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re PR middle-end/19100 (Wrong code for ?-operator with casted ?-operator predicat)

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PR middle-end/19100
	* c-common.c: Include real.h.
	(c_common_truthvalue_conversion): Avoid destructively modifying expr.
	Correctly handle TREE_CONSTANT_OVERFLOW for INTEGER_CST.
	Correctly handle TREE_CONSTANT_OVERFLOW and NaNs for REAL_CST.
	* Makefile.in (c-common.o): Update dependencies.

	* gcc.dg/conv-3.c: New test case.

From-SVN: r92957
This commit is contained in:
Roger Sayle 2005-01-05 17:27:26 +00:00 committed by Roger Sayle
parent 9368fb8fbc
commit 010c4d9c14
4 changed files with 43 additions and 3 deletions
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9
gcc/ChangeLog
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@ -1,3 +1,12 @@
2005-01-05 Roger Sayle <roger@eyesopen.com>
PR middle-end/19100
* c-common.c: Include real.h.
(c_common_truthvalue_conversion): Avoid destructively modifying expr.
Correctly handle TREE_CONSTANT_OVERFLOW for INTEGER_CST.
Correctly handle TREE_CONSTANT_OVERFLOW and NaNs for REAL_CST.
* Makefile.in (c-common.o): Update dependencies.
2005-01-05 Joseph S. Myers <joseph@codesourcery.com>
* c-parse.in (asm_string): Add trailing semicolon.

14
gcc/c-common.c
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@ -46,6 +46,7 @@ Software Foundation, 59 Temple Place - Suite 330, Boston, MA
#include "hashtab.h"
#include "tree-mudflap.h"
#include "opts.h"
#include "real.h"
cpp_reader *parse_in; /* Declared in c-pragma.h. */
@ -2326,17 +2327,24 @@ c_common_truthvalue_conversion (tree expr)
case TRUTH_OR_EXPR:
case TRUTH_XOR_EXPR:
case TRUTH_NOT_EXPR:
TREE_TYPE (expr) = truthvalue_type_node;
if (TREE_TYPE (expr) != truthvalue_type_node)
return build2 (TREE_CODE (expr), truthvalue_type_node,
TREE_OPERAND (expr, 0), TREE_OPERAND (expr, 1));
return expr;
case ERROR_MARK:
return expr;
case INTEGER_CST:
return integer_zerop (expr) ? truthvalue_false_node : truthvalue_true_node;
/* Avoid integer_zerop to ignore TREE_CONSTANT_OVERFLOW. */
return (TREE_INT_CST_LOW (expr) != 0 || TREE_INT_CST_HIGH (expr) != 0)
? truthvalue_true_node
: truthvalue_false_node;
case REAL_CST:
return real_zerop (expr) ? truthvalue_false_node : truthvalue_true_node;
return real_compare (NE_EXPR, &TREE_REAL_CST (expr), &dconst0)
? truthvalue_true_node
: truthvalue_false_node;
case ADDR_EXPR:
{

5
gcc/testsuite/ChangeLog
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@ -1,3 +1,8 @@
2005-01-05 Roger Sayle <roger@eyesopen.com>
PR middle-end/19100
* gcc.dg/conv-3.c: New test case.
2005-01-05 Joseph S. Myers <joseph@codesourcery.com>
* gcc.dg/asm-wide-1.c: New test.

18
gcc/testsuite/gcc.dg/conv-3.c Normal file
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@ -0,0 +1,18 @@
/* PR middle-end/19100 */
/* { dg-do run } */
/* { dg-options "-O2" } */
void abort (void);
int test (int v)
{
return ((signed char) (v ? 0x100 : 0)) ? 17 : 18;
}
int main()
{
if (test (2) != 18)
abort ();
return 0;
}