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Diffstat (limited to 'test/CodeGen/SystemZ')
| -rw-r--r-- | test/CodeGen/SystemZ/lower-copy-undef-src.mir | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/test/CodeGen/SystemZ/lower-copy-undef-src.mir b/test/CodeGen/SystemZ/lower-copy-undef-src.mir new file mode 100644 index 00000000000..322460d79d6 --- /dev/null +++ b/test/CodeGen/SystemZ/lower-copy-undef-src.mir @@ -0,0 +1,14 @@ +# RUN: llc -mtriple=s390x-linux-gnu -mcpu=z13 -run-pass=postrapseudos -o - %s | FileCheck %s +# +# Test that a COPY with an undef source operand gets handled like an identity +# copy rather than lowered into a target instruction with the undef flag +# dropped. +--- +# CHECK-LABEL: name: undef_copy +# CHECK: %r13d = KILL undef %r0d, implicit killed %r12q, implicit-def %r12q +name: undef_copy +tracksRegLiveness: true +body: | + bb.0: + liveins: %r12q + %r13d = COPY undef %r0d, implicit killed %r12q, implicit-def %r12q |