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* Reapply: [DebugInfo] Correctly handle salvaged casts and split fragments at ISelstozer2019-12-181-1/+1
| | | | | | | | This reverts commit 1f3dd83cc1f2b8f72b9d59e2b4221b12fb7f9a95, reapplying commit bb1b0bc4e57428ce364d3d6c075ff03cb8973462. The original commit failed on some builds seemingly due to the use of a bracketed constructor with an std::array, i.e. `std::array<> arr({...})`.
* Revert "[DebugInfo] Correctly handle salvaged casts and split fragments at ISel"stozer2019-12-181-1/+1
| | | | | | Reverted due to build failure on windows bots. This reverts commit bb1b0bc4e57428ce364d3d6c075ff03cb8973462.
* [DebugInfo] Correctly handle salvaged casts and split fragments at ISelstozer2019-12-181-1/+1
| | | | | | | | | | | | | | | Previously, LLVM had no functional way of performing casts inside of a DIExpression(), which made salvaging cast instructions other than Noop casts impossible. This patch enables the salvaging of casts by using the DW_OP_LLVM_convert operator for SExt and Trunc instructions. There is another issue which is exposed by this fix, in which fragment DIExpressions (which are preserved more readily by this patch) for values that must be split across registers in ISel trigger an assertion, as the 'split' fragments extend beyond the bounds of the fragment DIExpression causing an error. This patch also fixes this issue by checking the fragment status of DIExpressions which are to be split, and dropping fragments that are invalid.
* Revert r360902 "Resubmit: [Salvage] Change salvage debug info ..."Bob Haarman2019-05-211-1/+1
| | | | | | | | | | | This reverts commit rr360902. It caused an assertion failure in lib/IR/DebugInfoMetadata.cpp: Assertion `(OffsetInBits + SizeInBits <= FragmentSizeInBits) && "new fragment outside of original fragment"' failed. PR41931. llvm-svn: 361246
* Resubmit: [Salvage] Change salvage debug info implementation to use ↵Stephen Tozer2019-05-161-1/+1
| | | | | | | | | | | | | | | | | | DW_OP_LLVM_convert where needed Fixes issue: https://bugs.llvm.org/show_bug.cgi?id=40645 Previously, LLVM had no functional way of performing casts inside of a DIExpression(), which made salvaging cast instructions other than Noop casts impossible. With the recent addition of DW_OP_LLVM_convert this salvaging is now possible, and so can be used to fix the attached bug as well as any cases where SExt instruction results are lost in the debugging metadata. This patch introduces this fix by expanding the salvage debug info method to cover these cases using the new operator. Differential revision: https://reviews.llvm.org/D61184 llvm-svn: 360902
* Revert "Temporarily Revert "Add basic loop fusion pass.""Eric Christopher2019-04-171-0/+81
| | | | | | | | The reversion apparently deleted the test/Transforms directory. Will be re-reverting again. llvm-svn: 358552
* Temporarily Revert "Add basic loop fusion pass."Eric Christopher2019-04-171-81/+0
| | | | | | | | As it's causing some bot failures (and per request from kbarton). This reverts commit r358543/ab70da07286e618016e78247e4a24fcb84077fda. llvm-svn: 358546
* [InstCombine] Mark debug values as unavailable after DCE.Davide Italiano2019-03-041-0/+81
Fixes PR40838. llvm-svn: 355301
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