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| author | Owen Anderson <resistor@mac.com> | 2010-08-27 17:12:29 +0000 |
|---|---|---|
| committer | Owen Anderson <resistor@mac.com> | 2010-08-27 17:12:29 +0000 |
| commit | 660cab32fe5105bcaa17daa4704c24065ac0a7e6 (patch) | |
| tree | 0fb70ca06ea4d8d01b26f861c227238e53ebbd64 /lib/Analysis/LazyValueInfo.cpp | |
| parent | 67ef74e0e5863e32e4d581d5e197bf00cccddd01 (diff) | |
| download | llvm-660cab32fe5105bcaa17daa4704c24065ac0a7e6.tar.gz llvm-660cab32fe5105bcaa17daa4704c24065ac0a7e6.tar.bz2 llvm-660cab32fe5105bcaa17daa4704c24065ac0a7e6.tar.xz | |
Use LVI to eliminate conditional branches where we've tested a related condition previously. Update tests for this change.
This fixes PR5652.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@112270 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib/Analysis/LazyValueInfo.cpp')
| -rw-r--r-- | lib/Analysis/LazyValueInfo.cpp | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/lib/Analysis/LazyValueInfo.cpp b/lib/Analysis/LazyValueInfo.cpp index 31ca2de283..7e00f143c6 100644 --- a/lib/Analysis/LazyValueInfo.cpp +++ b/lib/Analysis/LazyValueInfo.cpp @@ -656,7 +656,8 @@ LVILatticeVal LVIQuery::getEdgeValue(BasicBlock *BBFrom, BasicBlock *BBTo) { // Figure out the possible values of the query BEFORE this branch. LVILatticeVal InBlock = getBlockValue(BBFrom); - if (!InBlock.isConstantRange()) return InBlock; + if (!InBlock.isConstantRange()) + return LVILatticeVal::getRange(TrueValues); // Find all potential values that satisfy both the input and output // conditions. |