1; Test 64-bit equality comparisons that are really between a memory halfword 2; and a constant. 3; 4; RUN: llc < %s -mtriple=s390x-linux-gnu | FileCheck %s 5 6; Check the low end of the 16-bit unsigned range, with zero extension. 7define double @f1(double %a, double %b, i16 *%ptr) { 8; CHECK-LABEL: f1: 9; CHECK: clhhsi 0(%r2), 0 10; CHECK-NEXT: ber %r14 11; CHECK: br %r14 12 %val = load i16, i16 *%ptr 13 %ext = zext i16 %val to i64 14 %cond = icmp eq i64 %ext, 0 15 %res = select i1 %cond, double %a, double %b 16 ret double %res 17} 18 19; Check the high end of the 16-bit unsigned range, with zero extension. 20define double @f2(double %a, double %b, i16 *%ptr) { 21; CHECK-LABEL: f2: 22; CHECK: clhhsi 0(%r2), 65535 23; CHECK-NEXT: ber %r14 24; CHECK: br %r14 25 %val = load i16, i16 *%ptr 26 %ext = zext i16 %val to i64 27 %cond = icmp eq i64 %ext, 65535 28 %res = select i1 %cond, double %a, double %b 29 ret double %res 30} 31 32; Check the next value up, with zero extension. The condition is always false. 33define double @f3(double %a, double %b, i16 *%ptr) { 34; CHECK-LABEL: f3: 35; CHECK-NOT: clhhsi 36; CHECK: br %r14 37 %val = load i16, i16 *%ptr 38 %ext = zext i16 %val to i64 39 %cond = icmp eq i64 %ext, 65536 40 %res = select i1 %cond, double %a, double %b 41 ret double %res 42} 43 44; Check comparisons with -1, with zero extension. 45; This condition is also always false. 46define double @f4(double %a, double %b, i16 *%ptr) { 47; CHECK-LABEL: f4: 48; CHECK-NOT: clhhsi 49; CHECK: br %r14 50 %val = load i16, i16 *%ptr 51 %ext = zext i16 %val to i64 52 %cond = icmp eq i64 %ext, -1 53 %res = select i1 %cond, double %a, double %b 54 ret double %res 55} 56 57; Check comparisons with 0, using sign extension. 58define double @f5(double %a, double %b, i16 *%ptr) { 59; CHECK-LABEL: f5: 60; CHECK: clhhsi 0(%r2), 0 61; CHECK-NEXT: ber %r14 62; CHECK: br %r14 63 %val = load i16, i16 *%ptr 64 %ext = sext i16 %val to i64 65 %cond = icmp eq i64 %ext, 0 66 %res = select i1 %cond, double %a, double %b 67 ret double %res 68} 69 70; Check the high end of the signed 16-bit range, using sign extension. 71define double @f6(double %a, double %b, i16 *%ptr) { 72; CHECK-LABEL: f6: 73; CHECK: clhhsi 0(%r2), 32767 74; CHECK-NEXT: ber %r14 75; CHECK: br %r14 76 %val = load i16, i16 *%ptr 77 %ext = sext i16 %val to i64 78 %cond = icmp eq i64 %ext, 32767 79 %res = select i1 %cond, double %a, double %b 80 ret double %res 81} 82 83; Check the next value up, using sign extension. 84; The condition is always false. 85define double @f7(double %a, double %b, i16 *%ptr) { 86; CHECK-LABEL: f7: 87; CHECK-NOT: clhhsi 88; CHECK: br %r14 89 %val = load i16, i16 *%ptr 90 %ext = sext i16 %val to i64 91 %cond = icmp eq i64 %ext, 32768 92 %res = select i1 %cond, double %a, double %b 93 ret double %res 94} 95 96; Check comparisons with -1, using sign extension. 97define double @f8(double %a, double %b, i16 *%ptr) { 98; CHECK-LABEL: f8: 99; CHECK: clhhsi 0(%r2), 65535 100; CHECK-NEXT: ber %r14 101; CHECK: br %r14 102 %val = load i16, i16 *%ptr 103 %ext = sext i16 %val to i64 104 %cond = icmp eq i64 %ext, -1 105 %res = select i1 %cond, double %a, double %b 106 ret double %res 107} 108 109; Check the low end of the signed 16-bit range, using sign extension. 110define double @f9(double %a, double %b, i16 *%ptr) { 111; CHECK-LABEL: f9: 112; CHECK: clhhsi 0(%r2), 32768 113; CHECK-NEXT: ber %r14 114; CHECK: br %r14 115 %val = load i16, i16 *%ptr 116 %ext = sext i16 %val to i64 117 %cond = icmp eq i64 %ext, -32768 118 %res = select i1 %cond, double %a, double %b 119 ret double %res 120} 121 122; Check the next value down, using sign extension. 123; The condition is always false. 124define double @f10(double %a, double %b, i16 *%ptr) { 125; CHECK-LABEL: f10: 126; CHECK-NOT: clhhsi 127; CHECK: br %r14 128 %val = load i16, i16 *%ptr 129 %ext = sext i16 %val to i64 130 %cond = icmp eq i64 %ext, -32769 131 %res = select i1 %cond, double %a, double %b 132 ret double %res 133} 134