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re PR debug/53671 (Many guality test failures) 

PR debug/53671
PR debug/49888
* var-tracking.c (vt_initialize): Record initial offset between
arg pointer and stack pointer.

From-SVN: r188870
This commit is contained in:
Alexandre Oliva 2012-06-22 01:33:46 +00:00 committed by Alexandre Oliva
parent 4977e903b2
commit 48b00503b1
2 changed files with 42 additions and 0 deletions
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7
gcc/ChangeLog
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@ -1,3 +1,10 @@
2012-06-21 Alexandre Oliva <aoliva@redhat.com>
PR debug/53671
PR debug/49888
* var-tracking.c (vt_initialize): Record initial offset between
arg pointer and stack pointer.
2012-06-21 Alexandre Oliva <aoliva@redhat.com>
PR debug/53671

35
gcc/var-tracking.c
View File

@ -9504,6 +9504,41 @@ vt_initialize (void)
valvar_pool = NULL;
}
if (MAY_HAVE_DEBUG_INSNS)
{
rtx reg, expr;
int ofst;
cselib_val *val;
#ifdef FRAME_POINTER_CFA_OFFSET
reg = frame_pointer_rtx;
ofst = FRAME_POINTER_CFA_OFFSET (current_function_decl);
#else
reg = arg_pointer_rtx;
ofst = ARG_POINTER_CFA_OFFSET (current_function_decl);
#endif
ofst -= INCOMING_FRAME_SP_OFFSET;
val = cselib_lookup_from_insn (reg, GET_MODE (reg), 1,
VOIDmode, get_insns ());
preserve_value (val);
cselib_preserve_cfa_base_value (val, REGNO (reg));
expr = plus_constant (GET_MODE (stack_pointer_rtx),
stack_pointer_rtx, -ofst);
cselib_add_permanent_equiv (val, expr, get_insns ());
if (ofst)
{
val = cselib_lookup_from_insn (stack_pointer_rtx,
GET_MODE (stack_pointer_rtx), 1,
VOIDmode, get_insns ());
preserve_value (val);
expr = plus_constant (GET_MODE (reg), reg, ofst);
cselib_add_permanent_equiv (val, expr, get_insns ());
}
}
/* In order to factor out the adjustments made to the stack pointer or to
the hard frame pointer and thus be able to use DW_OP_fbreg operations
instead of individual location lists, we're going to rewrite MEMs based