[PATCH] D113887: [fir] Add fir.global_len conversion placeholder

[Valentin Clement via Phabricator via llvm-commits]

clementval created this revision.
clementval added reviewers: jeanPerier, svedanayagam, sscalpone, kiranchandramohan, jdoerfert, schweitz, pmccormick, rovka, AlexisPerry, PeteSteinfeld, awarzynski.
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As for D113662 <https://reviews.llvm.org/D113662>, this patch just add a place holder for
the fir.global_len operation conversion. This operation
is part of F20xx and is not implemented yet.

This patch is part of the upstreaming effort from fir-dev branch.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D113887

Files:
  flang/include/flang/Optimizer/Dialect/FIROps.td
  flang/lib/Optimizer/CodeGen/CodeGen.cpp
  flang/test/Fir/convert-to-llvm-invalid.fir


Index: flang/test/Fir/convert-to-llvm-invalid.fir
===================================================================
--- flang/test/Fir/convert-to-llvm-invalid.fir
+++ flang/test/Fir/convert-to-llvm-invalid.fir
@@ -50,3 +50,14 @@
 ^bb3:
   return
 }
+
+// -----
+
+// Test `fir.global_len` conversion failure. Not implemented yet.
+
+fir.global @global_derived : !fir.type<minez(f:i32)> {
+  // expected-error at +1{{failed to legalize operation 'fir.global_len'}}
+  fir.global_len f, 1 : i32
+  %0 = fir.undefined !fir.type<minez>
+  fir.has_value %0 : !fir.type<minez>
+}
Index: flang/lib/Optimizer/CodeGen/CodeGen.cpp
===================================================================
--- flang/lib/Optimizer/CodeGen/CodeGen.cpp
+++ flang/lib/Optimizer/CodeGen/CodeGen.cpp
@@ -636,6 +636,19 @@
   }
 };
 
+/// Lower `fir.global_len` operation.
+struct GlobalLenOpConversion : public FIROpConversion<fir::GlobalLenOp> {
+  using FIROpConversion::FIROpConversion;
+
+  mlir::LogicalResult
+  matchAndRewrite(fir::GlobalLenOp globalLen, OpAdaptor adaptor,
+                  mlir::ConversionPatternRewriter &rewriter) const override {
+    return rewriter.notifyMatchFailure(
+        globalLen, "fir.global_len codegen is not implemented yet");
+    return success();
+  }
+};
+
 /// Lower `fir.has_value` operation to `llvm.return` operation.
 struct HasValueOpConversion : public FIROpConversion<fir::HasValueOp> {
   using FIROpConversion::FIROpConversion;
@@ -1452,8 +1465,8 @@
         BoxIsPtrOpConversion, BoxRankOpConversion, CallOpConversion,
         ConvertOpConversion, DispatchOpConversion, DispatchTableOpConversion,
         DTEntryOpConversion, DivcOpConversion, EmboxCharOpConversion,
-        ExtractValueOpConversion, HasValueOpConversion, GlobalOpConversion,
-        InsertOnRangeOpConversion, InsertValueOpConversion,
+        ExtractValueOpConversion, HasValueOpConversion, GlobalLenOpConversion,
+        GlobalOpConversion, InsertOnRangeOpConversion, InsertValueOpConversion,
         IsPresentOpConversion, LoadOpConversion, NegcOpConversion,
         MulcOpConversion, SelectCaseOpConversion, SelectOpConversion,
         SelectRankOpConversion, StoreOpConversion, SubcOpConversion,
Index: flang/include/flang/Optimizer/Dialect/FIROps.td
===================================================================
--- flang/include/flang/Optimizer/Dialect/FIROps.td
+++ flang/include/flang/Optimizer/Dialect/FIROps.td
@@ -2797,8 +2797,8 @@
     ```mlir
       global @g : !fir.type<t(len1:i32)> {
         fir.global_len len1, 10 : i32
-        %1 = fir.undefined : !fir.type<t(len1:i32)>
-        return %1 : !fir.type<t(len1:i32)>
+        %1 = fir.undefined !fir.type<t(len1:i32)>
+        fir.has_value %1 : !fir.type<t(len1:i32)>
       }
     ```
   }];


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