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Add a memset loop that LoopIdiomRecognize doesn't recognize.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@124082 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Anders Carlsson 2011-01-23 20:31:00 +00:00
parent 76167af9b1
commit f330b3227a
1 changed files with 8 additions and 0 deletions
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8
lib/Target/README.txt
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@ -289,6 +289,14 @@ unsigned int popcount(unsigned int input) {
This sort of thing should be added to the loop idiom pass.
This loop isn't converted to a memset:
void f(char *dest, int n) {
for (int i = 0; i < n; ++i) {
dest[n] = 0;
}
}
//===---------------------------------------------------------------------===//
These should turn into single 16-bit (unaligned?) loads on little/big endian