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From: Manjunath Matti <mmatti.gcc@gmail.com> To: gcc-bugs@gcc.gnu.org Cc: ramana.radhakrishnan@linaro.org, Christophe Lyon <christophe.lyon@st.com> Subject: ARM/NEON: vld1q_dup_s64 builtin Date: Wed, 21 Nov 2012 10:08:00 -0000 [thread overview] Message-ID: <CA+q7Fi4s4wQZ2aTnDq1XDKC0610CjGxbB3A+AZw-sW65vA1B_g@mail.gmail.com> (raw) Hi, I have encountered a following ICE on arm big endian target {{{ neon-vld1_dupQ.c: In function ‘main’: neon-vld1_dupQ.c:24:1: error: unrecognizable insn: (insn 94 93 31 (set (subreg:DI (reg:V2DI 95 d16 [orig:137 D.14400 ] [137]) 0) (subreg:DI (reg:V2DI 95 d16 [orig:137 D.14400 ] [137]) 8)) /home/armbe/toolchain/armeb-tools/bin/../lib/gcc/armeb-montavista-linux-gnueabi/4.7.0/include/arm_neon.h:8214 -1 (nil)) neon-vld1_dupQ.c:24:1: internal compiler error: in extract_insn, at recog.c:2123 Please submit a full bug report, }}} My initial investigation shows that the following patch (split insn) http://gcc.gnu.org/ml/gcc-patches/2012-05/msg01131.html is causing this failure. I think the CANNOT_CHANGE_MODE_CLASS macro is present and also plays a role in not allowing the mov of DImode in this case. If I revert the patch then I do not encounter this problem. Could you help me with the pointers to solve this problem. Regards, Manjunath S Matti.
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