DXC hitting segfault when trying to compile `dot2add` for Metal

[kmpeng]

StructuredBuffer<half2> A : register(t0);
StructuredBuffer<half2> B : register(t1);
StructuredBuffer<float> Acc : register(t2);

RWStructuredBuffer<float> Out : register(u3);

[numthreads(1,1,1)]
void main() {
  Out[0] = dot2add(A[0], B[0], Acc[0]);
  Out[1] = dot2add(A[1], B[1], Acc[1]);
  Out[2] = dot2add(A[2], B[2], Acc[2]);
  Out[3] = dot2add(A[3], B[3], Acc[3]);
  Out[4] = dot2add(A[4], B[4], Acc[4]);
  Out[5] = dot2add(A[5], B[5], Acc[5]);
  Out[6] = dot2add(A[6], B[6], Acc[6]);
  Out[7] = dot2add(A[7], B[7], Acc[7]);
  Out[8] = dot2add(A[8], B[8], Acc[8]);
  Out[9] = dot2add(A[9], B[9], Acc[9]);
  Out[10] = dot2add(A[10], B[10], Acc[10]);
  Out[11] = dot2add(A[11], B[11], Acc[11]);

  Out[12] = dot2add(half2(1, 2), half2(3, 4), float(0));
  Out[13] = dot2add(half2(-1, 2), half2(3, -4), float(10));
  Out[14] = dot2add(half2(65504, 1), half2(1, 65504), float(0));
  Out[15] = dot2add(half2(1, -65504), half2(-65504, 1), float(-10000000));
}

Error message:

Exit Code: 139

Command Output (stderr):
--
/Users/cbieneman/actions-runner/_work/offload-test-suite/offload-test-suite/llvm-project/build/bin/split-file /Users/cbieneman/actions-runner/_work/offload-test-suite/offload-test-suite/OffloadTest/test/Feature/HLSLLib/dot2add.test /Users/cbieneman/actions-runner/_work/offload-test-suite/offload-test-suite/llvm-project/build/tools/OffloadTest/test/mtl/Feature/HLSLLib/Output/dot2add.test.tmp # RUN: at line 105
+ /Users/cbieneman/actions-runner/_work/offload-test-suite/offload-test-suite/llvm-project/build/bin/split-file /Users/cbieneman/actions-runner/_work/offload-test-suite/offload-test-suite/OffloadTest/test/Feature/HLSLLib/dot2add.test /Users/cbieneman/actions-runner/_work/offload-test-suite/offload-test-suite/llvm-project/build/tools/OffloadTest/test/mtl/Feature/HLSLLib/Output/dot2add.test.tmp
"/Users/cbieneman/actions-runner/_work/offload-test-suite/offload-test-suite/DXC/build/bin/dxc-3.7" -metal -enable-16bit-types -T cs_6_5 -Fo /Users/cbieneman/actions-runner/_work/offload-test-suite/offload-test-suite/llvm-project/build/tools/OffloadTest/test/mtl/Feature/HLSLLib/Output/dot2add.test.tmp.o /Users/cbieneman/actions-runner/_work/offload-test-suite/offload-test-suite/llvm-project/build/tools/OffloadTest/test/mtl/Feature/HLSLLib/Output/dot2add.test.tmp/source.hlsl # RUN: at line 106
+ /Users/cbieneman/actions-runner/_work/offload-test-suite/offload-test-suite/DXC/build/bin/dxc-3.7 -metal -enable-16bit-types -T cs_6_5 -Fo /Users/cbieneman/actions-runner/_work/offload-test-suite/offload-test-suite/llvm-project/build/tools/OffloadTest/test/mtl/Feature/HLSLLib/Output/dot2add.test.tmp.o /Users/cbieneman/actions-runner/_work/offload-test-suite/offload-test-suite/llvm-project/build/tools/OffloadTest/test/mtl/Feature/HLSLLib/Output/dot2add.test.tmp/source.hlsl
/Users/cbieneman/actions-runner/_work/offload-test-suite/offload-test-suite/llvm-project/build/tools/OffloadTest/test/mtl/Feature/HLSLLib/Output/dot2add.test.script: line 3: 40539 Segmentation fault: 11  "/Users/cbieneman/actions-runner/_work/offload-test-suite/offload-test-suite/DXC/build/bin/dxc-3.7" -metal -enable-16bit-types -T cs_6_5 -Fo /Users/cbieneman/actions-runner/_work/offload-test-suite/offload-test-suite/llvm-project/build/tools/OffloadTest/test/mtl/Feature/HLSLLib/Output/dot2add.test.tmp.o /Users/cbieneman/actions-runner/_work/offload-test-suite/offload-test-suite/llvm-project/build/tools/OffloadTest/test/mtl/Feature/HLSLLib/Output/dot2add.test.tmp/source.hlsl