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| author | Sam Parker <sam.parker@arm.com> | 2018-08-16 12:24:40 +0000 |
|---|---|---|
| committer | Sam Parker <sam.parker@arm.com> | 2018-08-16 12:24:40 +0000 |
| commit | 0d51197051a6ca1f1bcd99b607bbd0956663d4ce (patch) | |
| tree | 4db023a0611de9d1ed33a1c81deec575ee995aee /llvm/lib | |
| parent | 7f2df7df4597772407307d44d8d02cc0f07e35c3 (diff) | |
| download | bcm5719-llvm-0d51197051a6ca1f1bcd99b607bbd0956663d4ce.tar.gz bcm5719-llvm-0d51197051a6ca1f1bcd99b607bbd0956663d4ce.zip | |
[ARM] Ignore GEPs in ARMCodeGenPrepare
While searching through the use-def tree, ignore GetElementPtrInst
instructions because they don't need promoting and neither do their
indices. Otherwise, the wide indices prevent the transformation from
happening.
Differential Revision: https://reviews.llvm.org/D50762
llvm-svn: 339871
Diffstat (limited to 'llvm/lib')
| -rw-r--r-- | llvm/lib/Target/ARM/ARMCodeGenPrepare.cpp | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/llvm/lib/Target/ARM/ARMCodeGenPrepare.cpp b/llvm/lib/Target/ARM/ARMCodeGenPrepare.cpp index 296a22fa45a..7601680134e 100644 --- a/llvm/lib/Target/ARM/ARMCodeGenPrepare.cpp +++ b/llvm/lib/Target/ARM/ARMCodeGenPrepare.cpp @@ -582,6 +582,11 @@ bool ARMCodeGenPrepare::TryToPromote(Value *V) { if (CurrentVisited.count(V)) return true; + // Ignore GEPs because they don't need promoting and the constant indices + // will prevent the transformation. + if (isa<GetElementPtrInst>(V)) + return true; + if (!isSupportedValue(V) || (shouldPromote(V) && !isLegalToPromote(V))) { LLVM_DEBUG(dbgs() << "ARM CGP: Can't handle: " << *V << "\n"); return false; |
