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34 lines
1.1 KiB
34 lines
1.1 KiB
4 months ago
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# RUN: llc -march=hexagon -run-pass postra-machine-sink,postrapseudos,if-converter -verify-machineinstrs -o - %s | FileCheck %s
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# 1. Post-RA machine sinking moves the copy (1) to block %bb.1. The
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# subregisters $r2 and $r3 of $d1 are not removed from the live-ins.
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# 2. Expand post-RA pseudos replaces the COPY with A2_tfrp which is
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# predicable.
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# 3. If-conversion predicates block %bb.1. Since $d1 (made of $r2 and $r3)
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# is in the live-in list to %bb.1, it assumes that $d1 in (1) is live,
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# and adds an implicit use of $d1 to the predicated copy.
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# This results in an invalid machine code, since the implicit use
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# refers to an undefined register.
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# Make sure that post-RA machine sinking removes subregisters from live-ins
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# to block bb.1.
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# CHECK: $d1 = A2_tfrpf $p0, $d0
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# CHECK-NOT: implicit killed $d1
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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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liveins: $d0, $p0
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renamable $d1 = COPY $d0 ;; (1)
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J2_jumpt $p0, %bb.2, implicit-def $pc
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bb.1:
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liveins: $r2, $r3
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$r0 = A2_addi $r2, 1
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bb.2:
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liveins: $r0
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A2_nop
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J2_jumpr $r31, implicit-def $pc
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...
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