74 lines
2.1 KiB
YAML
74 lines
2.1 KiB
YAML
# RUN: llc -mtriple=s390x-linux-gnu -mcpu=z13 -O3 -start-before=livevars %s -o /dev/null 2>&1
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# Test that coalesing of an empty live range (undef) does not cause failure.
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--- |
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define dso_local void @fun(ptr %src, ptr %dst) #0 {
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%1 = sdiv i64 poison, poison
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%2 = load i32, ptr %src, align 4
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br i1 poison, label %6, label %3
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3: ; preds = %0
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%4 = trunc i64 %1 to i32
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%5 = udiv i32 %4, %2
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br label %6
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6: ; preds = %3, %0
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%7 = phi i32 [ %5, %3 ], [ 1, %0 ]
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store i32 %7, ptr %dst, align 4
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ret void
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}
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...
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---
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name: fun
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alignment: 16
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tracksRegLiveness: true
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registers:
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- { id: 0, class: gr64bit }
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- { id: 1, class: gr32bit }
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- { id: 2, class: grx32bit }
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- { id: 3, class: grx32bit }
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- { id: 4, class: addr64bit }
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- { id: 5, class: addr64bit }
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- { id: 6, class: grx32bit }
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- { id: 7, class: grx32bit }
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- { id: 8, class: grx32bit }
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- { id: 9, class: gr64bit }
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- { id: 10, class: gr64bit }
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- { id: 11, class: gr128bit }
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- { id: 12, class: gr128bit }
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- { id: 13, class: gr128bit }
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- { id: 14, class: gr128bit }
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- { id: 15, class: gr64bit }
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liveins:
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- { reg: '$r2d', virtual-reg: '%4' }
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- { reg: '$r3d', virtual-reg: '%5' }
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frameInfo:
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maxAlignment: 1
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machineFunctionInfo: {}
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body: |
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bb.0 (%ir-block.0):
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liveins: $r2d, $r3d
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%5:addr64bit = COPY $r3d
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%4:addr64bit = COPY $r2d
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%6:grx32bit = LHIMux 1
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%7:grx32bit = LHIMux 0
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CHIMux killed %7, 0, implicit-def $cc
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BRC 14, 6, %bb.2, implicit $cc
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J %bb.1
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bb.1 (%ir-block.3):
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%1:gr32bit = LMux %4, 0, $noreg :: (load (s32) from %ir.src)
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%15:gr64bit = LLILL 0
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%14:gr128bit = INSERT_SUBREG undef %13:gr128bit, %15, %subreg.subreg_h64
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%11:gr128bit = INSERT_SUBREG %14, undef %9:gr64bit, %subreg.subreg_l64
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%12:gr128bit = DLR %11, %1
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%2:grx32bit = COPY %12.subreg_ll32
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bb.2 (%ir-block.6):
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%3:grx32bit = PHI %6, %bb.0, %2, %bb.1
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STMux %3, %5, 0, $noreg :: (store (s32) into %ir.dst)
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Return
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...
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