1 ; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py 2 ; RUN: llc -relocation-model=pic -march=x86-64 -mtriple=x86_64-unknown-unknown -mattr=+ssse3 < %s | FileCheck %s 3 ; RUN: llc -march=x86-64 -mtriple=x86_64-unknown-unknown -mattr=+ssse3 < %s | FileCheck %s 4 5 ; Verify that the backend correctly folds the shuffle in function 'fold_pshufb' 6 ; into a simple load from constant pool. 7 8 define <2 x i64> @fold_pshufb() { 9 ; CHECK-LABEL: fold_pshufb: 10 ; CHECK: # BB#0: # %entry 11 ; CHECK-NEXT: movaps {{.*#+}} xmm0 = [0,0,0,0,1,0,0,0,2,0,0,0,3,0,0,0] 12 ; CHECK-NEXT: retq 13 entry: 14 %0 = tail call <16 x i8> @llvm.x86.ssse3.pshuf.b.128(<16 x i8> <i8 0, i8 0, i8 0, i8 0, i8 1, i8 0, i8 0, i8 0, i8 2, i8 0, i8 0, i8 0, i8 3, i8 0, i8 0, i8 0>, <16 x i8> <i8 0, i8 1, i8 2, i8 3, i8 4, i8 5, i8 6, i8 7, i8 8, i8 9, i8 10, i8 11, i8 12, i8 13, i8 14, i8 15>) 15 %1 = bitcast <16 x i8> %0 to <2 x i64> 16 ret <2 x i64> %1 17 } 18 19 ; The pshufb from function @pr24562 was wrongly folded into its first operand 20 ; as a result of a late target shuffle combine on the legalized selection dag. 21 ; 22 ; Check that the pshufb is correctly folded to a zero vector. 23 24 define <2 x i64> @pr24562() { 25 ; CHECK-LABEL: pr24562: 26 ; CHECK: # BB#0: # %entry 27 ; CHECK-NEXT: xorps %xmm0, %xmm0 28 ; CHECK-NEXT: retq 29 entry: 30 %0 = call <16 x i8> @llvm.x86.ssse3.pshuf.b.128(<16 x i8> <i8 1, i8 1, i8 1, i8 1, i8 1, i8 1, i8 1, i8 1, i8 1, i8 1, i8 1, i8 1, i8 1, i8 1, i8 1, i8 1>, <16 x i8> <i8 -1, i8 -1, i8 -1, i8 -1, i8 -1, i8 -1, i8 -1, i8 -1, i8 -1, i8 -1, i8 -1, i8 -1, i8 -1, i8 -1, i8 -1, i8 -1>) #2 31 %1 = bitcast <16 x i8> %0 to <2 x i64> 32 ret <2 x i64> %1 33 } 34 35 declare <16 x i8> @llvm.x86.ssse3.pshuf.b.128(<16 x i8>, <16 x i8>) 36
