1 ; Test 32-bit byteswaps from registers to memory. 2 ; 3 ; RUN: llc < %s -mtriple=s390x-linux-gnu | FileCheck %s 4 5 declare i16 @llvm.bswap.i16(i16 %a) 6 7 ; Check STRVH with no displacement. 8 define void @f1(i16 *%dst, i16 %a) { 9 ; CHECK-LABEL: f1: 10 ; CHECK: strvh %r3, 0(%r2) 11 ; CHECK: br %r14 12 %swapped = call i16 @llvm.bswap.i16(i16 %a) 13 store i16 %swapped, i16 *%dst 14 ret void 15 } 16 17 ; Check the high end of the aligned STRVH range. 18 define void @f2(i16 *%dst, i16 %a) { 19 ; CHECK-LABEL: f2: 20 ; CHECK: strvh %r3, 524286(%r2) 21 ; CHECK: br %r14 22 %ptr = getelementptr i16, i16 *%dst, i64 262143 23 %swapped = call i16 @llvm.bswap.i16(i16 %a) 24 store i16 %swapped, i16 *%ptr 25 ret void 26 } 27 28 ; Check the next word up, which needs separate address logic. 29 ; Other sequences besides this one would be OK. 30 define void @f3(i16 *%dst, i16 %a) { 31 ; CHECK-LABEL: f3: 32 ; CHECK: agfi %r2, 524288 33 ; CHECK: strvh %r3, 0(%r2) 34 ; CHECK: br %r14 35 %ptr = getelementptr i16, i16 *%dst, i64 262144 36 %swapped = call i16 @llvm.bswap.i16(i16 %a) 37 store i16 %swapped, i16 *%ptr 38 ret void 39 } 40 41 ; Check the high end of the negative aligned STRVH range. 42 define void @f4(i16 *%dst, i16 %a) { 43 ; CHECK-LABEL: f4: 44 ; CHECK: strvh %r3, -2(%r2) 45 ; CHECK: br %r14 46 %ptr = getelementptr i16, i16 *%dst, i64 -1 47 %swapped = call i16 @llvm.bswap.i16(i16 %a) 48 store i16 %swapped, i16 *%ptr 49 ret void 50 } 51 52 ; Check the low end of the STRVH range. 53 define void @f5(i16 *%dst, i16 %a) { 54 ; CHECK-LABEL: f5: 55 ; CHECK: strvh %r3, -524288(%r2) 56 ; CHECK: br %r14 57 %ptr = getelementptr i16, i16 *%dst, i64 -262144 58 %swapped = call i16 @llvm.bswap.i16(i16 %a) 59 store i16 %swapped, i16 *%ptr 60 ret void 61 } 62 63 ; Check the next word down, which needs separate address logic. 64 ; Other sequences besides this one would be OK. 65 define void @f6(i16 *%dst, i16 %a) { 66 ; CHECK-LABEL: f6: 67 ; CHECK: agfi %r2, -524290 68 ; CHECK: strvh %r3, 0(%r2) 69 ; CHECK: br %r14 70 %ptr = getelementptr i16, i16 *%dst, i64 -262145 71 %swapped = call i16 @llvm.bswap.i16(i16 %a) 72 store i16 %swapped, i16 *%ptr 73 ret void 74 } 75 76 ; Check that STRVH allows an index. 77 define void @f7(i64 %src, i64 %index, i16 %a) { 78 ; CHECK-LABEL: f7: 79 ; CHECK: strvh %r4, 524287({{%r3,%r2|%r2,%r3}}) 80 ; CHECK: br %r14 81 %add1 = add i64 %src, %index 82 %add2 = add i64 %add1, 524287 83 %ptr = inttoptr i64 %add2 to i16 * 84 %swapped = call i16 @llvm.bswap.i16(i16 %a) 85 store i16 %swapped, i16 *%ptr 86 ret void 87 } 88 89 ; Check that volatile stores do not use STRVH, which might access the 90 ; storage multple times. 91 define void @f8(i16 *%dst, i16 %a) { 92 ; CHECK-LABEL: f8: 93 ; CHECK: lrvr [[REG:%r[0-5]]], %r3 94 ; CHECK: srl [[REG]], 16 95 ; CHECK: sth [[REG]], 0(%r2) 96 ; CHECK: br %r14 97 %swapped = call i16 @llvm.bswap.i16(i16 %a) 98 store volatile i16 %swapped, i16 *%dst 99 ret void 100 } 101
