Revert "[flang] implement show_descriptor intrinsic, a non-standard extension (#169137)"

This reverts commit e7748e9.

It broke the Windows build

https://github.com/llvm/llvm-project/actions/runs/19842117405/job/56852610863
https://lab.llvm.org/buildbot/#/builders/166/builds/4535

After #170142 fixed another issue, this was also the remaining reason
for this buildbot to fail:

https://lab.llvm.org/buildbot/#/builders/207/builds/10423

Author: Meinersbur

flang-rt/include/flang-rt/runtime/descriptor.h

@@ -510,9 +510,7 @@ class Descriptor {
 
   RT_API_ATTRS void Check() const;
 
-  // When dumpRawType, dumps stringified CFI_type_*, otherwise
-  // try to canonicalize and print as a Fortran type.
-  void Dump(FILE * = stdout, bool dumpRawType = true) const;
+  void Dump(FILE * = stdout) const;
 
   RT_API_ATTRS inline bool HasAddendum() const {
     return raw_.extra & _CFI_ADDENDUM_FLAG;

flang-rt/lib/runtime/descriptor.cpp

@@ -292,168 +292,14 @@ RT_API_ATTRS void Descriptor::Check() const {
   // TODO
 }
 
-static const char *GetTypeStr(ISO::CFI_type_t type, bool dumpRawType) {
-  if (dumpRawType) {
-#define CASE(x) \
-  case (x): \
-    return #x;
-    switch (type) {
-      CASE(CFI_type_signed_char)
-      CASE(CFI_type_short)
-      CASE(CFI_type_int)
-      CASE(CFI_type_long)
-      CASE(CFI_type_long_long)
-      CASE(CFI_type_size_t)
-      CASE(CFI_type_int8_t)
-      CASE(CFI_type_int16_t)
-      CASE(CFI_type_int32_t)
-      CASE(CFI_type_int64_t)
-      CASE(CFI_type_int128_t)
-      CASE(CFI_type_int_least8_t)
-      CASE(CFI_type_int_least16_t)
-      CASE(CFI_type_int_least32_t)
-      CASE(CFI_type_int_least64_t)
-      CASE(CFI_type_int_least128_t)
-      CASE(CFI_type_int_fast8_t)
-      CASE(CFI_type_int_fast16_t)
-      CASE(CFI_type_int_fast32_t)
-      CASE(CFI_type_int_fast64_t)
-      CASE(CFI_type_int_fast128_t)
-      CASE(CFI_type_intmax_t)
-      CASE(CFI_type_intptr_t)
-      CASE(CFI_type_ptrdiff_t)
-      CASE(CFI_type_half_float)
-      CASE(CFI_type_bfloat)
-      CASE(CFI_type_float)
-      CASE(CFI_type_double)
-      CASE(CFI_type_extended_double)
-      CASE(CFI_type_long_double)
-      CASE(CFI_type_float128)
-      CASE(CFI_type_half_float_Complex)
-      CASE(CFI_type_bfloat_Complex)
-      CASE(CFI_type_float_Complex)
-      CASE(CFI_type_double_Complex)
-      CASE(CFI_type_extended_double_Complex)
-      CASE(CFI_type_long_double_Complex)
-      CASE(CFI_type_float128_Complex)
-      CASE(CFI_type_Bool)
-      CASE(CFI_type_char)
-      CASE(CFI_type_cptr)
-      CASE(CFI_type_struct)
-      CASE(CFI_type_char16_t)
-      CASE(CFI_type_char32_t)
-      CASE(CFI_type_uint8_t)
-      CASE(CFI_type_uint16_t)
-      CASE(CFI_type_uint32_t)
-      CASE(CFI_type_uint64_t)
-      CASE(CFI_type_uint128_t)
-    }
-#undef CASE
-    return nullptr;
-  }
-  TypeCode code{type};
-
-  if (!code.IsValid())
-    return "invalid";
-
-  common::optional<std::pair<TypeCategory, int>> categoryAndKind =
-      code.GetCategoryAndKind();
-  if (!categoryAndKind)
-    return nullptr;
-
-  TypeCategory tcat;
-  int kind;
