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