37 lines
1.5 KiB
LLVM
37 lines
1.5 KiB
LLVM
|
; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
|
||
|
|
; RUN: llc < %s -mtriple=i686-linux -mattr=+sse2 | FileCheck %s
|
||
|
|
|
||
|
|
@atomic = global double 0.000000e+00 ; <double*> [#uses=1]
|
||
|
|
@atomic2 = global double 0.000000e+00 ; <double*> [#uses=1]
|
||
|
|
@anything = global i64 0 ; <i64*> [#uses=1]
|
||
|
|
@ioport = global i32 0 ; <i32*> [#uses=2]
|
||
|
|
|
||
|
|
define i16 @f(i64 %x, double %y) {
|
||
|
|
; CHECK-LABEL: f:
|
||
|
|
; CHECK: # %bb.0:
|
||
|
|
; CHECK-NEXT: movsd {{.*#+}} xmm0 = mem[0],zero
|
||
|
|
; CHECK-NEXT: movsd {{.*#+}} xmm1 = mem[0],zero
|
||
|
|
; CHECK-NEXT: movsd %xmm1, atomic
|
||
|
|
; CHECK-NEXT: xorps %xmm1, %xmm1
|
||
|
|
; CHECK-NEXT: movsd %xmm1, atomic2
|
||
|
|
; CHECK-NEXT: movsd %xmm0, anything
|
||
|
|
; CHECK-NEXT: movl ioport, %ecx
|
||
|
|
; CHECK-NEXT: movl ioport, %eax
|
||
|
|
; CHECK-NEXT: shrl $16, %eax
|
||
|
|
; CHECK-NEXT: addl %ecx, %eax
|
||
|
|
; CHECK-NEXT: # kill: def $ax killed $ax killed $eax
|
||
|
|
; CHECK-NEXT: retl
|
||
|
|
%b = bitcast i64 %x to double ; <double> [#uses=1]
|
||
|
|
store volatile double %b, double* @atomic ; one processor operation only
|
||
|
|
store volatile double 0.000000e+00, double* @atomic2 ; one processor operation only
|
||
|
|
%b2 = bitcast double %y to i64 ; <i64> [#uses=1]
|
||
|
|
store volatile i64 %b2, i64* @anything ; may transform to store of double
|
||
|
|
%l = load volatile i32, i32* @ioport ; must not narrow
|
||
|
|
%t = trunc i32 %l to i16 ; <i16> [#uses=1]
|
||
|
|
%l2 = load volatile i32, i32* @ioport ; must not narrow
|
||
|
|
%tmp = lshr i32 %l2, 16 ; <i32> [#uses=1]
|
||
|
|
%t2 = trunc i32 %tmp to i16 ; <i16> [#uses=1]
|
||
|
|
%f = add i16 %t, %t2 ; <i16> [#uses=1]
|
||
|
|
ret i16 %f
|
||
|
|
}
|