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Hi, It looks like PDT.getRootNode() returns NULL for: define fastcc void @c974001__lengthy_calculation. 1736(%struct.FRAME.c974001* nocapture %CHAIN.185) noreturn { entry: br label %bb bb: br label %bb } Isn't it a bug in PostDominatorTree? Please note that this crashes: opt -postdomtree -debug dom_crash.bc I think this should be reported as a bug, -Jakub On...

Jakub Staszak wrote: > Hi, > > It looks like PDT.getRootNode() returns NULL for: > > define fastcc void @c974001__lengthy_calculation. > 1736(%struct.FRAME.c974001* nocapture %CHAIN.185) noreturn { > entry: > br label %bb > > bb: > br label %bb > } > > > Isn't it a bug in PostDominatorTree? > > Please note that this crashes: > opt -postdomtree -debug dom_c...

...lists.llvm.org/pipermail/llvm-dev/attachments/20090908/e8d20e71/attachment.obj> -------------- next part -------------- On Sep 6, 2009, at 6:09 AM, Nick Lewycky wrote: > Jakub Staszak wrote: >> Hi, >> It looks like PDT.getRootNode() returns NULL for: >> define fastcc void @c974001__lengthy_calculation. >> 1736(%struct.FRAME.c974001* nocapture %CHAIN.185) noreturn { >> entry: >> br label %bb >> bb: >> br label %bb >> } >> Isn't it a bug in PostDominatorTree? >> Please note that this crashes: >> opt -postdomtree -...

Hi Jakub, interesting patch. I ran it over the Ada testsuite and this picked up some problems even without enabling dse-ssu. For example, "opt -inline -dse -domtree" crashes on the attached testcase. Ciao, Duncan. -------------- next part -------------- An embedded and charset-unspecified text was scrubbed... Name: dom_crash.ll URL:

Hello, This patch adds non-local DSE optimization. It uses Static Single Use representation. This is my first "big" patch, please be tolerant :-) Please note that optimization is disabled by default. -Jakub -------------- next part -------------- A non-text attachment was scrubbed... Name: dse_ssu.patch Type: application/octet-stream Size: 17352 bytes Desc: not available URL: