eb1a571114
If both operands of a SELRMux use the same register which is killed, and the SELRMux is expanded to a jump sequence, a broken MIR results if the kill flag is not removed. This patch replaces the SELRMux with a COPY in these cases.
22 lines
820 B
YAML
22 lines
820 B
YAML
# RUN: llc -o - %s -mtriple=s390x-linux-gnu -mcpu=z15 -run-pass=systemz-post-rewrite \
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# RUN: 2>&1 | FileCheck %s
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# The SELRMux has two identical sources - replace with a copy instruction.
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# CHECK: name: fun0
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# CHECK: renamable $r1l = AHIMuxK killed renamable $r1l, -1, implicit-def dead $cc
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# CHECK-NEXT: CHIMux renamable $r5h, 9, implicit-def $cc
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# CHECK-NEXT: $r14h = COPY killed renamable $r1l
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---
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name: fun0
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tracksRegLiveness: true
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body: |
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bb.0:
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liveins: $r1l, $r5h
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renamable $r1l = AHIMuxK killed renamable $r1l, -1, implicit-def dead $cc
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CHIMux renamable $r5h, 9, implicit-def $cc
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renamable $r14h = SELRMux killed renamable $r1l, renamable $r1l, 14, 8, implicit $cc
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$r14l = COPY killed renamable $r14h
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$r14d = LGFR $r14l
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Return implicit $r14d
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...
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