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| author | Matthias Braun <matze@braunis.de> | 2017-08-23 03:17:59 +0000 |
|---|---|---|
| committer | Matthias Braun <matze@braunis.de> | 2017-08-23 03:17:59 +0000 |
| commit | 8426d1342d82b365f4997c3d222c349fe7fba2ac (patch) | |
| tree | 97ebae8104e0c0a140bc498aa1e61a6631db5b6a /llvm/lib/CodeGen/TailDuplication.cpp | |
| parent | 498117bf11d8e7be5770f5f16da398a5e372c4be (diff) | |
| download | llvm-8426d1342d82b365f4997c3d222c349fe7fba2ac.zip llvm-8426d1342d82b365f4997c3d222c349fe7fba2ac.tar.gz llvm-8426d1342d82b365f4997c3d222c349fe7fba2ac.tar.bz2 | |
Add test case for r311511
This also changes the TailDuplicator to be configured explicitely
pre/post regalloc rather than relying on the isSSA() flag. This was
necessary to have `llc -run-pass` work reliably.
llvm-svn: 311520
Diffstat (limited to 'llvm/lib/CodeGen/TailDuplication.cpp')
| -rw-r--r-- | llvm/lib/CodeGen/TailDuplication.cpp | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/llvm/lib/CodeGen/TailDuplication.cpp b/llvm/lib/CodeGen/TailDuplication.cpp index 489a607..131b9a2 100644 --- a/llvm/lib/CodeGen/TailDuplication.cpp +++ b/llvm/lib/CodeGen/TailDuplication.cpp @@ -52,7 +52,10 @@ bool TailDuplicatePass::runOnMachineFunction(MachineFunction &MF) { auto MBPI = &getAnalysis<MachineBranchProbabilityInfo>(); - Duplicator.initMF(MF, MBPI, /* LayoutMode */ false); + // TODO: Querying isSSA() to determine pre-/post-regalloc is fragile, better + // split this into two passes instead. + bool PreRegAlloc = MF.getRegInfo().isSSA(); + Duplicator.initMF(MF, PreRegAlloc, MBPI, /* LayoutMode */ false); bool MadeChange = false; while (Duplicator.tailDuplicateBlocks()) |