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1; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py2; RUN: llc < %s -mtriple=x86_64-unknown-unknown -mattr=-sse4.1 | FileCheck %s --check-prefix=NO_SSE_413; RUN: llc < %s -mtriple=x86_64-unknown-unknown -mattr=+sse4.1 | FileCheck %s --check-prefix=SSE_414 5; PR20472 ( http://llvm.org/bugs/show_bug.cgi?id=20472 )6; When sexting a trunc'd vector value, we can't eliminate the zext.7; If we don't have SSE4.1, use punpck.8; If we have SSE4.1, use pmovzx because it combines the load op.9; There may be a better way to do this using pshufb + pmovsx,10; but that is beyond our current codegen capabilities.11 12define <4 x i32> @trunc_sext(ptr %in) {13; NO_SSE_41-LABEL: trunc_sext:14; NO_SSE_41: # %bb.0:15; NO_SSE_41-NEXT: movq {{.*#+}} xmm0 = mem[0],zero16; NO_SSE_41-NEXT: punpcklwd {{.*#+}} xmm0 = xmm0[0,0,1,1,2,2,3,3]17; NO_SSE_41-NEXT: pslld $24, %xmm018; NO_SSE_41-NEXT: psrad $24, %xmm019; NO_SSE_41-NEXT: retq20;21; SSE_41-LABEL: trunc_sext:22; SSE_41: # %bb.0:23; SSE_41-NEXT: pmovzxwd {{.*#+}} xmm0 = mem[0],zero,mem[1],zero,mem[2],zero,mem[3],zero24; SSE_41-NEXT: pslld $24, %xmm025; SSE_41-NEXT: psrad $24, %xmm026; SSE_41-NEXT: retq27 %load = load <4 x i16>, ptr %in28 %trunc = trunc <4 x i16> %load to <4 x i8>29 %sext = sext <4 x i8> %trunc to <4 x i32>30 ret <4 x i32> %sext31}32 33