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| author | Krzysztof Parzyszek <kparzysz@codeaurora.org> | 2017-06-27 21:30:46 +0000 |
|---|---|---|
| committer | Krzysztof Parzyszek <kparzysz@codeaurora.org> | 2017-06-27 21:30:46 +0000 |
| commit | 0b7688e6c0048cfcb9834c00d31b975eea30d849 (patch) | |
| tree | 561d3c61babb66eee0223d616738fa1ec9f42d28 /llvm/test | |
| parent | 01822fa1c12723c24910f3701de467a78ac73824 (diff) | |
| download | bcm5719-llvm-0b7688e6c0048cfcb9834c00d31b975eea30d849.tar.gz bcm5719-llvm-0b7688e6c0048cfcb9834c00d31b975eea30d849.zip | |
Create a PHI value when merging with a known undef live-in
Differential Revision: https://reviews.llvm.org/D34640
llvm-svn: 306466
Diffstat (limited to 'llvm/test')
| -rw-r--r-- | llvm/test/CodeGen/Hexagon/regalloc-liveout-undef.mir | 35 |
1 files changed, 35 insertions, 0 deletions
diff --git a/llvm/test/CodeGen/Hexagon/regalloc-liveout-undef.mir b/llvm/test/CodeGen/Hexagon/regalloc-liveout-undef.mir new file mode 100644 index 00000000000..6a41514b060 --- /dev/null +++ b/llvm/test/CodeGen/Hexagon/regalloc-liveout-undef.mir @@ -0,0 +1,35 @@ +# RUN: llc -march=hexagon -run-pass liveintervals -run-pass machineverifier -run-pass simple-register-coalescing %s -o - | FileCheck %s +# +# If there is no consumer of the live intervals, the live intervals pass +# will be freed immediately after it runs, before the verifier. Add a +# user (register coalescer in this case), so that the verification will +# cover live intervals as well. +# +# Make sure that this compiles successfully. +# CHECK: undef %1.isub_lo = A2_addi %1.isub_lo, 1 + +--- +name: fred +tracksRegLiveness: true + +registers: + - { id: 0, class: intregs } + - { id: 1, class: doubleregs } + - { id: 2, class: predregs } + - { id: 3, class: doubleregs } +body: | + bb.0: + liveins: %d0 + successors: %bb.1 + %0 = IMPLICIT_DEF + %1 = COPY %d0 + + bb.1: + successors: %bb.1 + %2 = C2_cmpgt %0, %1.isub_lo + %3 = COPY %1 + %1 = COPY %3 + undef %1.isub_lo = A2_addi %1.isub_lo, 1 + J2_jump %bb.1, implicit-def %pc +... + |
