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re PR middle-end/67653 (ICE on valid code on x86_64-linux-gnu: verify_gimple failed) 

PR middle-end/67653
	* gimplify.c (gimplify_asm_expr): Warn if it is too late to
	attempt to mark memory input operand addressable and
	call prepare_gimple_addressable in that case.  Don't adjust
	input_location for diagnostics, use error_at instead.

	* c-c++-common/pr67653.c: New test.
	* gcc.dg/torture/pr29119.c: Add dg-warning.

From-SVN: r232640
This commit is contained in:
Jakub Jelinek 2016-01-21 00:43:58 +01:00 committed by Jakub Jelinek
parent 26a2e6aed4
commit bdd3aea68b
5 changed files with 52 additions and 5 deletions
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8
gcc/ChangeLog
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@ -1,3 +1,11 @@
2016-01-21 Jakub Jelinek <jakub@redhat.com>
PR middle-end/67653
* gimplify.c (gimplify_asm_expr): Warn if it is too late to
attempt to mark memory input operand addressable and
call prepare_gimple_addressable in that case. Don't adjust
input_location for diagnostics, use error_at instead.
2016-01-20 Peter Bergner <bergner@vnet.ibm.com>
* config/rs6000/ppc-auxv.h: New file.

32
gcc/gimplify.c
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@ -5305,12 +5305,38 @@ gimplify_asm_expr (tree *expr_p, gimple_seq *pre_p, gimple_seq *post_p)
TREE_VALUE (link) = error_mark_node;
tret = gimplify_expr (&TREE_VALUE (link), pre_p, post_p,
is_gimple_lvalue, fb_lvalue | fb_mayfail);
if (tret != GS_ERROR)
{
/* Unlike output operands, memory inputs are not guaranteed
to be lvalues by the FE, and while the expressions are
marked addressable there, if it is e.g. a statement
expression, temporaries in it might not end up being
addressable. They might be already used in the IL and thus
it is too late to make them addressable now though. */
tree x = TREE_VALUE (link);
while (handled_component_p (x))
x = TREE_OPERAND (x, 0);
if (TREE_CODE (x) == MEM_REF
&& TREE_CODE (TREE_OPERAND (x, 0)) == ADDR_EXPR)
x = TREE_OPERAND (TREE_OPERAND (x, 0), 0);
if ((TREE_CODE (x) == VAR_DECL
|| TREE_CODE (x) == PARM_DECL
|| TREE_CODE (x) == RESULT_DECL)
&& !TREE_ADDRESSABLE (x)
&& is_gimple_reg (x))
{
warning_at (EXPR_LOC_OR_LOC (TREE_VALUE (link),
input_location), 0,
"memory input %d is not directly addressable",
i);
prepare_gimple_addressable (&TREE_VALUE (link), pre_p);
}
}
mark_addressable (TREE_VALUE (link));
if (tret == GS_ERROR)
{
if (EXPR_HAS_LOCATION (TREE_VALUE (link)))
input_location = EXPR_LOCATION (TREE_VALUE (link));
error ("memory input %d is not directly addressable", i);
error_at (EXPR_LOC_OR_LOC (TREE_VALUE (link), input_location),
"memory input %d is not directly addressable", i);
ret = tret;
}
}

6
gcc/testsuite/ChangeLog
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@ -1,3 +1,9 @@
2016-01-21 Jakub Jelinek <jakub@redhat.com>
PR middle-end/67653
* c-c++-common/pr67653.c: New test.
* gcc.dg/torture/pr29119.c: Add dg-warning.
2016-01-20 Peter Bergner <bergner@vnet.ibm.com>
* gcc.target/powerpc/cpu-builtin-1.c: New test.

8
gcc/testsuite/c-c++-common/pr67653.c Normal file
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@ -0,0 +1,8 @@
/* PR middle-end/67653 */
/* { dg-do compile } */
void
foo (void)
{
__asm__ ("" : : "m" (({ static int a; a; }))); /* { dg-warning "memory input 0 is not directly addressable" } */
}

3
gcc/testsuite/gcc.dg/torture/pr29119.c
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@ -2,6 +2,5 @@
void ldt_add_entry(void)
{
__asm__ ("" :: "m"(({unsigned __v; __v;})));
__asm__ ("" :: "m"(({unsigned __v; __v;}))); /* { dg-warning "memory input 0 is not directly addressable" } */
}