[clang] [llvm] [ARM] Add neon vector support for floor (PR #142559)

[Eli Friedman via cfe-commits]

================
@@ -843,8 +843,8 @@ static const ARMVectorIntrinsicInfo ARMSIMDIntrinsicMap [] 
= {
   NEONMAP1(vrndaq_v, arm_neon_vrinta, Add1ArgType),
   NEONMAP0(vrndi_v),
   NEONMAP0(vrndiq_v),
-  NEONMAP1(vrndm_v, arm_neon_vrintm, Add1ArgType),
-  NEONMAP1(vrndmq_v, arm_neon_vrintm, Add1ArgType),
+  NEONMAP1(vrndm_v, floor, Add1ArgType),
+  NEONMAP1(vrndmq_v, floor, Add1ArgType),
----------------
efriedma-quic wrote:

For AArch64, we have C++ code that chooses between llvm.floor and 
llvm.experimental.constrained.floor.  Do we want the same for 32-bit?

https://github.com/llvm/llvm-project/pull/142559
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