derek.holloway
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38 lines
1.1 KiB
YAML
38 lines
1.1 KiB
YAML
# RUN: llc -mtriple=hexagon -run-pass=register-coalescer -o - %s | FileCheck %s
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# Make sure that the coalescer does not create a full definition with
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# an undef flag on the destination. This used to happen when rematerializing
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# a double register and coalescing a smaller reg into a subreg of it.
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# CHECK-NOT: undef %[0-9]+:doubleregs = A2_tfrpi 1
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---
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name: fred
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tracksRegLiveness: true
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body: |
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bb.0:
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successors: %bb.1(0x80000000); %bb.1(200.00%)
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%18:doubleregs = A2_tfrpi 1
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%23:intregs = IMPLICIT_DEF
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%24:doubleregs = IMPLICIT_DEF
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bb.1:
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successors: %bb.1(0x80000000); %bb.1(200.00%)
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%1:doubleregs = COPY %24:doubleregs
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%0:intregs = COPY %23:intregs
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%13:intregs = COPY %18.isub_lo:doubleregs
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%13:intregs = S2_asl_i_r_or %13:intregs, %0:intregs, 1
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%15:intregs = S2_extractu %0:intregs, 1, 31
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undef %17.isub_lo:doubleregs = COPY %13:intregs
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%17.isub_hi:doubleregs = COPY %15:intregs
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%2:doubleregs = A2_addp %17:doubleregs, %1:doubleregs
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%3:intregs = A2_addi %0:intregs, -1
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%23:intregs = COPY %3:intregs
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%24:doubleregs = COPY %2:doubleregs
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J2_jump %bb.1, implicit-def dead $pc
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...
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