The problem is due to prologue_seq in
thread_prologue_and_epilogue_insns() being uninitialised and defaulting
to the value of '1'. This is an invalid rtx pointer which fails
downstream in emit_insn().
On my cross compiler, prologue_seq happened to be a good value and hence
inserts wrong code instead of failing.
The change was introduced in gcc-linaro/4.5,revno=99474 as part of the
shrink-wrap optimisation. It should happen on other naked functions.
Initialising prologue_seq to NULL_RTX should work around the problem.
** Changed in: gcc-linaro
Status: Incomplete => Triaged
** Changed in: gcc-linaro
Importance: Undecided => Critical
** Changed in: gcc-linaro
Milestone: None => 4.5-2011.04-0
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https://bugs.launchpad.net/bugs/731665
Title:
internal compiler error compiling kernel on powerpc
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