#1501: Panic in RegisterAlloc
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Reporter: guest | Owner:
Type: bug | Status: reopened
Priority: normal | Milestone:
Component: Compiler (NCG) | Version: 6.9
Severity: normal | Resolution:
Keywords: | Difficulty: Unknown
Os: Multiple | Testcase: cmm002
Architecture: x86 |
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Changes (by guest):
* status: closed => reopened
* version: 6.7 => 6.9
* resolution: fixed =>
* milestone: 6.8 branch =>
Comment:
I have found a new manifestation of this bug even when all the variables
are properly initialized.
{{{
stg_ap_0_fast {
bits32 y, x;
x = 16;
if (0 != 0) { /* Doesn't matter what is here */ }
y = bits32[x];
c7: goto c7;
}
}}}
The same panic happens but only when the '-dcmm-lint' option is specified.
Some of the {{{PrimOp.cmm}}} code {{{newPinnedByteArrayzh_fast}}} does
exactly this
and trips the bug once the call to {{{MAYBE_GC}}} is removed from that
function
which I have to do to convert the RTS to use the CPS pass.
-- Michael D. Adams
--
Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/1501#comment:3>
GHC <http://www.haskell.org/ghc/>
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