-  std::tie(tcat, kind) = *categoryAndKind;
-
-#define CASE(cat, k) \
-  case (k): \
-    return #cat "(kind=" #k ")";
-  switch (tcat) {
-  case TypeCategory::Integer:
-    switch (kind) {
-      CASE(INTEGER, 1)
-      CASE(INTEGER, 2)
-      CASE(INTEGER, 4)
-      CASE(INTEGER, 8)
-      CASE(INTEGER, 16)
-    }
-    break;
-  case TypeCategory::Unsigned:
-    switch (kind) {
-      CASE(UNSIGNED, 1)
-      CASE(UNSIGNED, 2)
-      CASE(UNSIGNED, 4)
-      CASE(UNSIGNED, 8)
-      CASE(UNSIGNED, 16)
-    }
-    break;
-  case TypeCategory::Real:
-    switch (kind) {
-      CASE(REAL, 2)
-      CASE(REAL, 3)
-      CASE(REAL, 4)
-      CASE(REAL, 8)
-      CASE(REAL, 10)
-      CASE(REAL, 16)
-    }
-    break;
-  case TypeCategory::Complex:
-    switch (kind) {
-      CASE(COMPLEX, 2)
-      CASE(COMPLEX, 3)
-      CASE(COMPLEX, 4)
-      CASE(COMPLEX, 8)
-      CASE(COMPLEX, 10)
-      CASE(COMPLEX, 16)
-    }
-    break;
-  case TypeCategory::Character:
-    switch (kind) {
-      CASE(CHARACTER, 1)
-      CASE(CHARACTER, 2)
-      CASE(CHARACTER, 4)
-    }
-    break;
-  case TypeCategory::Logical:
-    switch (kind) {
-      CASE(LOGICAL, 1)
-      CASE(LOGICAL, 2)
-      CASE(LOGICAL, 4)
-      CASE(LOGICAL, 8)
-    }
-    break;
-  case TypeCategory::Derived:
-    return "DERIVED";
-  }
-#undef CASE
-  return nullptr;
-}
-
-void Descriptor::Dump(FILE *f, bool dumpRawType) const {
+void Descriptor::Dump(FILE *f) const {
   std::fprintf(f, "Descriptor @ %p:\n", reinterpret_cast<const void *>(this));
   std::fprintf(f, "  base_addr %p\n", raw_.base_addr);
-  std::fprintf(f, "  elem_len  %zd\n", ElementBytes());
+  std::fprintf(f, "  elem_len  %zd\n", static_cast<std::size_t>(raw_.elem_len));
   std::fprintf(f, "  version   %d\n", static_cast<int>(raw_.version));
-  if (rank() > 0) {
-    std::fprintf(f, "  rank      %d\n", rank());
-  } else {
-    std::fprintf(f, "  scalar\n");
-  }
-  int ty = static_cast<int>(raw_.type);
-  if (const char *tyStr = GetTypeStr(raw_.type, dumpRawType)) {
-    std::fprintf(f, "  type      %d \"%s\"\n", ty, tyStr);
-  } else {
-    std::fprintf(f, "  type      %d\n", ty);
-  }
-  int attr = static_cast<int>(raw_.attribute);
-  if (IsPointer()) {
-    std::fprintf(f, "  attribute %d (pointer) \n", attr);
-  } else if (IsAllocatable()) {
-    std::fprintf(f, "  attribute %d (allocatable)\n", attr);
-  } else {
-    std::fprintf(f, "  attribute %d\n", attr);
-  }
-
+  std::fprintf(f, "  rank      %d\n", static_cast<int>(raw_.rank));
+  std::fprintf(f, "  type      %d\n", static_cast<int>(raw_.type));
+  std::fprintf(f, "  attribute %d\n", static_cast<int>(raw_.attribute));
   std::fprintf(f, "  extra     %d\n", static_cast<int>(raw_.extra));
   std::fprintf(f, "    addendum  %d\n", static_cast<int>(HasAddendum()));
   std::fprintf(f, "    alloc_idx %d\n", static_cast<int>(GetAllocIdx()));

flang-rt/lib/runtime/extensions.cpp

@@ -416,14 +416,6 @@ std::int64_t RTNAME(time)() { return time(nullptr); }
 // MCLOCK: returns accumulated CPU time in ticks
 std::int32_t FORTRAN_PROCEDURE_NAME(mclock)() { return std::clock(); }
 
