Move some complex simplifications to match.pd

2015-08-31  Marc Glisse  <marc.glisse@inria.fr>

gcc/
	* match.pd (SIN, COS, TAN, COSH): Reorder for consistency.
	(CEXPI): New operator list.
	(real (conj (x)), imag (conj (x)), real (x +- y), real (cexpi (x)),
	imag (cexpi (x)), conj (conj (x)), conj (complex (x, y))):
	Converted from ...
	* fold-const.c (fold_unary_loc, fold_binary_loc): ... here. Remove.

gcc/testsuite/
	* gcc.dg/tree-ssa/complex-7.c: New file.

From-SVN: r227343

5 files changed, 63 insertions, 94 deletions

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index 2d34359..0e97a19 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,12 @@
+2015-08-31  Marc Glisse  <marc.glisse@inria.fr>
+
+	* match.pd (SIN, COS, TAN, COSH): Reorder for consistency.
+	(CEXPI): New operator list.
+	(real (conj (x)), imag (conj (x)), real (x +- y), real (cexpi (x)),
+	imag (cexpi (x)), conj (conj (x)), conj (complex (x, y))):
+	Converted from ...
+	* fold-const.c (fold_unary_loc, fold_binary_loc): ... here. Remove.
+
 2015-08-31  Tom de Vries  <tom@codesourcery.com>
 
 	* tree-ssa-loop-manip.c (find_uses_to_rename_stmt)
diff --git a/gcc/fold-const.c b/gcc/fold-const.c
index c826e67..a5d58a8 100644
--- a/gcc/fold-const.c
+++ b/gcc/fold-const.c
@@ -7732,21 +7732,6 @@ fold_unary_loc (location_t loc, enum tree_code code, tree type, tree op0)
 	}
       return NULL_TREE;
 
-    case CONJ_EXPR:
-      if (TREE_CODE (TREE_TYPE (arg0)) != COMPLEX_TYPE)
-	return fold_convert_loc (loc, type, arg0);
-      if (TREE_CODE (arg0) == COMPLEX_EXPR)
-	{
-	  tree itype = TREE_TYPE (type);
-	  tree rpart = fold_convert_loc (loc, itype, TREE_OPERAND (arg0, 0));
-	  tree ipart = fold_convert_loc (loc, itype, TREE_OPERAND (arg0, 1));
-	  return fold_build2_loc (loc, COMPLEX_EXPR, type, rpart,
-			      negate_expr (ipart));
-	}
-      if (TREE_CODE (arg0) == CONJ_EXPR)
-	return fold_convert_loc (loc, type, TREE_OPERAND (arg0, 0));
-      return NULL_TREE;
-
     case BIT_NOT_EXPR:
       /* Convert ~(X ^ Y) to ~X ^ Y or X ^ ~Y if ~X or ~Y simplify.  */
       if (TREE_CODE (arg0) == BIT_XOR_EXPR
@@ -7776,81 +7761,6 @@ fold_unary_loc (location_t loc, enum tree_code code, tree type, tree op0)
 	return NULL_TREE;
       return fold_convert_loc (loc, type, tem);
 
