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| author | Nick Lewycky <nicholas@mxc.ca> | 2008-02-18 22:48:05 +0000 |
|---|---|---|
| committer | Nick Lewycky <nicholas@mxc.ca> | 2008-02-18 22:48:05 +0000 |
| commit | fefd0202c9e5f5a3b12d713d321fe9844ab79b7c (patch) | |
| tree | 70f7edc63f331a91d84cc9694c1379e68cdd53c3 /llvm/test/Transforms/InstCombine/2008-02-16-SDivOverflow.ll | |
| parent | dec89733a77205f7d2c69ce12ea30e4aa3acfcee (diff) | |
| download | bcm5719-llvm-fefd0202c9e5f5a3b12d713d321fe9844ab79b7c.tar.gz bcm5719-llvm-fefd0202c9e5f5a3b12d713d321fe9844ab79b7c.zip | |
Correctly fold divide-by-constant, even when faced with overflow.
llvm-svn: 47287
Diffstat (limited to 'llvm/test/Transforms/InstCombine/2008-02-16-SDivOverflow.ll')
| -rw-r--r-- | llvm/test/Transforms/InstCombine/2008-02-16-SDivOverflow.ll | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/llvm/test/Transforms/InstCombine/2008-02-16-SDivOverflow.ll b/llvm/test/Transforms/InstCombine/2008-02-16-SDivOverflow.ll new file mode 100644 index 00000000000..cd61a10c5b8 --- /dev/null +++ b/llvm/test/Transforms/InstCombine/2008-02-16-SDivOverflow.ll @@ -0,0 +1,14 @@ +; RUN: llvm-as < %s | opt -instcombine | llvm-dis | grep {ret i.* 0} | count 2 +; PR2048 + +define i32 @i(i32 %a) { + %tmp1 = sdiv i32 %a, -1431655765 + %tmp2 = sdiv i32 %tmp1, 3 + ret i32 %tmp2 +} + +define i8 @j(i8 %a) { + %tmp1 = sdiv i8 %a, 64 + %tmp2 = sdiv i8 %tmp1, 3 + ret i8 %tmp2 +} |
