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| author | Bill Wendling <isanbard@gmail.com> | 2008-06-23 23:41:14 +0000 |
|---|---|---|
| committer | Bill Wendling <isanbard@gmail.com> | 2008-06-23 23:41:14 +0000 |
| commit | 09d556630a0042c7166fc50ca90a660eab280e21 (patch) | |
| tree | 00ea1623ef1d89a871a3d627a8387500a34e2c1c /test/CodeGen/PowerPC/2008-06-23-LiveVariablesCrash.ll | |
| parent | f02ae79c808c7be63992f2c5042af3bd1c5c6bf2 (diff) | |
| download | external_llvm-09d556630a0042c7166fc50ca90a660eab280e21.zip external_llvm-09d556630a0042c7166fc50ca90a660eab280e21.tar.gz external_llvm-09d556630a0042c7166fc50ca90a660eab280e21.tar.bz2 | |
This situation can occur:
,------.
| |
| v
| t2 = phi ... t1 ...
| |
| v
| t1 = ...
| ... = ... t1 ...
| |
`------'
where there is a use in a PHI node that's a predecessor to the defining
block. We don't want to mark all predecessors as having the value "alive" in
this case. Also, the assert was too restrictive and didn't handle this case.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@52655 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'test/CodeGen/PowerPC/2008-06-23-LiveVariablesCrash.ll')
| -rw-r--r-- | test/CodeGen/PowerPC/2008-06-23-LiveVariablesCrash.ll | 25 |
1 files changed, 25 insertions, 0 deletions
diff --git a/test/CodeGen/PowerPC/2008-06-23-LiveVariablesCrash.ll b/test/CodeGen/PowerPC/2008-06-23-LiveVariablesCrash.ll new file mode 100644 index 0000000..d3238d2 --- /dev/null +++ b/test/CodeGen/PowerPC/2008-06-23-LiveVariablesCrash.ll @@ -0,0 +1,25 @@ +; RUN: llvm-as < %s | llc -march=ppc32 +; <rdar://problem/6020042> + +define i32 @bork() nounwind { +entry: + br i1 true, label %bb1, label %bb3 + +bb1: + %tmp1 = load i8* null, align 1 + %tmp2 = icmp eq i8 %tmp1, 0 + br label %bb2 + +bb2: + %val1 = phi i32 [ 0, %bb1 ], [ %val2, %bb2 ] + %val2 = select i1 %tmp2, i32 -1, i32 %val1 + switch i32 %val2, label %bb2 [ + i32 -1, label %bb3 + i32 0, label %bb1 + i32 1, label %bb3 + i32 2, label %bb1 + ] + +bb3: + ret i32 -1 +} |