-void RTNAME(ShowDescriptor)(const Fortran::runtime::Descriptor *descr) {
-  if (descr) {
-    descr->Dump(stderr, /*dumpRawType=*/false);
-  } else {
-    std::fprintf(stderr, "NULL\n");
-  }
-}
-
 static void _internal_srand(int seed) { rand_seed = seed ? seed : 123459876; }
 
 // IRAND(I)

flang-rt/unittests/Runtime/Descriptor.cpp

@@ -9,7 +9,6 @@
 #include "flang-rt/runtime/descriptor.h"
 #include "tools.h"
 #include "gtest/gtest.h"
-#include <regex>
 
 using namespace Fortran::runtime;
 
@@ -159,115 +158,3 @@ TEST(Descriptor, FixedStride) {
   EXPECT_TRUE(descriptor.IsContiguous());
   EXPECT_EQ(descriptor.FixedStride().value_or(-666), 0);
 }
-
-static std::string getAddrFilteredContent(FILE *fin) {
-  rewind(fin);
-  std::ostringstream content;
-  char buffer[1024];
-  size_t bytes_read;
-  while ((bytes_read = fread(buffer, 1, sizeof(buffer), fin)) > 0) {
-    content.write(buffer, bytes_read);
-  }
-  return std::regex_replace(
-      content.str(), std::regex("(0x[0-9a-fA-F]*)"), "[address]");
-}
-
-TEST(Descriptor, Dump) {
-  StaticDescriptor<4> staticDesc[2];
-  Descriptor &descriptor{staticDesc[0].descriptor()};
-  using Type = std::int32_t;
-  Type data[8][8][8];
-  constexpr int four{static_cast<int>(sizeof data[0][0][0])};
-  TypeCode integer{TypeCategory::Integer, four};
-  // Scalar
-  descriptor.Establish(integer, four, data, 0);
-  FILE *tmpf = tmpfile();
-  ASSERT_TRUE(tmpf) << "tmpfile returned NULL";
-  auto resetTmpFile = [tmpf]() {
-    rewind(tmpf);
-    ftruncate(fileno(tmpf), 0);
-  };
-
-  descriptor.Dump(tmpf, /*dumpRawType=*/false);
-  // also dump as CFI type
-  descriptor.Dump(tmpf, /*dumpRawType=*/true);
-  std::string output = getAddrFilteredContent(tmpf);
-  ASSERT_STREQ(output.c_str(),
-      "Descriptor @ [address]:\n"
-      "  base_addr [address]\n"
-      "  elem_len  4\n"
-      "  version   20240719\n"
-      "  scalar\n"
-      "  type      9 \"INTEGER(kind=4)\"\n"
-      "  attribute 0\n"
-      "  extra     0\n"
-      "    addendum  0\n"
-      "    alloc_idx 0\n"
-      "Descriptor @ [address]:\n"
-      "  base_addr [address]\n"
-      "  elem_len  4\n"
-      "  version   20240719\n"
-      "  scalar\n"
-      "  type      9 \"CFI_type_int32_t\"\n"
-      "  attribute 0\n"
-      "  extra     0\n"
-      "    addendum  0\n"
-      "    alloc_idx 0\n");
-
-  // Contiguous matrix (0:7, 0:7)
-  SubscriptValue extent[3]{8, 8, 8};
-  descriptor.Establish(integer, four, data, 2, extent);
-  resetTmpFile();
-  descriptor.Dump(tmpf, /*dumpRawType=*/false);
-  output = getAddrFilteredContent(tmpf);
-  ASSERT_STREQ(output.c_str(),
-      "Descriptor @ [address]:\n"
-      "  base_addr [address]\n"
-      "  elem_len  4\n"
-      "  version   20240719\n"
-      "  rank      2\n"
-      "  type      9 \"INTEGER(kind=4)\"\n"
-      "  attribute 0\n"
-      "  extra     0\n"
-      "    addendum  0\n"
-      "    alloc_idx 0\n"
-      "  dim[0] lower_bound 0\n"
-      "         extent      8\n"
-      "         sm          4\n"
-      "  dim[1] lower_bound 0\n"
-      "         extent      8\n"
-      "         sm          32\n");
-
-  TypeCode real{TypeCategory::Real, four};
-  // Discontiguous real 3-D array (0:7, 0:6:2, 0:6:2)
-  descriptor.Establish(real, four, data, 3, extent);
-  descriptor.GetDimension(1).SetExtent(4);
-  descriptor.GetDimension(1).SetByteStride(8 * 2 * four);
-  descriptor.GetDimension(2).SetExtent(4);
-  descriptor.GetDimension(2).SetByteStride(8 * 8 * 2 * four);
-
-  resetTmpFile();
-  descriptor.Dump(tmpf, /*dumpRawType=*/false);
-  output = getAddrFilteredContent(tmpf);
-  ASSERT_STREQ(output.c_str(),
-      "Descriptor @ [address]:\n"
-      "  base_addr [address]\n"
-      "  elem_len  4\n"
-      "  version   20240719\n"
-      "  rank      3\n"
-      "  type      27 \"REAL(kind=4)\"\n"
-      "  attribute 0\n"
-      "  extra     0\n"
-      "    addendum  0\n"
-      "    alloc_idx 0\n"
-      "  dim[0] lower_bound 0\n"
-      "         extent      8\n"
-      "         sm          4\n"
-      "  dim[1] lower_bound 0\n"
-      "         extent      4\n"
-      "         sm          64\n"
-      "  dim[2] lower_bound 0\n"
-      "         extent      4\n"
-      "         sm          512\n");
-  fclose(tmpf);
-}

