1# RUN: not --crash llc -mtriple=amdgcn-amd-amdhsa -mcpu=gfx906 -verify-machineinstrs -run-pass=machine-scheduler -verify-misched -o /dev/null %s 2>&1 | FileCheck %s 2 3# CHECK: *** Bad machine code: No live subrange at use *** 4# CHECK-NEXT: - function: at_least_one_value_should_be_defined_by_this_mask 5# CHECK-NEXT: - basic block: %bb.0 6# CHECK-NEXT: - instruction: 48B dead undef %2.sub0:vreg_128 = COPY %0.sub0:vreg_128 7# CHECK-NEXT: - operand 1: %0.sub0:vreg_128 8# CHECK-NEXT: - interval: %0 [16r,48r:0) 0@16r L000000000000000C [16r,32r:0) 0@16r weight:0.000000e+00 9 10# This used to assert with: !SR.empty() && "At least one value should be defined by this mask" 11 12# This MIR is invalid and should be caught by the verifier. %0.sub0 is 13# used, but not defined. There are also lanes in %0 that are not used 14# or defined anywhere. Previously there was an assertion in the 15# LiveInterval computation, which was more confusing. The invalid 16# LiveRange should be produced and the verifier will catch it. 17 18--- 19name: at_least_one_value_should_be_defined_by_this_mask 20tracksRegLiveness: true 21body: | 22 bb.0: 23 24 undef %0.sub1:vreg_128 = V_MOV_B32_e32 0, implicit $exec 25 %1:vreg_128 = COPY %0 26 undef %2.sub0:vreg_128 = COPY %0.sub0 27 28... 29