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author | Owen Anderson <resistor@mac.com> | 2009-11-08 22:36:55 +0000 |
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committer | Owen Anderson <resistor@mac.com> | 2009-11-08 22:36:55 +0000 |
commit | 57cf21e12d890dd0ac45c9369fb501bbef3a0050 (patch) | |
tree | fc8276a97eae216bcae1de69c5313a77cdac7c3f /lib/Transforms/Scalar/ABCD.cpp | |
parent | 6235a52b83705e463a0ba08e28d8a288ac462b43 (diff) | |
download | external_llvm-57cf21e12d890dd0ac45c9369fb501bbef3a0050.tar.gz external_llvm-57cf21e12d890dd0ac45c9369fb501bbef3a0050.tar.bz2 external_llvm-57cf21e12d890dd0ac45c9369fb501bbef3a0050.zip |
Fix an issue where the ordering of blocks within a function could lead to different constraint
graphs being produced. The cause was that we were incorrectly marking sigma instructions as
processed after handling the sigma-specific constraints for them, potentially neglecting to
process them as normal instructions as well.
Unfortunately, the testcase that inspired this still doesn't work because of a bug in the solver,
which is next on the list to debug.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@86486 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib/Transforms/Scalar/ABCD.cpp')
-rw-r--r-- | lib/Transforms/Scalar/ABCD.cpp | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/lib/Transforms/Scalar/ABCD.cpp b/lib/Transforms/Scalar/ABCD.cpp index c8541d72a4..cc4683a52a 100644 --- a/lib/Transforms/Scalar/ABCD.cpp +++ b/lib/Transforms/Scalar/ABCD.cpp @@ -796,13 +796,15 @@ void ABCD::createConstraintSigInst(Instruction *I_op, BasicBlock *BB_succ_t, int32_t width = cast<IntegerType>((*SIG_op_t)->getType())->getBitWidth(); inequality_graph.addEdge(I_op, *SIG_op_t, APInt(width, 0), true); inequality_graph.addEdge(*SIG_op_t, I_op, APInt(width, 0), false); - created.insert(*SIG_op_t); + if (created.insert(*SIG_op_t)) + createConstraintPHINode(cast<PHINode>(*SIG_op_t)); } if (*SIG_op_f) { int32_t width = cast<IntegerType>((*SIG_op_f)->getType())->getBitWidth(); inequality_graph.addEdge(I_op, *SIG_op_f, APInt(width, 0), true); inequality_graph.addEdge(*SIG_op_f, I_op, APInt(width, 0), false); - created.insert(*SIG_op_f); + if (created.insert(*SIG_op_f)) + createConstraintPHINode(cast<PHINode>(*SIG_op_f)); } } |