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[Bug target/10700] [3.3/3.4 regression] ICE in copy_to_mode_reg on 64-bit targets
- From: "janis187 at us dot ibm dot com" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: 25 Jun 2003 01:00:03 -0000
- Subject: [Bug target/10700] [3.3/3.4 regression] ICE in copy_to_mode_reg on 64-bit targets
- References: <20030509082601.10700.rmurray@debian.org>
- Reply-to: gcc-bugzilla at gcc dot gnu dot org
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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 <kenner@vlsi1.ultra.nyu.edu>
* 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".