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* Revert "[AMDGPU] Invert the handling of skip insertion."Nicolai Hähnle2020-02-031-3/+4
| | | | | | | | | This reverts commit 0dc6c249bffac9f23a605ce4e42a84341da3ddbd. The commit is reported to cause a regression in piglit/bin/glsl-vs-loop for Mesa. (cherry picked from commit a80291ce10ba9667352adcc895f9668144f5f616)
* [AMDGPU] Invert the handling of skip insertion.cdevadas2020-01-151-4/+3
| | | | | | | | | | | | | | | The current implementation of skip insertion (SIInsertSkip) makes it a mandatory pass required for correctness. Initially, the idea was to have an optional pass. This patch inserts the s_cbranch_execz upfront during SILowerControlFlow to skip over the sections of code when no lanes are active. Later, SIRemoveShortExecBranches removes the skips for short branches, unless there is a sideeffect and the skip branch is really necessary. This new pass will replace the handling of skip insertion in the existing SIInsertSkip Pass. Differential revision: https://reviews.llvm.org/D68092
* AMDGPU: Force skips around trapsMatt Arsenault2019-06-071-0/+58
llvm-svn: 362852
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