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Diffstat (limited to 'test/Transforms/Reassociate/2002-05-15-SubReassociate2.ll')
| -rw-r--r-- | test/Transforms/Reassociate/2002-05-15-SubReassociate2.ll | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/test/Transforms/Reassociate/2002-05-15-SubReassociate2.ll b/test/Transforms/Reassociate/2002-05-15-SubReassociate2.ll new file mode 100644 index 000000000000..070080acf24f --- /dev/null +++ b/test/Transforms/Reassociate/2002-05-15-SubReassociate2.ll @@ -0,0 +1,13 @@ +; With sub reassociation, constant folding can eliminate the two 12 constants. +; +; RUN: llvm-as < %s | opt -reassociate -constprop -dce | llvm-dis | not grep 12 + +define i32 @test(i32 %A, i32 %B, i32 %C, i32 %D) { + %M = add i32 %A, 12 ; <i32> [#uses=1] + %N = add i32 %M, %B ; <i32> [#uses=1] + %O = add i32 %N, %C ; <i32> [#uses=1] + %P = sub i32 %D, %O ; <i32> [#uses=1] + %Q = add i32 %P, 12 ; <i32> [#uses=1] + ret i32 %Q +} + |