[llvm] [VP][RISCV] Add vp.reduce.fmaximum/fminimum and its RISC-V codegen (PR #91782)

[via llvm-commits]

github-actions[bot] wrote:

<!--LLVM CODE FORMAT COMMENT: {clang-format}-->


:warning: C/C++ code formatter, clang-format found issues in your code. :warning:

<details>
<summary>
You can test this locally with the following command:
</summary>

``````````bash
git-clang-format --diff 514d80b4feea3c788c1b0821959e96f63c8b8f3d 89f89cfa38d0358841273bb54dc7db3e363bc429 -- llvm/lib/CodeGen/ExpandVectorPredication.cpp llvm/lib/CodeGen/SelectionDAG/LegalizeDAG.cpp llvm/lib/CodeGen/SelectionDAG/LegalizeVectorTypes.cpp llvm/lib/CodeGen/SelectionDAG/SelectionDAG.cpp llvm/lib/Target/RISCV/RISCVISelLowering.cpp llvm/unittests/IR/VPIntrinsicTest.cpp
``````````

</details>

<details>
<summary>
View the diff from clang-format here.
</summary>

``````````diff
diff --git a/llvm/lib/Target/RISCV/RISCVISelLowering.cpp b/llvm/lib/Target/RISCV/RISCVISelLowering.cpp
index ead14c6945..e5e2ab8ffc 100644
--- a/llvm/lib/Target/RISCV/RISCVISelLowering.cpp
+++ b/llvm/lib/Target/RISCV/RISCVISelLowering.cpp
@@ -700,21 +700,44 @@ RISCVTargetLowering::RISCVTargetLowering(const TargetMachine &TM,
         ISD::VP_SADDSAT,     ISD::VP_UADDSAT,     ISD::VP_SSUBSAT,
         ISD::VP_USUBSAT,     ISD::VP_CTTZ_ELTS,   ISD::VP_CTTZ_ELTS_ZERO_UNDEF};
 
-    static const unsigned FloatingPointVPOps[] = {
-        ISD::VP_FADD,        ISD::VP_FSUB,        ISD::VP_FMUL,
-        ISD::VP_FDIV,        ISD::VP_FNEG,        ISD::VP_FABS,
-        ISD::VP_FMA,         ISD::VP_REDUCE_FADD, ISD::VP_REDUCE_SEQ_FADD,
-        ISD::VP_REDUCE_FMIN, ISD::VP_REDUCE_FMAX, ISD::VP_MERGE,
-        ISD::VP_SELECT,      ISD::VP_SINT_TO_FP,  ISD::VP_UINT_TO_FP,
-        ISD::VP_SETCC,       ISD::VP_FP_ROUND,    ISD::VP_FP_EXTEND,
-        ISD::VP_SQRT,        ISD::VP_FMINNUM,     ISD::VP_FMAXNUM,
-        ISD::VP_FCEIL,       ISD::VP_FFLOOR,      ISD::VP_FROUND,
-        ISD::VP_FROUNDEVEN,  ISD::VP_FCOPYSIGN,   ISD::VP_FROUNDTOZERO,
-        ISD::VP_FRINT,       ISD::VP_FNEARBYINT,  ISD::VP_IS_FPCLASS,
-        ISD::VP_FMINIMUM,    ISD::VP_FMAXIMUM,    ISD::VP_LRINT,
-        ISD::VP_LLRINT,      ISD::EXPERIMENTAL_VP_REVERSE,
-        ISD::EXPERIMENTAL_VP_SPLICE, ISD::VP_REDUCE_FMINIMUM,
-        ISD::VP_REDUCE_FMAXIMUM};
+    static const unsigned FloatingPointVPOps[] = {ISD::VP_FADD,
+                                                  ISD::VP_FSUB,
+                                                  ISD::VP_FMUL,
+                                                  ISD::VP_FDIV,
+                                                  ISD::VP_FNEG,
+                                                  ISD::VP_FABS,
+                                                  ISD::VP_FMA,
+                                                  ISD::VP_REDUCE_FADD,
+                                                  ISD::VP_REDUCE_SEQ_FADD,
+                                                  ISD::VP_REDUCE_FMIN,
+                                                  ISD::VP_REDUCE_FMAX,
+                                                  ISD::VP_MERGE,
+                                                  ISD::VP_SELECT,
+                                                  ISD::VP_SINT_TO_FP,
+                                                  ISD::VP_UINT_TO_FP,
+                                                  ISD::VP_SETCC,
+                                                  ISD::VP_FP_ROUND,
+                                                  ISD::VP_FP_EXTEND,
+                                                  ISD::VP_SQRT,
+                                                  ISD::VP_FMINNUM,
+                                                  ISD::VP_FMAXNUM,
+                                                  ISD::VP_FCEIL,
+                                                  ISD::VP_FFLOOR,
+                                                  ISD::VP_FROUND,
+                                                  ISD::VP_FROUNDEVEN,
