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2841088eaf
I'm not entirely sure this is the correct thing to do with the global isel philosophy, but I think this is necessary to handle how differently SGPRs are used normally vs. from a condition. For example, it makes sense to allow a copy from a VGPR to an SGPR, but it makes no sense to allow a copy from VGPRs to SGPRs used as select mask. This avoids regbankselecting strange code with a truncate feeding directly into a condition field. Now a copy is forced from sgpr(s1) to vcc, which is more sensible to handle. Some of these issues could probably avoided with making enough operations resulting in i1 illegal. I think we can't avoid this register bank for legality. For example, an i1 and where one source is from a truncate, and one source is a compare needs some kind of copy inserted to make sure both are in condition registers. llvm-svn: 350611
70 lines
2.1 KiB
YAML
70 lines
2.1 KiB
YAML
# NOTE: Assertions have been autogenerated by utils/update_mir_test_checks.py
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# RUN: llc -march=amdgcn -mcpu=fiji -run-pass=regbankselect %s -verify-machineinstrs -o - -regbankselect-fast | FileCheck %s
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# RUN: llc -march=amdgcn -mcpu=fiji -run-pass=regbankselect %s -verify-machineinstrs -o - -regbankselect-greedy | FileCheck %s
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---
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name: fcmp_ss
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legalized: true
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body: |
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bb.0:
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liveins: $sgpr0, $sgpr1
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; CHECK-LABEL: name: fcmp_ss
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; CHECK: [[COPY:%[0-9]+]]:sgpr(s32) = COPY $sgpr0
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; CHECK: [[COPY1:%[0-9]+]]:sgpr(s32) = COPY $sgpr1
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; CHECK: [[COPY2:%[0-9]+]]:vgpr(s32) = COPY [[COPY1]](s32)
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; CHECK: [[FCMP:%[0-9]+]]:vcc(s1) = G_FCMP floatpred(uge), [[COPY]](s32), [[COPY2]]
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%0:_(s32) = COPY $sgpr0
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%1:_(s32) = COPY $sgpr1
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%2:_(s1) = G_FCMP floatpred(uge), %0(s32), %1
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...
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---
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name: fcmp_sv
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legalized: true
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body: |
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bb.0:
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liveins: $sgpr0, $vgpr0
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; CHECK-LABEL: name: fcmp_sv
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; CHECK: [[COPY:%[0-9]+]]:sgpr(s32) = COPY $sgpr0
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; CHECK: [[COPY1:%[0-9]+]]:vgpr(s32) = COPY $vgpr0
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; CHECK: [[FCMP:%[0-9]+]]:vcc(s1) = G_FCMP floatpred(uge), [[COPY]](s32), [[COPY1]]
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%0:_(s32) = COPY $sgpr0
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%1:_(s32) = COPY $vgpr0
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%2:_(s1) = G_FCMP floatpred(uge), %0, %1
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...
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---
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name: fcmp_vs
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legalized: true
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body: |
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bb.0:
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liveins: $sgpr0, $vgpr0
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; CHECK-LABEL: name: fcmp_vs
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; CHECK: [[COPY:%[0-9]+]]:sgpr(s32) = COPY $sgpr0
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; CHECK: [[COPY1:%[0-9]+]]:vgpr(s32) = COPY $vgpr0
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; CHECK: [[COPY2:%[0-9]+]]:vgpr(s32) = COPY [[COPY]](s32)
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; CHECK: [[FCMP:%[0-9]+]]:vcc(s1) = G_FCMP floatpred(uge), [[COPY1]](s32), [[COPY2]]
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%0:_(s32) = COPY $sgpr0
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%1:_(s32) = COPY $vgpr0
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%2:_(s1) = G_FCMP floatpred(uge), %1, %0
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...
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---
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name: fcmp_vv
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legalized: true
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body: |
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bb.0:
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liveins: $vgpr0, $vgpr1
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; CHECK-LABEL: name: fcmp_vv
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; CHECK: [[COPY:%[0-9]+]]:vgpr(s32) = COPY $vgpr0
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; CHECK: [[COPY1:%[0-9]+]]:vgpr(s32) = COPY $vgpr1
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; CHECK: [[ICMP:%[0-9]+]]:vcc(s1) = G_ICMP floatpred(uge), [[COPY]](s32), [[COPY1]]
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%0:_(s32) = COPY $vgpr0
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%1:_(s32) = COPY $vgpr1
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%2:_(s1) = G_ICMP floatpred(uge), %0, %1
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...
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