flang/docs/Intrinsics.md

@@ -1414,48 +1414,6 @@ This is prefixed by `STRING`, a colon and a space.
 - **Class:** subroutine
 - **Syntax:** `CALL PERROR(STRING)`
 
-### Non-Standard Intrinsics: SHOW_DESCRIPTOR
-
-#### Description
-`SHOW_DESCRIPTOR(VAR)` prints (on the C stderr stream) a contents of a descriptor for the variable VAR,
-which can be of any type and rank, including scalars.
-Requires use of flang_debug module.
-
-Here is an example of its output:
-```
-Descriptor @ 0x7ffe506fc368:
-  base_addr 0x55944caef0f0
-  elem_len  4
-  version   20240719
-  rank      1
-  type      9 "INTEGER(kind=4)"
-  attribute 2 (allocatable)
-  extra     0
-    addendum  0
-    alloc_idx 0
-  dim[0] lower_bound 1
-         extent      5
-         sm          4
-```
-
-#### Usage and Info
-- **Standard:** flang extension
-- **Class:** subroutine
-- **Syntax:** `CALL show_descriptor(VAR)`
-
-#### Example
-```Fortran
-subroutine test
-  use flang_debug
-  implicit none
-  character(len=9) :: c = 'Hey buddy'
-  integer :: a(5)
-  call show_descriptor(c)
-  call show_descriptor(c(1:3))
-  call show_descriptor(a)
-end subroutine test
-```
-
 ### Non-Standard Intrinsics: SRAND
 
 #### Description

flang/include/flang/Optimizer/Builder/IntrinsicCall.h

@@ -413,7 +413,6 @@ struct IntrinsicLibrary {
   template <typename Shift>
   mlir::Value genShift(mlir::Type resultType, llvm::ArrayRef<mlir::Value>);
   mlir::Value genShiftA(mlir::Type resultType, llvm::ArrayRef<mlir::Value>);
-  void genShowDescriptor(llvm::ArrayRef<fir::ExtendedValue>);
   mlir::Value genSign(mlir::Type, llvm::ArrayRef<mlir::Value>);
   mlir::Value genSind(mlir::Type, llvm::ArrayRef<mlir::Value>);
   mlir::Value genSinpi(mlir::Type, llvm::ArrayRef<mlir::Value>);

flang/include/flang/Optimizer/Builder/Runtime/Intrinsics.h

@@ -111,9 +111,6 @@ void genSleep(fir::FirOpBuilder &builder, mlir::Location loc,
 mlir::Value genChdir(fir::FirOpBuilder &builder, mlir::Location loc,
                      mlir::Value name);
 
-/// generate dump of a descriptor
-void genShowDescriptor(fir::FirOpBuilder &builder, mlir::Location loc,
-                       mlir::Value descriptor);
 
 mlir::Value genIrand(fir::FirOpBuilder &builder, mlir::Location loc,
                      mlir::Value i);