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[Bug rtl-optimization/36438] gcc ICE compiling code with mmx builtin
- From: "davidxl at gcc dot gnu dot org" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: 5 Jun 2008 06:41:38 -0000
- Subject: [Bug rtl-optimization/36438] gcc ICE compiling code with mmx builtin
- References: <bug-36438-16184@http.gcc.gnu.org/bugzilla/>
- Reply-to: gcc-bugzilla at gcc dot gnu dot org
------- Comment #1 from davidxl at gcc dot gnu dot org 2008-06-05 06:41 -------
cse1 (RTL) does some expression simplification on the fly such as
t = x << 4
r = t << 4
==>
r = x << 8
However for mmx shift operation, the mode (V1DI) for the const folding is
illegal -- resulting in ICE.
--
davidxl at gcc dot gnu dot org changed:
What |Removed |Added
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CC| |davidxl at gcc dot gnu dot
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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=36438