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50f25115cd
have complex pointer manipulation going on. This allows us to compile
stuff like this:
__m128i foo(__m128i x){
static const unsigned int c_0[4] = { 0, 0, 0, 0 };
__m128i v_Zero = _mm_loadu_si128((__m128i*)c_0);
x = _mm_unpacklo_epi8(x, v_Zero);
return x;
}
into:
_foo:
xorps %xmm1, %xmm1
punpcklbw %xmm1, %xmm0
ret
llvm-svn: 41022
12 lines
259 B
LLVM
12 lines
259 B
LLVM
; RUN: llvm-as < %s | opt -instcombine | llvm-dis | not grep load
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@GLOBAL = internal constant [4 x i32] zeroinitializer
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define <16 x i8> @foo(<2 x i64> %x) {
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entry:
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%tmp = load <16 x i8> * bitcast ([4 x i32]* @GLOBAL to <16 x i8>*)
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ret <16 x i8> %tmp
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}
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