, %bit
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%cmp:gpr(s32) = G_ICMP intpred(ne), %and(s64), %zero
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%cmp_trunc:gpr(s1) = G_TRUNC %cmp(s32)
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G_BRCOND %cmp_trunc(s1), %bb.1
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G_BR %bb.0
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bb.1:
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RET_ReallyLR
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...
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---
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name: dont_fold_more_than_one_use
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alignment: 4
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legalized: true
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regBankSelected: true
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tracksRegLiveness: true
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body: |
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; CHECK-LABEL: name: dont_fold_more_than_one_use
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; CHECK: bb.0:
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; CHECK: successors: %bb.0(0x40000000), %bb.1(0x40000000)
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; CHECK: liveins: $x0
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; CHECK: %copy:gpr32 = COPY $w0
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; CHECK: [[SUBREG_TO_REG:%[0-9]+]]:gpr64 = SUBREG_TO_REG 0, %copy, %subreg.sub_32
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; CHECK: %zext:gpr64 = UBFMXri [[SUBREG_TO_REG]], 0, 31
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; CHECK: [[COPY:%[0-9]+]]:gpr32all = COPY %zext.sub_32
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; CHECK: [[COPY1:%[0-9]+]]:gpr32 = COPY [[COPY]]
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; CHECK: TBNZW [[COPY1]], 3, %bb.1
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; CHECK: B %bb.0
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; CHECK: bb.1:
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; CHECK: $x0 = COPY %zext
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; CHECK: RET_ReallyLR implicit $x0
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bb.0:
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successors: %bb.0, %bb.1
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liveins: $x0
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%copy:gpr(s32) = COPY $w0
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%bit:gpr(s64) = G_CONSTANT i64 8
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%zero:gpr(s64) = G_CONSTANT i64 0
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%zext:gpr(s64) = G_ZEXT %copy(s32)
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%and:gpr(s64) = G_AND %zext, %bit
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%cmp:gpr(s32) = G_ICMP intpred(ne), %and(s64), %zero
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%cmp_trunc:gpr(s1) = G_TRUNC %cmp(s32)
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G_BRCOND %cmp_trunc(s1), %bb.1
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G_BR %bb.0
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bb.1:
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$x0 = COPY %zext:gpr(s64)
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RET_ReallyLR implicit $x0
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