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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=10700
------- Additional Comments From janis187 at us dot ibm dot com 2003-06-25
00:59 -------
The (very old) regression in 10700 was introduced with this patch:
Sat Nov 27 08:38:26 1999 Richard Kenner <[EMAIL PROTECTED]>
* fold-const.c (negate_expr, associate_trees, extract_muldiv): New.
(split_tree): Completely rework to make more general.
(make_range, fold): Call negate_expr.
(fold, case NEGATE_EXPR): Simplify -(a-b) is -ffast-math.
(fold, associate): Call new split_tree and associate_trees.
(fold, case MULT_EXPR, case *_{DIV,MOD}_EXPR): Call extract_muldiv.
The test case used an alpha-linux cross cc1 on i686-pc-linux-gnu with
the minimized test case from comment #1 in the PR, compiled with
"-O3 -funroll-all-loops -fomit-frame-pointer -finline-functions".
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