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| author | Shuxin Yang <shuxin.llvm@gmail.com> | 2013-01-10 23:32:01 +0000 |
|---|---|---|
| committer | Shuxin Yang <shuxin.llvm@gmail.com> | 2013-01-10 23:32:01 +0000 |
| commit | 253449db20f86b655852a397245ba16ff262452f (patch) | |
| tree | 19a6a9e95b5f8fe231cffccba48b5c115492a6ca /test/Transforms/LoopIdiom | |
| parent | 582e4f278b95d50a45c6f56e33da5e78c19afc17 (diff) | |
| download | external_llvm-253449db20f86b655852a397245ba16ff262452f.zip external_llvm-253449db20f86b655852a397245ba16ff262452f.tar.gz external_llvm-253449db20f86b655852a397245ba16ff262452f.tar.bz2 | |
PR14904: Segmentation fault running pass 'Recognize loop idioms'
The root cause is mistakenly taking for granted that
"dyn_cast<Instruction>(a-Value)"
return a non-NULL instruction.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@172145 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'test/Transforms/LoopIdiom')
| -rw-r--r-- | test/Transforms/LoopIdiom/X86/popcnt.ll | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/test/Transforms/LoopIdiom/X86/popcnt.ll b/test/Transforms/LoopIdiom/X86/popcnt.ll index 2f458fb..25df93d 100644 --- a/test/Transforms/LoopIdiom/X86/popcnt.ll +++ b/test/Transforms/LoopIdiom/X86/popcnt.ll @@ -118,3 +118,23 @@ while.end: ; preds = %while.body, %entry %c.0.lcssa = phi i32 [ 0, %entry ], [ %inc, %while.body ] ret i32 %c.0.lcssa } + +define i32 @PopCntCrash3(i64 %a, i32 %x) { +entry: + %tobool3 = icmp eq i64 %a, 0 + %cmp = icmp eq i32 %x, 0 + br i1 %tobool3, label %while.end, label %while.body + +while.body: ; preds = %entry, %while.body + %c.05 = phi i32 [ %inc, %while.body ], [ 0, %entry ] + %a.addr.04 = phi i64 [ %and, %while.body ], [ %a, %entry ] + %inc = add nsw i32 %c.05, 1 + %sub = add i64 %a.addr.04, -1 + %and = and i64 %sub, %a.addr.04 + %tobool = icmp eq i64 %and, 0 + br i1 %cmp, label %while.end, label %while.body + +while.end: ; preds = %while.body, %entry + %c.0.lcssa = phi i32 [ 0, %entry ], [ %inc, %while.body ] + ret i32 %c.0.lcssa +} |