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23 lines
1006 B
LLVM
23 lines
1006 B
LLVM
; RUN: llc < %s -march=x86 -mattr=+sse2 | grep movsd | count 5
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; RUN: llc < %s -march=x86 -mattr=+sse2 | grep movl | count 2
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@atomic = global double 0.000000e+00 ; <double*> [#uses=1]
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@atomic2 = global double 0.000000e+00 ; <double*> [#uses=1]
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@anything = global i64 0 ; <i64*> [#uses=1]
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@ioport = global i32 0 ; <i32*> [#uses=2]
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define i16 @f(i64 %x, double %y) {
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%b = bitcast i64 %x to double ; <double> [#uses=1]
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volatile store double %b, double* @atomic ; one processor operation only
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volatile store double 0.000000e+00, double* @atomic2 ; one processor operation only
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%b2 = bitcast double %y to i64 ; <i64> [#uses=1]
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volatile store i64 %b2, i64* @anything ; may transform to store of double
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%l = volatile load i32* @ioport ; must not narrow
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%t = trunc i32 %l to i16 ; <i16> [#uses=1]
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%l2 = volatile load i32* @ioport ; must not narrow
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%tmp = lshr i32 %l2, 16 ; <i32> [#uses=1]
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%t2 = trunc i32 %tmp to i16 ; <i16> [#uses=1]
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%f = add i16 %t, %t2 ; <i16> [#uses=1]
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ret i16 %f
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}
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