convert.c (strip_float_extensions): Look for narrowest type handling FP constants.
* convert.c (strip_float_extensions): Look for narrowest type handling FP constants. * fold-const.c (fold): Fold (double)float1 CMP (double)float2 into float1 CMP float2. * convert.c (strip_float_extensions): Make global. * tree.h (strip_float_extensions): Declare. * gcc.dg/i386-fpcvt-1.c: New test. * gcc.dg/i386-fpcvt-2.c: New test. From-SVN: r61279
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@ -1,3 +1,13 @@
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Tue Jan 14 00:45:33 CET 2003 Jan Hubicka <jh@suse.cz>
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* convert.c (strip_float_extensions): Look for narrowest type handling
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FP constants.
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* fold-const.c (fold): Fold (double)float1 CMP (double)float2 into
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float1 CMP float2.
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* convert.c (strip_float_extensions): Make global.
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* tree.h (strip_float_extensions): Declare.
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2003-01-14 Gabriel Dos Reis <gdr@integrable-solutions.net>
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* timevar.def: define TV_NAME_LOOKUP.
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@ -1215,7 +1215,7 @@ c-objc-common.o : c-objc-common.c $(CONFIG_H) $(SYSTEM_H) coretypes.h $(TM_H) $(
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c-aux-info.o : c-aux-info.c $(CONFIG_H) $(SYSTEM_H) coretypes.h $(TM_H) $(TREE_H) \
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$(C_TREE_H) flags.h toplev.h
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c-convert.o : c-convert.c $(CONFIG_H) $(SYSTEM_H) coretypes.h $(TM_H) $(TREE_H) \
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flags.h toplev.h $(C_COMMON_H)
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flags.h toplev.h $(C_COMMON_H) real.h
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c-pragma.o: c-pragma.c $(CONFIG_H) $(SYSTEM_H) coretypes.h $(TM_H) $(RTL_H) $(TREE_H) \
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function.h c-pragma.h toplev.h output.h $(GGC_H) $(TM_P_H) $(C_COMMON_H) gt-c-pragma.h
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mbchar.o: mbchar.c $(CONFIG_H) $(SYSTEM_H) coretypes.h $(TM_H) mbchar.h
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@ -32,8 +32,7 @@ Software Foundation, 59 Temple Place - Suite 330, Boston, MA
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#include "convert.h"
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#include "toplev.h"
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#include "langhooks.h"
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static tree strip_float_extensions PARAMS ((tree));
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#include "real.h"
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/* Convert EXPR to some pointer or reference type TYPE.
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EXPR must be pointer, reference, integer, enumeral, or literal zero;
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@ -75,12 +74,33 @@ convert_to_pointer (type, expr)
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}
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/* Avoid any floating point extensions from EXP. */
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static tree
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tree
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strip_float_extensions (exp)
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tree exp;
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{
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tree sub, expt, subt;
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/* For floating point constant look up the narrowest type that can hold
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it properly and handle it like (type)(narrowest_type)constant.
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This way we can optimize for instance a=a*2.0 where "a" is float
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but 2.0 is double constant. */
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if (TREE_CODE (exp) == REAL_CST)
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{
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REAL_VALUE_TYPE orig;
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tree type = NULL;
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orig = TREE_REAL_CST (exp);
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if (TYPE_PRECISION (TREE_TYPE (exp)) > TYPE_PRECISION (float_type_node)
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&& exact_real_truncate (TYPE_MODE (float_type_node), &orig))
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type = float_type_node;
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else if (TYPE_PRECISION (TREE_TYPE (exp))
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> TYPE_PRECISION (double_type_node)
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&& exact_real_truncate (TYPE_MODE (double_type_node), &orig))
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type = double_type_node;
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if (type)
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return build_real (type, real_value_truncate (TYPE_MODE (type), orig));
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}
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if (TREE_CODE (exp) != NOP_EXPR)
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return exp;
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@ -6041,6 +6041,18 @@ fold (expr)
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if (FLOAT_TYPE_P (TREE_TYPE (arg0)))
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{
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tree targ0 = strip_float_extensions (arg0);
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tree targ1 = strip_float_extensions (arg1);
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tree newtype = TREE_TYPE (targ0);
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if (TYPE_PRECISION (TREE_TYPE (targ1)) > TYPE_PRECISION (newtype))
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newtype = TREE_TYPE (targ1);
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/* Fold (double)float1 CMP (double)float2 into float1 CMP float2. */
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if (TYPE_PRECISION (newtype) < TYPE_PRECISION (TREE_TYPE (arg0)))
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return fold (build (code, type, convert (newtype, targ0),
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convert (newtype, targ1)));
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/* (-a) CMP (-b) -> b CMP a */
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if (TREE_CODE (arg0) == NEGATE_EXPR
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&& TREE_CODE (arg1) == NEGATE_EXPR)
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@ -1,3 +1,8 @@
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Tue Jan 14 00:45:03 CET 2003 Jan Hubicka <jh@suse.cz>
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* gcc.dg/i386-fpcvt-1.c: New test.
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* gcc.dg/i386-fpcvt-2.c: New test.
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2003-01-14 Eric Botcazou <ebotcazou@libertysurf.fr>
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* gcc.dg/i386-mmx-3.c: New test.
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@ -0,0 +1,8 @@
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/* { dg-do compile { target i?86-*-* x86_64-*-* } } */
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/* { dg-options "-O2 -msse2 -march=athlon" } */
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/* { dg-final { scan-assembler-not "cvtss2sd" } } */
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float a,b;
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main()
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{
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a=b*3.0;
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}
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@ -0,0 +1,8 @@
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/* { dg-do compile { target i?86-*-* x86_64-*-* } } */
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/* { dg-options "-O2 -msse2 -march=athlon" } */
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/* { dg-final { scan-assembler-not "cvtss2sd" } } */
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float a,b;
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main()
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{
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return a<0.0;
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}
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@ -2929,6 +2929,9 @@ extern tree fold_builtin PARAMS ((tree));
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extern enum built_in_function builtin_mathfn_code PARAMS ((tree));
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extern tree build_function_call_expr PARAMS ((tree, tree));
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/* In convert.c */
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extern tree strip_float_extensions PARAMS ((tree));
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/* In alias.c */
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extern void record_component_aliases PARAMS ((tree));
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extern HOST_WIDE_INT get_alias_set PARAMS ((tree));
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