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0a6ba29aad
Patch by Jesper Antonsson. Differential Revision: https://reviews.llvm.org/D37611 llvm-svn: 313268
38 lines
1.1 KiB
YAML
38 lines
1.1 KiB
YAML
# RUN: llc -march=hexagon -run-pass if-converter -o - %s -verify-machineinstrs | FileCheck %s
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# The register r23 is live on the path bb.0->bb.2->bb.3. Make sure we add
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# an implicit use of r23 to the predicated redefinition:
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# CHECK: %r23 = A2_tfrt killed %p0, killed %r1, implicit killed %r23
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# LivePhysRegs::addPristines could accidentally remove a callee-saved
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# register, if it determined that it wasn't pristine. Doing that caused
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# r23 in this testcase to be dropped from the Redefs set, and subsequently
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# the necessary implicit use was not added for it.
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---
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name: foo
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tracksRegLiveness: true
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fixedStack:
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- { id: 0, offset: 0, size: 4, alignment: 4, callee-saved-register: '%r23' }
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body: |
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bb.0:
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successors: %bb.1, %bb.2
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liveins: %r0, %r1, %r23
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%p0 = C2_cmpgti killed %r0, 0
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J2_jumpf killed %p0, %bb.2, implicit-def %pc
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bb.1:
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successors: %bb.3
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liveins: %r1
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%r23 = A2_tfr killed %r1
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J2_jump %bb.3, implicit-def %pc
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bb.2:
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successors: %bb.3
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liveins: %r1, %r23
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%r0 = A2_tfr %r1
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bb.3:
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liveins: %r23
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...
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