en Copyright 2015 Java http://172.16.0.5:8080/history/llvm-project-15.0.7/llvm/test/Transforms/InstCombine/catchswitch-phi.ll#ac4006b0 [InstCombine] Don't slice up PHIs when pred BB has catchswitchIf an integer PHI has an illegal type (according to the data layout) andit is only used by `trunc` or `trunc(lshr)` operations, we split the PHIinto various instructions in its predecessors:https://github.com/llvm/llvm-project/blob/6d1543a16797fa07eecea7e542df5b42422fc721/llvm/lib/Transforms/InstCombine/InstCombinePHI.cpp#L1536-L1543So this can produce code like the following:Before:```pred: ...bb: %p = phi i8 [ %somevalue, %pred ], ... ... %tobool = trunc i8 %p to i1 use %tobool ...```In this code, `%p` has an illegal integer type, `i8`, and its only usedin a `trunc` instruction later. In this case this pass puts extractioncode in its predecessors:After:```pred: ... %t = and i8 %somevalue, 1 %extract = icmp ne i8 %t, 0bb: %p.new = phi i1 [ %extract, %pred ], ... use %p.new instead of %tobool```But this doesn't work if `pred` is a `catchswitch` BB because it cannothave any non-PHI instructions. This CL ensures we bail out in that case.Fixes https://github.com/llvm/llvm-project/issues/55803.Reviewed By: dschuffDifferential Revision: https://reviews.llvm.org/D127699 List of files: /llvm-project-15.0.7/llvm/test/Transforms/InstCombine/catchswitch-phi.ll Sat, 11 Jun 2022 04:51:16 +0000 Heejin Ahn <aheejin@gmail.com> http://172.16.0.5:8080/history/llvm-project-15.0.7/llvm/test/Transforms/InstCombine/catchswitch-phi.ll#952e0693 [NFC] remove 'br undef' from InstCombine test casesThis is UB and allows the compiler to give any result, so these tests weren't meaningfulInstCombine tests are now clean of 'br undef' List of files: /llvm-project-15.0.7/llvm/test/Transforms/InstCombine/catchswitch-phi.ll Fri, 10 Jun 2022 14:28:57 +0000 Nuno Lopes <nuno.lopes@tecnico.ulisboa.pt> http://172.16.0.5:8080/history/llvm-project-15.0.7/llvm/test/Transforms/InstCombine/catchswitch-phi.ll#acdc419c [test] Use -passes=instcombine instead of -instcombine in lots of tests. NFCAnother step moving away from the deprecated syntax of specifyingpass pipeline in opt.Differential Revision: https://reviews.llvm.org/D119081 List of files: /llvm-project-15.0.7/llvm/test/Transforms/InstCombine/catchswitch-phi.ll Fri, 04 Feb 2022 12:39:52 +0000 Bjorn Pettersson <bjorn.a.pettersson@ericsson.com> http://172.16.0.5:8080/history/llvm-project-15.0.7/llvm/test/Transforms/InstCombine/catchswitch-phi.ll#51fecd17 [InstCombine] Don't combine PHI before catchswitchThis tries to bail out if the PHI is in a `catchswitch` BB inInstCombine. A PHI cannot be combined into a non-PHI instruction if itis in a `catchswitch` BB, because `catchswitch` BB cannot have anynon-PHI instruction other than `catchswitch` itself.The given test case started crashing after D98058.Reviewed By: lebedev.ri, rnkDifferential Revision: https://reviews.llvm.org/D105309 List of files: /llvm-project-15.0.7/llvm/test/Transforms/InstCombine/catchswitch-phi.ll Thu, 01 Jul 2021 19:22:41 +0000 Heejin Ahn <aheejin@gmail.com>