-    case REALPART_EXPR:
-      if (TREE_CODE (TREE_TYPE (arg0)) != COMPLEX_TYPE)
-	return fold_convert_loc (loc, type, arg0);
-      if (TREE_CODE (arg0) == PLUS_EXPR || TREE_CODE (arg0) == MINUS_EXPR)
-	{
-	  tree itype = TREE_TYPE (TREE_TYPE (arg0));
-	  tem = fold_build2_loc (loc, TREE_CODE (arg0), itype,
-			     fold_build1_loc (loc, REALPART_EXPR, itype,
-					  TREE_OPERAND (arg0, 0)),
-			     fold_build1_loc (loc, REALPART_EXPR, itype,
-					  TREE_OPERAND (arg0, 1)));
-	  return fold_convert_loc (loc, type, tem);
-	}
-      if (TREE_CODE (arg0) == CONJ_EXPR)
-	{
-	  tree itype = TREE_TYPE (TREE_TYPE (arg0));
-	  tem = fold_build1_loc (loc, REALPART_EXPR, itype,
-			     TREE_OPERAND (arg0, 0));
-	  return fold_convert_loc (loc, type, tem);
-	}
-      if (TREE_CODE (arg0) == CALL_EXPR)
-	{
-	  tree fn = get_callee_fndecl (arg0);
-	  if (fn && DECL_BUILT_IN_CLASS (fn) == BUILT_IN_NORMAL)
-	    switch (DECL_FUNCTION_CODE (fn))
-	      {
-	      CASE_FLT_FN (BUILT_IN_CEXPI):
-	        fn = mathfn_built_in (type, BUILT_IN_COS);
-		if (fn)
-	          return build_call_expr_loc (loc, fn, 1, CALL_EXPR_ARG (arg0, 0));
-		break;
-
-	      default:
-		break;
-	      }
-	}
-      return NULL_TREE;
-
-    case IMAGPART_EXPR:
-      if (TREE_CODE (TREE_TYPE (arg0)) != COMPLEX_TYPE)
-	return build_zero_cst (type);
-      if (TREE_CODE (arg0) == PLUS_EXPR || TREE_CODE (arg0) == MINUS_EXPR)
-	{
-	  tree itype = TREE_TYPE (TREE_TYPE (arg0));
-	  tem = fold_build2_loc (loc, TREE_CODE (arg0), itype,
-			     fold_build1_loc (loc, IMAGPART_EXPR, itype,
-					  TREE_OPERAND (arg0, 0)),
-			     fold_build1_loc (loc, IMAGPART_EXPR, itype,
-					  TREE_OPERAND (arg0, 1)));
-	  return fold_convert_loc (loc, type, tem);
-	}
-      if (TREE_CODE (arg0) == CONJ_EXPR)
-	{
-	  tree itype = TREE_TYPE (TREE_TYPE (arg0));
-	  tem = fold_build1_loc (loc, IMAGPART_EXPR, itype, TREE_OPERAND (arg0, 0));
-	  return fold_convert_loc (loc, type, negate_expr (tem));
-	}
-      if (TREE_CODE (arg0) == CALL_EXPR)
-	{
-	  tree fn = get_callee_fndecl (arg0);
-	  if (fn && DECL_BUILT_IN_CLASS (fn) == BUILT_IN_NORMAL)
-	    switch (DECL_FUNCTION_CODE (fn))
-	      {
-	      CASE_FLT_FN (BUILT_IN_CEXPI):
-	        fn = mathfn_built_in (type, BUILT_IN_SIN);
-		if (fn)
-	          return build_call_expr_loc (loc, fn, 1, CALL_EXPR_ARG (arg0, 0));
-		break;
-
-	      default:
-		break;
-	      }
-	}
-      return NULL_TREE;
-
     case INDIRECT_REF:
       /* Fold *&X to X if X is an lvalue.  */
       if (TREE_CODE (op0) == ADDR_EXPR)
diff --git a/gcc/match.pd b/gcc/match.pd
index 289bc5c..50de7bb 100644
--- a/gcc/match.pd
+++ b/gcc/match.pd
@@ -55,10 +55,11 @@ along with GCC; see the file COPYING3.  If not see
 (define_operator_list POW10 BUILT_IN_POW10F BUILT_IN_POW10 BUILT_IN_POW10L)
 (define_operator_list SQRT BUILT_IN_SQRTF BUILT_IN_SQRT BUILT_IN_SQRTL)
 (define_operator_list CBRT BUILT_IN_CBRTF BUILT_IN_CBRT BUILT_IN_CBRTL)
-(define_operator_list SIN BUILT_IN_SIN BUILT_IN_SINL BUILT_IN_SINF)
-(define_operator_list COS BUILT_IN_COS BUILT_IN_COSL BUILT_IN_COSF)
-(define_operator_list TAN BUILT_IN_TAN BUILT_IN_TANL BUILT_IN_TANF)
-(define_operator_list COSH BUILT_IN_COSH BUILT_IN_COSHL BUILT_IN_COSHF)
+(define_operator_list SIN BUILT_IN_SINF BUILT_IN_SIN BUILT_IN_SINL)
+(define_operator_list COS BUILT_IN_COSF BUILT_IN_COS BUILT_IN_COSL)
+(define_operator_list TAN BUILT_IN_TANF BUILT_IN_TAN BUILT_IN_TANL)
+(define_operator_list COSH BUILT_IN_COSHF BUILT_IN_COSH BUILT_IN_COSHL)
+(define_operator_list CEXPI BUILT_IN_CEXPIF BUILT_IN_CEXPI BUILT_IN_CEXPIL)
 
