Changes

Summary

[RISCV] Cleanup some V intrinsic names used in tests to match the type overloads used. Add some missing double tests on rv32. NFC (details)
[SimplifyCFG] Teach SimplifyBranchOnICmpChain() to preserve DomTree (details)
[SimplifyCFG] Teach switchToSelect() to preserve DomTree (details)
[SimplifyCFG] Teach SwitchToLookupTable() to preserve DomTree (details)
[LoopIdiom] 'left-shift until bittest': don't forget to check that PHI node is in loop header (details)
[libc][NFC] Use ASSERT_FP_EQ to compare nan values in tests. (details)

Commit 253dc16f9eb0701305272dc5a438e1f766b4ad60 by craig.topper [RISCV] Cleanup some V intrinsic names used in tests to match the type overloads used. Add some missing double tests on rv32. NFC The matching for intrinsic names is forgiving about types in the name being absent or wrong. Once the intrinsic is parsed its name will remangled to include the real types. This commit fixes the names to have at least enough correct types so that the name used in the test is a prefix of the canonical name. The big missing part is the type for the VL parameter which changes size between rv32 and rv64. While I was in here I noticed that we were missing some tests for double on rv32 so I fixed that by copying from rv64 and fixing up the VL argument type.
	llvm/test/CodeGen/RISCV/rvv/vfwmul-rv32.ll
	llvm/test/CodeGen/RISCV/rvv/vfredsum-rv32.ll
	llvm/test/CodeGen/RISCV/rvv/vmadc-rv32.ll
	llvm/test/CodeGen/RISCV/rvv/vfmv.v.f-rv32.ll
	llvm/test/CodeGen/RISCV/rvv/vredor-rv32.ll
	llvm/test/CodeGen/RISCV/rvv/vredxor-rv32.ll
	llvm/test/CodeGen/RISCV/rvv/vfredmin-rv64.ll
	llvm/test/CodeGen/RISCV/rvv/vfredsum-rv64.ll
	llvm/test/CodeGen/RISCV/rvv/vredand-rv32.ll
	llvm/test/CodeGen/RISCV/rvv/vmadc.carry.in-rv64.ll
	llvm/test/CodeGen/RISCV/rvv/vmsbc.borrow.in-rv64.ll
	llvm/test/CodeGen/RISCV/rvv/vfwsub.w-rv64.ll
	llvm/test/CodeGen/RISCV/rvv/vfredosum-rv64.ll
	llvm/test/CodeGen/RISCV/rvv/vredminu-rv64.ll
	llvm/test/CodeGen/RISCV/rvv/vmadc-rv64.ll
	llvm/test/CodeGen/RISCV/rvv/vfwsub-rv32.ll
	llvm/test/CodeGen/RISCV/rvv/vmsbc-rv32.ll
	llvm/test/CodeGen/RISCV/rvv/vredor-rv64.ll
	llvm/test/CodeGen/RISCV/rvv/vredand-rv64.ll
	llvm/test/CodeGen/RISCV/rvv/vfwsub.w-rv32.ll
	llvm/test/CodeGen/RISCV/rvv/vmsbc-rv64.ll
	llvm/test/CodeGen/RISCV/rvv/vfwredosum-rv64.ll
	llvm/test/CodeGen/RISCV/rvv/vfwadd-rv64.ll
	llvm/test/CodeGen/RISCV/rvv/vmv.v.x-rv64.ll
	llvm/test/CodeGen/RISCV/rvv/vredmin-rv64.ll
	llvm/test/CodeGen/RISCV/rvv/vmsbc.borrow.in-rv32.ll
	llvm/test/CodeGen/RISCV/rvv/vmadc.carry.in-rv32.ll
	llvm/test/CodeGen/RISCV/rvv/vfwredosum-rv32.ll
