37 lines
1.5 KiB
LLVM
37 lines
1.5 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
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; RUN: llc < %s -mtriple=i686-linux -mattr=+sse2 | FileCheck %s
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@atomic = global double 0.000000e+00 ; <ptr> [#uses=1]
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@atomic2 = global double 0.000000e+00 ; <ptr> [#uses=1]
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@anything = global i64 0 ; <ptr> [#uses=1]
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@ioport = global i32 0 ; <ptr> [#uses=2]
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define i16 @f(i64 %x, double %y) {
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; CHECK-LABEL: f:
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; CHECK: # %bb.0:
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; CHECK-NEXT: movsd {{.*#+}} xmm0 = mem[0],zero
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; CHECK-NEXT: movsd {{.*#+}} xmm1 = mem[0],zero
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; CHECK-NEXT: movsd %xmm1, atomic
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; CHECK-NEXT: xorps %xmm1, %xmm1
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; CHECK-NEXT: movsd %xmm1, atomic2
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; CHECK-NEXT: movsd %xmm0, anything
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; CHECK-NEXT: movl ioport, %ecx
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; CHECK-NEXT: movl ioport, %eax
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; CHECK-NEXT: shrl $16, %eax
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; CHECK-NEXT: addl %ecx, %eax
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; CHECK-NEXT: # kill: def $ax killed $ax killed $eax
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; CHECK-NEXT: retl
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%b = bitcast i64 %x to double ; <double> [#uses=1]
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store volatile double %b, ptr @atomic ; one processor operation only
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store volatile double 0.000000e+00, ptr @atomic2 ; one processor operation only
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%b2 = bitcast double %y to i64 ; <i64> [#uses=1]
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store volatile i64 %b2, ptr @anything ; may transform to store of double
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%l = load volatile i32, ptr @ioport ; must not narrow
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%t = trunc i32 %l to i16 ; <i16> [#uses=1]
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%l2 = load volatile i32, ptr @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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