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re PR rtl-optimization/21848 (load_mems / replace_loop_mems bug causes miscompilation of jcf-io.c / SEGV while processing java/lang/AbstractMethodError)

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PR rtl-optimization/21848
	* calls.c (emit_library_call_value_1): For const functions, add
	USEs of the stack slots to CALL_INSN_FUNCTION_USAGE.

From-SVN: r102281
This commit is contained in:
J"orn Rennecke 2005-07-22 12:15:37 +00:00 committed by Joern Rennecke
parent 29c1846ba3
commit 475a3eef78
2 changed files with 26 additions and 0 deletions
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4
gcc/ChangeLog
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@ -1,5 +1,9 @@
2005-07-22 J"orn Rennecke <joern.rennecke@st.com>
PR rtl-optimization/21848
* calls.c (emit_library_call_value_1): For const functions, add
USEs of the stack slots to CALL_INSN_FUNCTION_USAGE.
PR rtl-optimization/22445
* cselib.c (target.h): Include.
(rtx_equal_for_cselib_p): Allow commutative matches.

22
gcc/calls.c
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@ -3623,6 +3623,28 @@ emit_library_call_value_1 (int retval, rtx orgfun, rtx value,
stack_usage_map[i] = 1;
NO_DEFER_POP;
if (flags & ECF_CONST)
{
rtx use;
/* Indicate argument access so that alias.c knows that these
values are live. */
if (argblock)
use = plus_constant (argblock,
argvec[argnum].locate.offset.constant);
else
/* When arguemnts are pushed, trying to tell alias.c where
exactly this argument is won't work, because the
auto-increment causes confusion. So we merely indicate
that we access something with a known mode somewhere on
the stack. */
use = gen_rtx_PLUS (Pmode, virtual_outgoing_args_rtx,
gen_rtx_SCRATCH (Pmode));
use = gen_rtx_MEM (argvec[argnum].mode, use);
use = gen_rtx_USE (VOIDmode, use);
call_fusage = gen_rtx_EXPR_LIST (VOIDmode, use, call_fusage);
}
}
}