[flang-commits] [PATCH] D107489: [flang] Support DFLOAT legacy extension intrinsic function

[Peter Klausler via Phabricator via flang-commits]

klausler created this revision.
klausler added a reviewer: PeteSteinfeld.
klausler added a project: Flang.
Herald added a subscriber: jdoerfert.
Herald added a reviewer: sscalpone.
klausler requested review of this revision.

Like the similar legacy extension FLOAT(), DFLOAT() represents a
conversion from default integer to DOUBLE PRECISION.  Rewrite
into a conversion operation.


https://reviews.llvm.org/D107489

Files:
  flang/docs/Extensions.md
  flang/lib/Evaluate/intrinsics.cpp
  flang/test/Semantics/dfloat.f90


Index: flang/test/Semantics/dfloat.f90
===================================================================
--- /dev/null
+++ flang/test/Semantics/dfloat.f90
@@ -0,0 +1,15 @@
+! RUN: %flang_fc1 -fdebug-unparse %s 2>&1 | FileCheck %s
+! Checks that a call to the legacy extension intrinsic function
+! DFLOAT is transmogrified into a type conversion operation.
+module m
+  !CHECK: d = 1._8
+  double precision :: d = dfloat(1)
+ contains
+  subroutine sub(n)
+    integer, intent(in) :: n
+    !CHECK: 2._8
+    print *, dfloat(2)
+    !CHECK: real(n,kind=8)
+    print *, dfloat(n)
+  end subroutine
+end module
Index: flang/lib/Evaluate/intrinsics.cpp
===================================================================
--- flang/lib/Evaluate/intrinsics.cpp
+++ flang/lib/Evaluate/intrinsics.cpp
@@ -817,7 +817,7 @@
 // TODO: Non-standard intrinsic functions
 //  AND, OR, XOR, LSHIFT, RSHIFT, SHIFT, ZEXT, IZEXT,
 //  COMPL, EQV, NEQV, INT8, JINT, JNINT, KNINT,
-//  QCMPLX, DFLOAT, QEXT, QFLOAT, QREAL, DNUM,
+//  QCMPLX, QEXT, QFLOAT, QREAL, DNUM,
 //  INUM, JNUM, KNUM, QNUM, RNUM, RAN, RANF, ILEN,
 //  MCLOCK, SECNDS, COTAN, IBCHNG, ISHA, ISHC, ISHL, IXOR
 //  IARG, IARGC, NARGS, NUMARG, BADDRESS, IADDR, CACHESIZE,
@@ -924,6 +924,7 @@
              {"y", AnyIntOrReal, Rank::elementalOrBOZ, Optionality::optional}},
          DoublePrecisionComplex},
         "cmplx", true},
+    {{"dfloat", {{"i", AnyInt}}, DoublePrecision}, "real", true},
     {{"dreal", {{"a", AnyComplex}}, DoublePrecision}, "real", true},
     {{"dconjg", {{"a", DoublePrecisionComplex}}, DoublePrecisionComplex},
         "conjg"},
Index: flang/docs/Extensions.md
===================================================================
--- flang/docs/Extensions.md
+++ flang/docs/Extensions.md
@@ -133,6 +133,7 @@
   the arguments as if they were operands to an intrinsic `+` operator,
   and defining the result type accordingly.
 * DOUBLE COMPLEX intrinsics DREAL, DCMPLX, DCONJG, and DIMAG.
+* The DFLOAT intrinsic function.
 * INT_PTR_KIND intrinsic returns the kind of c_intptr_t.
 * Restricted specific conversion intrinsics FLOAT, SNGL, IDINT, IFIX, DREAL,
   and DCMPLX accept arguments of any kind instead of only the default kind or


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