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| author | Chris Lattner <sabre@nondot.org> | 2005-01-17 06:25:59 +0000 |
|---|---|---|
| committer | Chris Lattner <sabre@nondot.org> | 2005-01-17 06:25:59 +0000 |
| commit | f60513f71d3e433491e2bfc51cf764de78b848f8 (patch) | |
| tree | 4a7a9b03f1e989f600158e1dea9d7ea7b5a6af67 /test/CodeGen/X86/2005-01-17-CycleInDAG.ll | |
| parent | a3fd1c569c939a110f083a07b9ccec5a30fbba43 (diff) | |
| download | llvm-f60513f71d3e433491e2bfc51cf764de78b848f8.tar.gz llvm-f60513f71d3e433491e2bfc51cf764de78b848f8.tar.bz2 llvm-f60513f71d3e433491e2bfc51cf764de78b848f8.tar.xz | |
New testcase for a problem that occurred in 132.ijpeg
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19630 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'test/CodeGen/X86/2005-01-17-CycleInDAG.ll')
| -rw-r--r-- | test/CodeGen/X86/2005-01-17-CycleInDAG.ll | 16 |
1 files changed, 16 insertions, 0 deletions
diff --git a/test/CodeGen/X86/2005-01-17-CycleInDAG.ll b/test/CodeGen/X86/2005-01-17-CycleInDAG.ll new file mode 100644 index 0000000000..fdfed6cf41 --- /dev/null +++ b/test/CodeGen/X86/2005-01-17-CycleInDAG.ll @@ -0,0 +1,16 @@ +; This testcase was distilled from 132.ijpeg. Bsaically we cannot fold the +; load into the sub instruction here as it induces a cycle in the dag, which +; is invalid code (there is no correct way to order the instruction). Check +; that we do not fold the load into the sub. + +; RUN: llvm-as < %s | llc -march=x86 -disable-pattern-isel=0 | not grep 'sub.*GLOBAL' + +%GLOBAL = external global int + +int %test(int* %P1, int* %P2, int* %P3) { + %L = load int* %GLOBAL + store int 12, int* %P2 + %Y = load int* %P3 + %Z = sub int %Y, %L + ret int %Z +} |