#1500: NCG: shortcutBranch doesn't handle loops properly
-------------------------------+--------------------------------------------
Reporter: Michael D. Adams | Owner:
Type: bug | Status: closed
Priority: normal | Milestone: 6.12.3
Component: Compiler (NCG) | Version: 6.7
Resolution: fixed | Keywords:
Difficulty: Unknown | Os: Unknown/Multiple
Testcase: cmm001 | Architecture: x86
Failure: None/Unknown |
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Changes (by simonmar):
* status: new => closed
* failure: => None/Unknown
* resolution: => fixed
Comment:
This was fixed by:
{{{
Thu Nov 5 15:15:32 GMT 2009 [email protected]
* Loop problems in native back ends, update to T3286 fix
The native back ends had difficulties with loops;
in particular the code for branch-chain elimination
could run in infinite loops or drop basic blocks.
The old codeGen didn't expose these problems.
Also, my fix for T3286 in the new codegen was getting
applied to too many (some wrong) cases; a better pattern
match fixed that.
}}}
--
Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/1500#comment:7>
GHC <http://www.haskell.org/ghc/>
The Glasgow Haskell Compiler
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