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49 lines
1.5 KiB
49 lines
1.5 KiB
# NOTE: Assertions have been autogenerated by utils/update_mir_test_checks.py
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# RUN: llc -march=amdgcn -mcpu=gfx803 -run-pass simple-register-coalescing -verify-machineinstrs -o - %s | FileCheck %s
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#
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# This is another example of a test giving "Couldn't join subrange!"
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#
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# This shows a case where a whole reg use point of the whole register was
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# undefined in one subreg, but after coalescing it became defined but the
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# subrange was not updated to reflect that.
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#
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---
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name: coalescing_makes_lane_defined
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tracksRegLiveness: true
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body: |
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; CHECK-LABEL: name: coalescing_makes_lane_defined
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; CHECK: bb.0:
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; CHECK: successors: %bb.1(0x40000000), %bb.2(0x40000000)
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; CHECK: undef %4.sub2:sgpr_128 = S_MOV_B32 0
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; CHECK: dead undef %7.sub0:sgpr_128 = S_MOV_B32 0
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; CHECK: S_CBRANCH_SCC0 %bb.2, implicit undef $scc
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; CHECK: bb.1:
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; CHECK: successors: %bb.2(0x80000000)
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; CHECK: %4.sub0:sgpr_128 = S_MOV_B32 -1
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; CHECK: bb.2:
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; CHECK: S_NOP 0, implicit %4
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bb.0:
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successors: %bb.1, %bb.2
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%0:sreg_32_xm0 = S_MOV_B32 0
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undef %1.sub2:sgpr_128 = COPY %0
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undef %2.sub0:sgpr_128 = S_MOV_B32 0
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undef %3.sub2:sgpr_128 = COPY %0
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S_CBRANCH_SCC0 %bb.2, implicit undef $scc
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bb.1:
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successors: %bb.2
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undef %4.sub0:sgpr_128 = S_MOV_B32 -1
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%4.sub2:sgpr_128 = COPY killed %0
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%5:sgpr_128 = COPY killed %4
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%6:sgpr_128 = COPY killed %1
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%3:sgpr_128 = COPY killed %6
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%2:sgpr_128 = COPY killed %5
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bb.2:
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S_NOP 0, implicit killed %3
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...
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