linux-packaging-mono/external/llvm/test/CodeGen/Hexagon/livephysregs-add-pristines.mir
Xamarin Public Jenkins (auto-signing) 64ac736ec5 Imported Upstream version 6.0.0.172
Former-commit-id: f3cc9b82f3e5bd8f0fd3ebc098f789556b44e9cd
2019-04-12 14:10:50 +00:00

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