[PATCH, tree-optimization]: FIX PR 36129; [4.3, 4.4 Regression] ICE with -fprofile-use

["Uros Bizjak" <ubizjak at gmail dot com>]

Hello!

As shown in the PR audit trail [1], "verify_histograms fail" ICE is
triggered by "fold all builtins" pass where __builtin_memset() is
folded/CCPed to a constant. If there is a histogram attached to
__builtin_memset (as is the case in the PR), removing stmt without
removing histogram leads to ICE.

Attached patch calls gimple_remove_stmt_histograms, when builtin was
folded to a constant. I was not able to extract a testcase from
attached huge testcase, but  the patch fixes the ICE with original
CP2K build (+ a duplicate PR).

2008-05-09  Uros Bizjak  <ubizjak@gmail.com>

	PR tree-optimization/36129
	* tree-ssa-cpp.c: Include value-prof.h.
	(execute_fold_all_builtins): Call gimple_remove_stmt_histograms if
	built-in function was folded to a constant.
	* Makefile.in (tree-ssa-cpp.c): Depend on value-prof.h

Patch was bootstrapped and regression tested on i686-pc-linux-gnu. OK
for mainline?

[1] http://gcc.gnu.org/bugzilla/show_bug.cgi?id=36129

Thanks,
Uros.

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