 /* Simplifications of operations with one constant operand and
    simplifications to constants or single values.  */
@@ -1312,6 +1313,36 @@ along with GCC; see the file COPYING3.  If not see
  (imagpart (complex @0 @1))
  @1)
 
+/* Sometimes we only care about half of a complex expression.  */
+(simplify
+ (realpart (convert?:s (conj:s @0)))
+ (convert (realpart @0)))
+(simplify
+ (imagpart (convert?:s (conj:s @0)))
+ (convert (negate (imagpart @0))))
+(for part (realpart imagpart)
+ (for op (plus minus)
+  (simplify
+   (part (convert?:s@2 (op:s @0 @1)))
+   (convert (op (part @0) (part @1))))))
+(simplify
+ (realpart (convert?:s (CEXPI:s @0)))
+ (convert (COS @0)))
+(simplify
+ (imagpart (convert?:s (CEXPI:s @0)))
+ (convert (SIN @0)))
+
+/* conj(conj(x)) -> x  */
+(simplify
+ (conj (convert? (conj @0)))
+ (if (tree_nop_conversion_p (TREE_TYPE (@0), type))
+  (convert @0)))
+
+/* conj({x,y}) -> {x,-y}  */
+(simplify
+ (conj (convert?:s (complex:s @0 @1)))
+ (with { tree itype = TREE_TYPE (type); }
+  (complex (convert:itype @0) (negate (convert:itype @1)))))
 
 /* BSWAP simplifications, transforms checked by gcc.dg/builtin-bswap-8.c.  */
 (for bswap (BUILT_IN_BSWAP16 BUILT_IN_BSWAP32 BUILT_IN_BSWAP64)
diff --git a/gcc/testsuite/ChangeLog b/gcc/testsuite/ChangeLog
index 8869251..24f9314 100644
--- a/gcc/testsuite/ChangeLog
+++ b/gcc/testsuite/ChangeLog
@@ -1,3 +1,7 @@
+2015-08-31  Marc Glisse  <marc.glisse@inria.fr>
+
+	* gcc.dg/tree-ssa/complex-7.c: New file.
+
 2015-08-30  Bill Schmidt  <wschmidt@linux.vnet.ibm.com>
 
 	* gcc.target/powerpc/swaps-p8-19.c: New test.
diff --git a/gcc/testsuite/gcc.dg/tree-ssa/complex-7.c b/gcc/testsuite/gcc.dg/tree-ssa/complex-7.c
new file mode 100644
index 0000000..20a2a37
--- /dev/null
+++ b/gcc/testsuite/gcc.dg/tree-ssa/complex-7.c
@@ -0,0 +1,15 @@
+/* { dg-do compile } */
+/* { dg-options "-O -fdump-tree-forwprop1" } */
+
+float f(_Complex float x, _Complex float y){
+  x += y;
+  return __builtin_cimagf (x);
+}
+
+double g(double x){
+  _Complex double c = __builtin_cexpi (x);
+  return __builtin_creal (c);
+}
+
+/* { dg-final { scan-tree-dump "__builtin_cos" "forwprop1"} } */
+/* { dg-final { scan-tree-dump-times "IMAGPART_EXPR" 2 "forwprop1"} } */