[llvm] [Xtensa] Implement lowering SELECT_CC/BRCC for Xtensa FP Option. (PR #145544)

[Andrei Safronov via llvm-commits]

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@@ -1310,6 +1309,33 @@ let AddedComplexity = 10 in
 def : Pat<(f32 (load (Xtensa_pcrel_wrapper tconstpool:$in))),
           (WFR (L32R tconstpool:$in))>;
 
+//===----------------------------------------------------------------------===//
+// SelectCC and BranchCC instructions with FP operands
+//===----------------------------------------------------------------------===//
+
+let usesCustomInserter = 1, Predicates = [HasSingleFloat] in {
+  def SELECT_CC_INT_FP : Pseudo<(outs FPR:$dst), (ins AR:$lhs, AR:$rhs, FPR:$t, FPR:$f, i32imm:$cond),
+                               "!select_cc_int_fp $dst, $lhs, $rhs, $t, $f, $cond",
+                               [(set FPR:$dst, (Xtensa_select_cc AR:$lhs, AR:$rhs, FPR:$t, FPR:$f, imm:$cond))]>;
+  def SELECT_CC_FP_INT : Pseudo<(outs AR:$dst), (ins FPR:$lhs, FPR:$rhs, AR:$t, AR:$f, i32imm:$cond, i32imm:$brkind),
+                               "!select_cc_fp_int $dst, $lhs, $rhs, $t, $f, $cond, $brkind",
+                               [(set AR:$dst, (Xtensa_select_cc_fp FPR:$lhs, FPR:$rhs, AR:$t, AR:$f, imm:$cond, imm:$brkind))]>;
+  def SELECT_CC_FP_FP : Pseudo<(outs FPR:$dst), (ins FPR:$lhs, FPR:$rhs, FPR:$t, FPR:$f, i32imm:$cond, i32imm:$brkind),
+                              "!select_cc_fp_fp $dst, $lhs, $rhs, $t, $f, $cond, $brkind",
+                              [(set FPR:$dst, (Xtensa_select_cc_fp FPR:$lhs, FPR:$rhs, FPR:$t, FPR:$f, imm:$cond, imm:$brkind))]>;
+}
+
+let usesCustomInserter = 1, isBranch = 1, isTerminator = 1, isBarrier = 1, Predicates = [HasSingleFloat] in {
+  def BRCC_FP : Pseudo<(outs), (ins i32imm:$cond, FPR:$lhs, FPR:$rhs, brtarget:$target),
+                      "!brcc_fp $cond, $lhs, $rhs, $target", []>;
+}
+
+def cond_as_i32imm : SDNodeXForm<cond, [{
+  return CurDAG->getTargetConstant(N->get(), SDLoc(N), MVT::i32);
+}]>;
+
+def : Pat<(brcc cond:$cond, FPR:$s, FPR:$t,  bb:$target), (BRCC_FP (cond_as_i32imm $cond), FPR:$s, FPR:$t, bb:$target)>;
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andreisfr wrote:

fixed.

https://github.com/llvm/llvm-project/pull/145544