1; Test moves of integers to 4-byte memory locations. 2; 3; RUN: llc < %s -mtriple=s390x-linux-gnu | FileCheck %s 4 5; Check moves of zero. 6define void @f1(i32 *%a) { 7; CHECK-LABEL: f1: 8; CHECK: mvhi 0(%r2), 0 9; CHECK: br %r14 10 store i32 0, i32 *%a 11 ret void 12} 13 14; Check the high end of the signed 16-bit range. 15define void @f2(i32 *%a) { 16; CHECK-LABEL: f2: 17; CHECK: mvhi 0(%r2), 32767 18; CHECK: br %r14 19 store i32 32767, i32 *%a 20 ret void 21} 22 23; Check the next value up, which can't use MVHI. 24define void @f3(i32 *%a) { 25; CHECK-LABEL: f3: 26; CHECK-NOT: mvhi 27; CHECK: br %r14 28 store i32 32768, i32 *%a 29 ret void 30} 31 32; Check moves of -1. 33define void @f4(i32 *%a) { 34; CHECK-LABEL: f4: 35; CHECK: mvhi 0(%r2), -1 36; CHECK: br %r14 37 store i32 -1, i32 *%a 38 ret void 39} 40 41; Check the low end of the MVHI range. 42define void @f5(i32 *%a) { 43; CHECK-LABEL: f5: 44; CHECK: mvhi 0(%r2), -32768 45; CHECK: br %r14 46 store i32 -32768, i32 *%a 47 ret void 48} 49 50; Check the next value down, which can't use MVHI. 51define void @f6(i32 *%a) { 52; CHECK-LABEL: f6: 53; CHECK-NOT: mvhi 54; CHECK: br %r14 55 store i32 -32769, i32 *%a 56 ret void 57} 58 59; Check the high end of the MVHI range. 60define void @f7(i32 *%a) { 61; CHECK-LABEL: f7: 62; CHECK: mvhi 4092(%r2), 42 63; CHECK: br %r14 64 %ptr = getelementptr i32 *%a, i64 1023 65 store i32 42, i32 *%ptr 66 ret void 67} 68 69; Check the next word up, which needs separate address logic. 70; Other sequences besides this one would be OK. 71define void @f8(i32 *%a) { 72; CHECK-LABEL: f8: 73; CHECK: aghi %r2, 4096 74; CHECK: mvhi 0(%r2), 42 75; CHECK: br %r14 76 %ptr = getelementptr i32 *%a, i64 1024 77 store i32 42, i32 *%ptr 78 ret void 79} 80 81; Check negative displacements, which also need separate address logic. 82define void @f9(i32 *%a) { 83; CHECK-LABEL: f9: 84; CHECK: aghi %r2, -4 85; CHECK: mvhi 0(%r2), 42 86; CHECK: br %r14 87 %ptr = getelementptr i32 *%a, i64 -1 88 store i32 42, i32 *%ptr 89 ret void 90} 91 92; Check that MVHI does not allow an index 93define void @f10(i64 %src, i64 %index) { 94; CHECK-LABEL: f10: 95; CHECK: agr %r2, %r3 96; CHECK: mvhi 0(%r2), 42 97; CHECK: br %r14 98 %add = add i64 %src, %index 99 %ptr = inttoptr i64 %add to i32 * 100 store i32 42, i32 *%ptr 101 ret void 102} 103