1 ; RUN: llc < %s -march=x86 -fixup-byte-word-insts=0 | FileCheck %s -check-prefix=CHECK -check-prefix=BWOFF 2 ; RUN: llc < %s -march=x86 -fixup-byte-word-insts=1 | FileCheck %s -check-prefix=CHECK -check-prefix=BWON 3 ; These transforms are turned off for load volatiles and stores. 4 ; Check that they weren't turned off for all loads and stores! 5 ; CHECK-LABEL: f: 6 ; CHECK-NOT: movsd 7 ; BWOFF: movw 8 ; BWON: movzwl 9 ; CHECK: addw 10 11 @atomic = global double 0.000000e+00 ; <double*> [#uses=1] 12 @atomic2 = global double 0.000000e+00 ; <double*> [#uses=1] 13 @ioport = global i32 0 ; <i32*> [#uses=1] 14 @ioport2 = global i32 0 ; <i32*> [#uses=1] 15 16 define i16 @f(i64 %x) { 17 %b = bitcast i64 %x to double ; <double> [#uses=1] 18 store double %b, double* @atomic 19 store double 0.000000e+00, double* @atomic2 20 %l = load i32, i32* @ioport ; <i32> [#uses=1] 21 %t = trunc i32 %l to i16 ; <i16> [#uses=1] 22 %l2 = load i32, i32* @ioport2 ; <i32> [#uses=1] 23 %tmp = lshr i32 %l2, 16 ; <i32> [#uses=1] 24 %t2 = trunc i32 %tmp to i16 ; <i16> [#uses=1] 25 %f = add i16 %t, %t2 ; <i16> [#uses=1] 26 ret i16 %f 27 } 28
