| Dan Gohman | 0a06310 | 2009-09-08 23:54:48 +0000 | [diff] [blame] | 1 | ; RUN: llc < %s -march=x86 -mattr=+sse2 | grep movsd | count 5 |
| 2 | ; RUN: llc < %s -march=x86 -mattr=+sse2 | grep movl | count 2 |
| Duncan Sands | 2418bec | 2008-06-13 19:07:40 +0000 | [diff] [blame] | 3 | |
| 4 | @atomic = global double 0.000000e+00 ; <double*> [#uses=1] |
| 5 | @atomic2 = global double 0.000000e+00 ; <double*> [#uses=1] |
| 6 | @anything = global i64 0 ; <i64*> [#uses=1] |
| 7 | @ioport = global i32 0 ; <i32*> [#uses=2] |
| 8 | |
| 9 | define i16 @f(i64 %x, double %y) { |
| 10 | %b = bitcast i64 %x to double ; <double> [#uses=1] |
| 11 | volatile store double %b, double* @atomic ; one processor operation only |
| 12 | volatile store double 0.000000e+00, double* @atomic2 ; one processor operation only |
| 13 | %b2 = bitcast double %y to i64 ; <i64> [#uses=1] |
| 14 | volatile store i64 %b2, i64* @anything ; may transform to store of double |
| 15 | %l = volatile load i32* @ioport ; must not narrow |
| 16 | %t = trunc i32 %l to i16 ; <i16> [#uses=1] |
| 17 | %l2 = volatile load i32* @ioport ; must not narrow |
| 18 | %tmp = lshr i32 %l2, 16 ; <i32> [#uses=1] |
| 19 | %t2 = trunc i32 %tmp to i16 ; <i16> [#uses=1] |
| 20 | %f = add i16 %t, %t2 ; <i16> [#uses=1] |
| 21 | ret i16 %f |
| 22 | } |