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# RUN: llc -mtriple=s390x-linux-gnu -mcpu=z13 -start-before=postrapseudos %s -o - \
# RUN: | FileCheck %s
#
# Check that integer load and test instructions are not emitted for unsigned
# comparisons unless checking for equality. That would be wrong, since the
# operands are implicitly treated as signed values.
# Not legal: Logical comparison used for >= (CCMask is 10).
# CHECK-LABEL: fun0
# CHECK-NOT: lt
---
name: fun0
tracksRegLiveness: true
body: |
bb.0 ():
liveins: %r1d
renamable %r0l = L %r1d, 0, %noreg
CLFIMux killed renamable %r0l, 0, implicit-def %cc
BRC 14, 10, %bb.2, implicit %cc
bb.1 ():
liveins: %r0l
ST killed renamable %r0l, %r15d, 164, %noreg
bb.2 ():
liveins: %r0l
ST killed renamable %r0l, %r15d, 164, %noreg
Return
...
# Legal: Logical comparison used for == (CCMask is 8).
# CHECK-LABEL: fun1
# CHECK: lt
---
name: fun1
tracksRegLiveness: true
body: |
bb.0 ():
liveins: %r1d
renamable %r0l = L %r1d, 0, %noreg
CLFIMux killed renamable %r0l, 0, implicit-def %cc
BRC 14, 8, %bb.2, implicit %cc
bb.1 ():
liveins: %r0l
ST killed renamable %r0l, %r15d, 164, %noreg
bb.2 ():
liveins: %r0l
ST killed renamable %r0l, %r15d, 164, %noreg
Return
...
|
