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llvm-mirror/test/Transforms/InstCombine/bitcast-vec-canon.ll
Eli Friedman e507c1afaa Canonicalize bitcasts between types like <1 x i64> and i64 to
insertelement/extractelement.

I'm not entirely sure this is precisely what we want to do: should we 
prefer bitcast(insertelement) or insertelement(bitcast)?  Similarly. should we 
prefer extractelement(bitcast) or bitcast(extractelement)?

llvm-svn: 76345
2009-07-18 23:06:53 +00:00

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429 B
LLVM

; RUN: llvm-as < %s | opt -instcombine | llvm-dis | grep element | count 4
define double @a(<1 x i64> %y) {
%c = bitcast <1 x i64> %y to double
ret double %c
}
define i64 @b(<1 x i64> %y) {
%c = bitcast <1 x i64> %y to i64
ret i64 %c
}
define <1 x i64> @c(double %y) {
%c = bitcast double %y to <1 x i64>
ret <1 x i64> %c
}
define <1 x i64> @d(i64 %y) {
%c = bitcast i64 %y to <1 x i64>
ret <1 x i64> %c
}