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from c2421e4a708 [AArch64][SVE] Improve diagnostics for vectors with incorre [...] new 945003c7f91 [x86] add tests for DAG FP undef operands; NFC new b994738de76 [AMDGPU] Change llvm.debugtrap to be a debug breakpoint tha [...] new d51b116aa1f [x86] add run with unsafe global param; NFC

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Summary of changes: docs/AMDGPUUsage.rst | 33 +- lib/Target/AMDGPU/SIISelLowering.cpp | 67 ++-- lib/Target/AMDGPU/SIISelLowering.h | 1 + test/CodeGen/AMDGPU/trap.ll | 36 +- test/CodeGen/X86/fp-undef.ll | 646 +++++++++++++++++++++++++++++++++++ 5 files changed, 729 insertions(+), 54 deletions(-) create mode 100644 test/CodeGen/X86/fp-undef.ll