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analyzer: gather builtin/internal fn handling into switch statements

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Clean up this code in preparation for fixing PR analyzer/96798.

gcc/analyzer/ChangeLog:
	* region-model.cc (region_model::on_call_pre): Gather handling of
	builtins and of internal fns into switch statements.  Handle
	"alloca" and BUILT_IN_ALLOCA_WITH_ALIGN.
This commit is contained in:
David Malcolm 2020-08-31 16:20:55 -04:00
parent 18056e45db
commit ee7bfbe5eb
1 changed files with 40 additions and 8 deletions
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48
gcc/analyzer/region-model.cc
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@ -652,18 +652,50 @@ region_model::on_call_pre (const gcall *call, region_model_context *ctxt)
in region-model-impl-calls.cc.
Having them split out into separate functions makes it easier
to put breakpoints on the handling of specific functions. */
if (is_named_call_p (callee_fndecl, "malloc", call, 1))
if (fndecl_built_in_p (callee_fndecl)
&& gimple_builtin_call_types_compatible_p (call, callee_fndecl))
switch (DECL_UNCHECKED_FUNCTION_CODE (callee_fndecl))
{
default:
break;
case BUILT_IN_ALLOCA:
case BUILT_IN_ALLOCA_WITH_ALIGN:
return impl_call_alloca (cd);
case BUILT_IN_CALLOC:
return impl_call_calloc (cd);
case BUILT_IN_EXPECT:
case BUILT_IN_EXPECT_WITH_PROBABILITY:
return impl_call_builtin_expect (cd);
case BUILT_IN_FREE:
/* Handle in "on_call_post". */
break;
case BUILT_IN_MALLOC:
return impl_call_malloc (cd);
case BUILT_IN_MEMSET:
impl_call_memset (cd);
return false;
break;
case BUILT_IN_STRLEN:
if (impl_call_strlen (cd))
return false;
break;
}
else if (gimple_call_internal_p (call))
switch (gimple_call_internal_fn (call))
{
default:
break;
case IFN_BUILTIN_EXPECT:
return impl_call_builtin_expect (cd);
}
else if (is_named_call_p (callee_fndecl, "malloc", call, 1))
return impl_call_malloc (cd);
else if (is_named_call_p (callee_fndecl, "calloc", call, 2))
return impl_call_calloc (cd);
else if (is_named_call_p (callee_fndecl, "__builtin_alloca", call, 1))
else if (is_named_call_p (callee_fndecl, "alloca", call, 1))
return impl_call_alloca (cd);
else if (gimple_call_builtin_p (call, BUILT_IN_EXPECT)
|| gimple_call_builtin_p (call, BUILT_IN_EXPECT_WITH_PROBABILITY)
|| gimple_call_internal_p (call, IFN_BUILTIN_EXPECT))
return impl_call_builtin_expect (cd);
else if (is_named_call_p (callee_fndecl, "memset", call, 3)
|| gimple_call_builtin_p (call, BUILT_IN_MEMSET))
else if (is_named_call_p (callee_fndecl, "memset", call, 3))
{
impl_call_memset (cd);
return false;