llvm-6502/test/Transforms/InstCombine/bitcast-vec-canon.ll
Eli Friedman 2451a64687 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)?



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@76345 91177308-0d34-0410-b5e6-96231b3b80d8
2009-07-18 23:06:53 +00:00

23 lines
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
}