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| -rw-r--r-- | test/Transforms/Reassociate/negation.ll | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/test/Transforms/Reassociate/negation.ll b/test/Transforms/Reassociate/negation.ll new file mode 100644 index 0000000000..ba7fe6fbeb --- /dev/null +++ b/test/Transforms/Reassociate/negation.ll @@ -0,0 +1,20 @@ +; RUN: llvm-as < %s | opt -reassociate -instcombine | llvm-dis | not grep sub + +; Test that we can turn things like X*-(Y*Z) -> X*-1*Y*Z. + +int %test1(int %a, int %b, int %z) { + %c = sub int 0, %z + %d = mul int %a, %b + %e = mul int %c, %d + %f = mul int %e, 12345 + %g = sub int 0, %f + ret int %g +} + +int %test2(int %a, int %b, int %z) { + %d = mul int %z, 40 + %c = sub int 0, %d + %e = mul int %a, %c + %f = sub int 0, %e + ret int %f +} |