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add an example

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@26709 91177308-0d34-0410-b5e6-96231b3b80d8
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Chris Lattner 2006-03-11 20:20:40 +00:00
parent c20995e070
commit 74cfb7d7b3
1 changed files with 11 additions and 0 deletions
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11
lib/Target/README.txt
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@ -121,6 +121,17 @@ Reassociate should turn: X*X*X*X -> t=(X*X) (t*t) to eliminate a multiply.
//===---------------------------------------------------------------------===//
Interesting? testcase for add/shift/mul reassoc:
int bar(int x, int y) {
return x*x*x+y+x*x*x*x*x*y*y*y*y;
}
int foo(int z, int n) {
return bar(z, n) + bar(2*z, 2*n);
}
//===---------------------------------------------------------------------===//
These two functions should generate the same code on big-endian systems:
int g(int *j,int *l) { return memcmp(j,l,4); }