1 ; RUN: llc < %s -o - -mcpu=generic -mtriple=x86_64-apple-darwin -mattr=+sse2 | FileCheck %s 2 ; RUN: llc < %s -o - -mcpu=generic -mtriple=x86_64-apple-darwin -mattr=+sse4.2 | FileCheck %s 3 4 ; For a setult against a constant, turn it into a setule and lower via psubusw. 5 6 define void @loop_no_const_reload(<2 x i64>* %in, <2 x i64>* %out, i32 %n) { 7 ; CHECK: .short 25 8 ; CHECK-NEXT: .short 25 9 ; CHECK-NEXT: .short 25 10 ; CHECK-NEXT: .short 25 11 ; CHECK-NEXT: .short 25 12 ; CHECK-NEXT: .short 25 13 ; CHECK-NEXT: .short 25 14 ; CHECK-NEXT: .short 25 15 ; CHECK-LABEL: loop_no_const_reload: 16 ; CHECK: psubusw 17 18 ; Constant is no longer clobbered so no need to reload it in the loop. 19 20 ; CHECK-NOT: movdqa {{%xmm[0-9]+}}, {{%xmm[0-9]+}} 21 22 entry: 23 %cmp9 = icmp eq i32 %n, 0 24 br i1 %cmp9, label %for.end, label %for.body 25 26 for.body: ; preds = %for.body, %entry 27 %indvars.iv = phi i64 [ %indvars.iv.next, %for.body ], [ 0, %entry ] 28 %arrayidx1 = getelementptr inbounds <2 x i64>, <2 x i64>* %in, i64 %indvars.iv 29 %arrayidx1.val = load <2 x i64>, <2 x i64>* %arrayidx1, align 16 30 %0 = bitcast <2 x i64> %arrayidx1.val to <8 x i16> 31 %cmp.i.i = icmp ult <8 x i16> %0, <i16 26, i16 26, i16 26, i16 26, i16 26, i16 26, i16 26, i16 26> 32 %sext.i.i = sext <8 x i1> %cmp.i.i to <8 x i16> 33 %1 = bitcast <8 x i16> %sext.i.i to <2 x i64> 34 %arrayidx5 = getelementptr inbounds <2 x i64>, <2 x i64>* %out, i64 %indvars.iv 35 store <2 x i64> %1, <2 x i64>* %arrayidx5, align 16 36 %indvars.iv.next = add nuw nsw i64 %indvars.iv, 1 37 %lftr.wideiv = trunc i64 %indvars.iv.next to i32 38 %exitcond = icmp eq i32 %lftr.wideiv, %n 39 br i1 %exitcond, label %for.end, label %for.body 40 41 for.end: ; preds = %for.body, %entry 42 ret void 43 } 44 45 ; Be careful if decrementing the constant would undeflow. 46 47 define void @loop_const_folding_underflow(<2 x i64>* %in, <2 x i64>* %out, i32 %n) { 48 ; CHECK-NOT: .short 25 49 ; CHECK-LABEL: loop_const_folding_underflow: 50 ; CHECK-NOT: psubusw 51 entry: 52 %cmp9 = icmp eq i32 %n, 0 53 br i1 %cmp9, label %for.end, label %for.body 54 55 for.body: ; preds = %for.body, %entry 56 %indvars.iv = phi i64 [ %indvars.iv.next, %for.body ], [ 0, %entry ] 57 %arrayidx1 = getelementptr inbounds <2 x i64>, <2 x i64>* %in, i64 %indvars.iv 58 %arrayidx1.val = load <2 x i64>, <2 x i64>* %arrayidx1, align 16 59 %0 = bitcast <2 x i64> %arrayidx1.val to <8 x i16> 60 %cmp.i.i = icmp ult <8 x i16> %0, <i16 0, i16 26, i16 26, i16 26, i16 26, i16 26, i16 26, i16 26> 61 %sext.i.i = sext <8 x i1> %cmp.i.i to <8 x i16> 62 %1 = bitcast <8 x i16> %sext.i.i to <2 x i64> 63 %arrayidx5 = getelementptr inbounds <2 x i64>, <2 x i64>* %out, i64 %indvars.iv 64 store <2 x i64> %1, <2 x i64>* %arrayidx5, align 16 65 %indvars.iv.next = add nuw nsw i64 %indvars.iv, 1 66 %lftr.wideiv = trunc i64 %indvars.iv.next to i32 67 %exitcond = icmp eq i32 %lftr.wideiv, %n 68 br i1 %exitcond, label %for.end, label %for.body 69 70 for.end: ; preds = %for.body, %entry 71 ret void 72 } 73 74 ; Test for PSUBUSB 75 76 define <16 x i8> @test_ult_byte(<16 x i8> %a) { 77 ; CHECK: .space 16,10 78 ; CHECK-LABEL: test_ult_byte: 79 ; CHECK: psubus 80 entry: 81 %icmp = icmp ult <16 x i8> %a, <i8 11, i8 11, i8 11, i8 11, i8 11, i8 11, i8 11, i8 11, i8 11, i8 11, i8 11, i8 11, i8 11, i8 11, i8 11, i8 11> 82 %sext = sext <16 x i1> %icmp to <16 x i8> 83 ret <16 x i8> %sext 84 } 85 86 ; Only do this when we can turn the comparison into a setule. I.e. not for 87 ; register operands. 88 89 define <8 x i16> @test_ult_register(<8 x i16> %a, <8 x i16> %b) { 90 ; CHECK-LABEL: test_ult_register: 91 ; CHECK-NOT: psubus 92 entry: 93 %icmp = icmp ult <8 x i16> %a, %b 94 %sext = sext <8 x i1> %icmp to <8 x i16> 95 ret <8 x i16> %sext 96 } 97
