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c4f9702f3a
Summary: AArch64 doesn't support uadd.with.overflow.i16 natively. This change adds a legalization rule to convert the 32bit add result to 16bit. This should fix PR43981. Reviewers: arsenm, qcolombet, paquette, aemerson Reviewed By: paquette Subscribers: wdng, rovka, kristof.beyls, hiraditya, Petar.Avramovic, llvm-commits Tags: #llvm Differential Revision: https://reviews.llvm.org/D71587
37 lines
1.3 KiB
YAML
37 lines
1.3 KiB
YAML
# NOTE: Assertions have been autogenerated by utils/update_mir_test_checks.py
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# RUN: llc %s -run-pass legalizer -march=arm64 -global-isel=1 -verify-machineinstrs -o - | FileCheck %s
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...
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---
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name: legalize-uaddo
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alignment: 4
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tracksRegLiveness: true
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body: |
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bb.1:
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liveins: $x0
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; CHECK-LABEL: name: legalize-uaddo
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; CHECK: liveins: $x0
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; CHECK: [[COPY:%[0-9]+]]:_(s64) = COPY $x0
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; CHECK: [[C:%[0-9]+]]:_(s32) = G_CONSTANT i32 65535
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; CHECK: [[TRUNC:%[0-9]+]]:_(s32) = G_TRUNC [[COPY]](s64)
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; CHECK: [[AND:%[0-9]+]]:_(s32) = G_AND [[TRUNC]], [[C]]
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; CHECK: [[C1:%[0-9]+]]:_(s32) = G_CONSTANT i32 2
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; CHECK: [[ADD:%[0-9]+]]:_(s32) = G_ADD [[AND]], [[C1]]
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; CHECK: [[AND1:%[0-9]+]]:_(s32) = G_AND [[ADD]], [[C]]
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; CHECK: [[ICMP:%[0-9]+]]:_(s32) = G_ICMP intpred(ne), [[ADD]](s32), [[AND1]]
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; CHECK: [[C2:%[0-9]+]]:_(s64) = G_CONSTANT i64 1
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; CHECK: [[ANYEXT:%[0-9]+]]:_(s64) = G_ANYEXT [[ICMP]](s32)
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; CHECK: [[AND2:%[0-9]+]]:_(s64) = G_AND [[ANYEXT]], [[C2]]
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; CHECK: $x0 = COPY [[AND2]](s64)
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; CHECK: RET_ReallyLR implicit $x0
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%0:_(s64) = COPY $x0
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%4:_(s16) = G_CONSTANT i16 2
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%1:_(s16) = G_TRUNC %0(s64)
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%2:_(s16), %3:_(s1) = G_UADDO %1, %4
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%5:_(s64) = G_ZEXT %3(s1)
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$x0 = COPY %5(s64)
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RET_ReallyLR implicit $x0
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...
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