[llvm] DAG: Use sincos vector libcalls through RuntimeLibcalls (PR #166984)

[via llvm-commits]

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@@ -425,6 +425,24 @@ RTLIB::Libcall RTLIB::getCOS(EVT RetVT) {
 }
 
 RTLIB::Libcall RTLIB::getSINCOS(EVT RetVT) {
+  // TODO: Tablegen should generate this function
+  if (RetVT.isVector()) {
+    if (!RetVT.isSimple())
+      return RTLIB::UNKNOWN_LIBCALL;
+    switch (RetVT.getSimpleVT().SimpleTy) {
+    case MVT::v4f32:
+      return RTLIB::SINCOS_V4F32;
+    case MVT::v2f64:
+      return RTLIB::SINCOS_V2F64;
+    case MVT::nxv4f32:
+      return RTLIB::SINCOS_NXV4F32;
+    case MVT::nxv2f64:
+      return RTLIB::SINCOS_NXV2F64;
+    default:
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Andarwinux wrote:

> @Andarwinux please raise an issue if you can find AMDLIBM methods llvm doesn't currently handle

No problems. It looks like AMDLIBM is still handling by TLI for now. I thought it would also switch to RuntimeLibcalls soon.

But veclib does indeed have issues on x86, see #164642.

https://github.com/llvm/llvm-project/pull/166984