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llvm-mirror/test/CodeGen/Hexagon/packetize-frame-setup-destroy.mir
Bjorn Pettersson d405dff40d [CodeGen] Set FrameSetup/FrameDestroy on BUNDLE instructions
Summary:
If any of the bundled instructions are marked as FrameSetup
or FrameDestroy, then that property is set on the BUNDLE
instruction as well.

As long as the scheduler/packetizer aren't mixing
prologue/epilogue instructions (i.e. all the bundled
instructions have the same property) then this simply gives
the bundle the correct property (so when using a bundle
iterator in late passes a bundle will be correctly identified
as FrameSetup/FrameDestroy).

When for example bundling a mix of FrameSetup instructions
with non-FrameSetup instructions it could be discussed if
the bundle should have the property or not. The choice here
has been to set these properties on the BUNDLE instruction if
any of the bundled instructions have the property set.

Reviewers: #debug-info, kparzysz

Reviewed By: kparzysz

Subscribers: vsk, thegameg, llvm-commits

Differential Revision: https://reviews.llvm.org/D50637

llvm-svn: 340680
2018-08-25 11:26:17 +00:00

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# RUN: llc -march=hexagon -run-pass hexagon-packetizer %s -o - | FileCheck %s
##############################################################################
# This test case is not really hexagon specific, but we use hexagon to get
# bundling.
#
# The goal is to verify that the BUNDLE instruction is getting the
# frame-setup/frame-destroy attribute if any of the bundled instructions got
# the attribute.
##############################################################################
---
name: setup
tracksRegLiveness: true
body: |
bb.0:
liveins: $r1, $r2
successors: %bb.1
$r3 = frame-setup L2_loadri_io $r1, 0
J4_cmpgtu_f_jumpnv_t killed $r3, killed $r2, %bb.1, implicit-def $pc
bb.1:
...
# CHECK-LABEL: name: setup
# CHECK: frame-setup BUNDLE
##############################################################################
---
name: destroy
tracksRegLiveness: true
body: |
bb.0:
liveins: $r1, $r2
successors: %bb.1
$r3 = frame-destroy L2_loadri_io $r1, 0
J4_cmpgtu_f_jumpnv_t killed $r3, killed $r2, %bb.1, implicit-def $pc
bb.1:
...
# CHECK-LABEL: name: destroy
# CHECK: frame-destroy BUNDLE
##############################################################################
---
name: mixed
tracksRegLiveness: true
body: |
bb.0:
liveins: $r1, $r2
successors: %bb.1
$r3 = frame-setup L2_loadri_io $r1, 0
frame-destroy J4_cmpgtu_f_jumpnv_t killed $r3, killed $r2, %bb.1, implicit-def $pc
bb.1:
...
# CHECK-LABEL: name: mixed
# CHECK: frame-setup frame-destroy BUNDLE