	llvm/test/CodeGen/RISCV/rvv/vfwadd-rv32.ll
	llvm/test/CodeGen/RISCV/rvv/vfmv.v.f-rv64.ll
	llvm/test/CodeGen/RISCV/rvv/vredmin-rv32.ll
	llvm/test/CodeGen/RISCV/rvv/vfwsub-rv64.ll
	llvm/test/CodeGen/RISCV/rvv/vredmax-rv32.ll
	llvm/test/CodeGen/RISCV/rvv/vredxor-rv64.ll
	llvm/test/CodeGen/RISCV/rvv/vfwadd.w-rv32.ll
	llvm/test/CodeGen/RISCV/rvv/vfirst-rv32.ll
	llvm/test/CodeGen/RISCV/rvv/vfwmul-rv64.ll
	llvm/test/CodeGen/RISCV/rvv/vredmaxu-rv32.ll
	llvm/test/CodeGen/RISCV/rvv/vredmax-rv64.ll
	llvm/test/CodeGen/RISCV/rvv/vfredmin-rv32.ll
	llvm/test/CodeGen/RISCV/rvv/vfredmax-rv32.ll
	llvm/test/CodeGen/RISCV/rvv/vredmaxu-rv64.ll
	llvm/test/CodeGen/RISCV/rvv/vfredmax-rv64.ll
	llvm/test/CodeGen/RISCV/rvv/vmv.v.x-rv32.ll
	llvm/test/CodeGen/RISCV/rvv/vredsum-rv64.ll
	llvm/test/CodeGen/RISCV/rvv/vfredosum-rv32.ll
	llvm/test/CodeGen/RISCV/rvv/vpopc-rv32.ll
	llvm/test/CodeGen/RISCV/rvv/vredminu-rv32.ll
	llvm/test/CodeGen/RISCV/rvv/vfwredsum-rv64.ll
	llvm/test/CodeGen/RISCV/rvv/vfwadd.w-rv64.ll
	llvm/test/CodeGen/RISCV/rvv/vredsum-rv32.ll
	llvm/test/CodeGen/RISCV/rvv/vfwredsum-rv32.ll
Commit c45f765c0d41ad94b857ee4b7e007d58b41ed650 by lebedev.ri [SimplifyCFG] Teach SimplifyBranchOnICmpChain() to preserve DomTree
	llvm/lib/Transforms/Utils/SimplifyCFG.cpp
	llvm/test/Transforms/SimplifyCFG/switch_msan.ll
Commit a17025aa61b16021ee85ff5deec47a9ed40ae1d4 by lebedev.ri [SimplifyCFG] Teach switchToSelect() to preserve DomTree
	llvm/lib/Transforms/Utils/SimplifyCFG.cpp
	llvm/test/Transforms/SimplifyCFG/switch-to-select-two-case.ll
Commit 7f221c9196de2f042030e2a31f81089889d705bd by lebedev.ri [SimplifyCFG] Teach SwitchToLookupTable() to preserve DomTree
	llvm/test/Transforms/SimplifyCFG/X86/switch-covered-bug.ll
	llvm/test/Transforms/SimplifyCFG/X86/switch-table-bug.ll
	llvm/lib/Transforms/Utils/SimplifyCFG.cpp
	llvm/test/Transforms/SimplifyCFG/X86/CoveredLookupTable.ll
	llvm/test/Transforms/SimplifyCFG/X86/disable-lookup-table.ll
	llvm/test/Transforms/SimplifyCFG/rangereduce.ll
Commit 51879a525649c8151f7e841b66a5cea0e1c8e74e by lebedev.ri [LoopIdiom] 'left-shift until bittest': don't forget to check that PHI node is in loop header Fixes an issue reported by Peter Collingbourne in https://reviews.llvm.org/D91726#2475301
	llvm/lib/Transforms/Scalar/LoopIdiomRecognize.cpp
	llvm/test/Transforms/LoopIdiom/X86/left-shift-until-bittest.ll
Commit cc07d5251144e12cc089748ec66af0423ba57ad1 by sivachandra [libc][NFC] Use ASSERT_FP_EQ to compare nan values in tests. This change "fixes" one of the uses that was missed in 0524da67b448dcce6569fae0f54c10f208c2dc56.
	libc/test/src/math/RemQuoTest.h