1; Test LOCR and LOCGR. 2; 3; RUN: llc < %s -mtriple=s390x-linux-gnu -mcpu=z196 -verify-machineinstrs | FileCheck %s 4; 5; Run the test again to make sure it still works the same even 6; in the presence of the load-store-on-condition-2 facility. 7; RUN: llc < %s -mtriple=s390x-linux-gnu -mcpu=z13 -verify-machineinstrs | FileCheck %s 8 9; Test LOCR. 10define i32 @f1(i32 %a, i32 %b, i32 %limit) { 11; CHECK-LABEL: f1: 12; CHECK: clfi %r4, 42 13; CHECK: locrhe %r2, %r3 14; CHECK: br %r14 15 %cond = icmp ult i32 %limit, 42 16 %res = select i1 %cond, i32 %a, i32 %b 17 ret i32 %res 18} 19 20; Test LOCGR. 21define i64 @f2(i64 %a, i64 %b, i64 %limit) { 22; CHECK-LABEL: f2: 23; CHECK: clgfi %r4, 42 24; CHECK: locgrhe %r2, %r3 25; CHECK: br %r14 26 %cond = icmp ult i64 %limit, 42 27 %res = select i1 %cond, i64 %a, i64 %b 28 ret i64 %res 29} 30 31; Test LOCR in a case that could use COMPARE AND BRANCH. We prefer using 32; LOCR if possible. 33define i32 @f3(i32 %a, i32 %b, i32 %limit) { 34; CHECK-LABEL: f3: 35; CHECK: chi %r4, 42 36; CHECK: locrlh %r2, %r3 37; CHECK: br %r14 38 %cond = icmp eq i32 %limit, 42 39 %res = select i1 %cond, i32 %a, i32 %b 40 ret i32 %res 41} 42 43; ...and again for LOCGR. 44define i64 @f4(i64 %a, i64 %b, i64 %limit) { 45; CHECK-LABEL: f4: 46; CHECK: cghi %r4, 42 47; CHECK: locgrlh %r2, %r3 48; CHECK: br %r14 49 %cond = icmp eq i64 %limit, 42 50 %res = select i1 %cond, i64 %a, i64 %b 51 ret i64 %res 52} 53 54; Check that we also get LOCR as a result of early if-conversion. 55define i32 @f5(i32 %a, i32 %b, i32 %limit) { 56; CHECK-LABEL: f5: 57; CHECK: clfi %r4, 41 58; CHECK: locrh %r2, %r3 59; CHECK: br %r14 60entry: 61 %cond = icmp ult i32 %limit, 42 62 br i1 %cond, label %if.then, label %return 63 64if.then: 65 br label %return 66 67return: 68 %res = phi i32 [ %a, %if.then ], [ %b, %entry ] 69 ret i32 %res 70} 71 72; ... and likewise for LOCGR. 73define i64 @f6(i64 %a, i64 %b, i64 %limit) { 74; CHECK-LABEL: f6: 75; CHECK: clgfi %r4, 41 76; CHECK: locgrh %r2, %r3 77; CHECK: br %r14 78entry: 79 %cond = icmp ult i64 %limit, 42 80 br i1 %cond, label %if.then, label %return 81 82if.then: 83 br label %return 84 85return: 86 %res = phi i64 [ %a, %if.then ], [ %b, %entry ] 87 ret i64 %res 88} 89 90; Check that inverting the condition works as well. 91define i32 @f7(i32 %a, i32 %b, i32 %limit) { 92; CHECK-LABEL: f7: 93; CHECK: clfi %r4, 41 94; CHECK: locrle %r2, %r3 95; CHECK: br %r14 96entry: 97 %cond = icmp ult i32 %limit, 42 98 br i1 %cond, label %if.then, label %return 99 100if.then: 101 br label %return 102 103return: 104 %res = phi i32 [ %b, %if.then ], [ %a, %entry ] 105 ret i32 %res 106} 107 108; ... and likewise for LOCGR. 109define i64 @f8(i64 %a, i64 %b, i64 %limit) { 110; CHECK-LABEL: f8: 111; CHECK: clgfi %r4, 41 112; CHECK: locgrle %r2, %r3 113; CHECK: br %r14 114entry: 115 %cond = icmp ult i64 %limit, 42 116 br i1 %cond, label %if.then, label %return 117 118if.then: 119 br label %return 120 121return: 122 %res = phi i64 [ %b, %if.then ], [ %a, %entry ] 123 ret i64 %res 124} 125 126