+                                                  ISD::VP_FCOPYSIGN,
+                                                  ISD::VP_FROUNDTOZERO,
+                                                  ISD::VP_FRINT,
+                                                  ISD::VP_FNEARBYINT,
+                                                  ISD::VP_IS_FPCLASS,
+                                                  ISD::VP_FMINIMUM,
+                                                  ISD::VP_FMAXIMUM,
+                                                  ISD::VP_LRINT,
+                                                  ISD::VP_LLRINT,
+                                                  ISD::EXPERIMENTAL_VP_REVERSE,
+                                                  ISD::EXPERIMENTAL_VP_SPLICE,
+                                                  ISD::VP_REDUCE_FMINIMUM,
+                                                  ISD::VP_REDUCE_FMAXIMUM};
 
     static const unsigned IntegerVecReduceOps[] = {
         ISD::VECREDUCE_ADD,  ISD::VECREDUCE_AND,  ISD::VECREDUCE_OR,
@@ -950,16 +973,33 @@ RISCVTargetLowering::RISCVTargetLowering(const TargetMachine &TM,
         ISD::STRICT_FDIV, ISD::STRICT_FSQRT, ISD::STRICT_FMA};
 
     // TODO: support more vp ops.
-    static const unsigned ZvfhminPromoteVPOps[] = {
-        ISD::VP_FADD,        ISD::VP_FSUB,         ISD::VP_FMUL,
-        ISD::VP_FDIV,        ISD::VP_FNEG,         ISD::VP_FABS,
-        ISD::VP_FMA,         ISD::VP_REDUCE_FADD,  ISD::VP_REDUCE_SEQ_FADD,
-        ISD::VP_REDUCE_FMIN, ISD::VP_REDUCE_FMAX,  ISD::VP_SQRT,
-        ISD::VP_FMINNUM,     ISD::VP_FMAXNUM,      ISD::VP_FCEIL,
-        ISD::VP_FFLOOR,      ISD::VP_FROUND,       ISD::VP_FROUNDEVEN,
-        ISD::VP_FCOPYSIGN,   ISD::VP_FROUNDTOZERO, ISD::VP_FRINT,
-        ISD::VP_FNEARBYINT,  ISD::VP_SETCC,        ISD::VP_FMINIMUM,
-        ISD::VP_FMAXIMUM,    ISD::VP_REDUCE_FMINIMUM, ISD::VP_REDUCE_FMAXIMUM};
+    static const unsigned ZvfhminPromoteVPOps[] = {ISD::VP_FADD,
+                                                   ISD::VP_FSUB,
+                                                   ISD::VP_FMUL,
+                                                   ISD::VP_FDIV,
+                                                   ISD::VP_FNEG,
+                                                   ISD::VP_FABS,
+                                                   ISD::VP_FMA,
+                                                   ISD::VP_REDUCE_FADD,
+                                                   ISD::VP_REDUCE_SEQ_FADD,
+                                                   ISD::VP_REDUCE_FMIN,
+                                                   ISD::VP_REDUCE_FMAX,
+                                                   ISD::VP_SQRT,
+                                                   ISD::VP_FMINNUM,
+                                                   ISD::VP_FMAXNUM,
+                                                   ISD::VP_FCEIL,
+                                                   ISD::VP_FFLOOR,
+                                                   ISD::VP_FROUND,
+                                                   ISD::VP_FROUNDEVEN,
+                                                   ISD::VP_FCOPYSIGN,
+                                                   ISD::VP_FROUNDTOZERO,
+                                                   ISD::VP_FRINT,
+                                                   ISD::VP_FNEARBYINT,
+                                                   ISD::VP_SETCC,
+                                                   ISD::VP_FMINIMUM,
+                                                   ISD::VP_FMAXIMUM,
+                                                   ISD::VP_REDUCE_FMINIMUM,
+                                                   ISD::VP_REDUCE_FMAXIMUM};
 
     // Sets common operation actions on RVV floating-point vector types.
     const auto SetCommonVFPActions = [&](MVT VT) {

``````````

</details>


https://github.com/llvm/llvm-project/pull/91782