1 ; Test 32-bit subtraction in which the second operand is a sign-extended 2 ; i16 memory value. 3 ; 4 ; RUN: llc < %s -mtriple=s390x-linux-gnu | FileCheck %s 5 6 ; Check the low end of the SH range. 7 define i32 @f1(i32 %lhs, i16 *%src) { 8 ; CHECK-LABEL: f1: 9 ; CHECK: sh %r2, 0(%r3) 10 ; CHECK: br %r14 11 %half = load i16 *%src 12 %rhs = sext i16 %half to i32 13 %res = sub i32 %lhs, %rhs 14 ret i32 %res 15 } 16 17 ; Check the high end of the aligned SH range. 18 define i32 @f2(i32 %lhs, i16 *%src) { 19 ; CHECK-LABEL: f2: 20 ; CHECK: sh %r2, 4094(%r3) 21 ; CHECK: br %r14 22 %ptr = getelementptr i16 *%src, i64 2047 23 %half = load i16 *%ptr 24 %rhs = sext i16 %half to i32 25 %res = sub i32 %lhs, %rhs 26 ret i32 %res 27 } 28 29 ; Check the next halfword up, which should use SHY instead of SH. 30 define i32 @f3(i32 %lhs, i16 *%src) { 31 ; CHECK-LABEL: f3: 32 ; CHECK: shy %r2, 4096(%r3) 33 ; CHECK: br %r14 34 %ptr = getelementptr i16 *%src, i64 2048 35 %half = load i16 *%ptr 36 %rhs = sext i16 %half to i32 37 %res = sub i32 %lhs, %rhs 38 ret i32 %res 39 } 40 41 ; Check the high end of the aligned SHY range. 42 define i32 @f4(i32 %lhs, i16 *%src) { 43 ; CHECK-LABEL: f4: 44 ; CHECK: shy %r2, 524286(%r3) 45 ; CHECK: br %r14 46 %ptr = getelementptr i16 *%src, i64 262143 47 %half = load i16 *%ptr 48 %rhs = sext i16 %half to i32 49 %res = sub i32 %lhs, %rhs 50 ret i32 %res 51 } 52 53 ; Check the next halfword up, which needs separate address logic. 54 ; Other sequences besides this one would be OK. 55 define i32 @f5(i32 %lhs, i16 *%src) { 56 ; CHECK-LABEL: f5: 57 ; CHECK: agfi %r3, 524288 58 ; CHECK: sh %r2, 0(%r3) 59 ; CHECK: br %r14 60 %ptr = getelementptr i16 *%src, i64 262144 61 %half = load i16 *%ptr 62 %rhs = sext i16 %half to i32 63 %res = sub i32 %lhs, %rhs 64 ret i32 %res 65 } 66 67 ; Check the high end of the negative aligned SHY range. 68 define i32 @f6(i32 %lhs, i16 *%src) { 69 ; CHECK-LABEL: f6: 70 ; CHECK: shy %r2, -2(%r3) 71 ; CHECK: br %r14 72 %ptr = getelementptr i16 *%src, i64 -1 73 %half = load i16 *%ptr 74 %rhs = sext i16 %half to i32 75 %res = sub i32 %lhs, %rhs 76 ret i32 %res 77 } 78 79 ; Check the low end of the SHY range. 80 define i32 @f7(i32 %lhs, i16 *%src) { 81 ; CHECK-LABEL: f7: 82 ; CHECK: shy %r2, -524288(%r3) 83 ; CHECK: br %r14 84 %ptr = getelementptr i16 *%src, i64 -262144 85 %half = load i16 *%ptr 86 %rhs = sext i16 %half to i32 87 %res = sub i32 %lhs, %rhs 88 ret i32 %res 89 } 90 91 ; Check the next halfword down, which needs separate address logic. 92 ; Other sequences besides this one would be OK. 93 define i32 @f8(i32 %lhs, i16 *%src) { 94 ; CHECK-LABEL: f8: 95 ; CHECK: agfi %r3, -524290 96 ; CHECK: sh %r2, 0(%r3) 97 ; CHECK: br %r14 98 %ptr = getelementptr i16 *%src, i64 -262145 99 %half = load i16 *%ptr 100 %rhs = sext i16 %half to i32 101 %res = sub i32 %lhs, %rhs 102 ret i32 %res 103 } 104 105 ; Check that SH allows an index. 106 define i32 @f9(i32 %lhs, i64 %src, i64 %index) { 107 ; CHECK-LABEL: f9: 108 ; CHECK: sh %r2, 4094({{%r4,%r3|%r3,%r4}}) 109 ; CHECK: br %r14 110 %sub1 = add i64 %src, %index 111 %sub2 = add i64 %sub1, 4094 112 %ptr = inttoptr i64 %sub2 to i16 * 113 %half = load i16 *%ptr 114 %rhs = sext i16 %half to i32 115 %res = sub i32 %lhs, %rhs 116 ret i32 %res 117 } 118 119 ; Check that SHY allows an index. 120 define i32 @f10(i32 %lhs, i64 %src, i64 %index) { 121 ; CHECK-LABEL: f10: 122 ; CHECK: shy %r2, 4096({{%r4,%r3|%r3,%r4}}) 123 ; CHECK: br %r14 124 %sub1 = add i64 %src, %index 125 %sub2 = add i64 %sub1, 4096 126 %ptr = inttoptr i64 %sub2 to i16 * 127 %half = load i16 *%ptr 128 %rhs = sext i16 %half to i32 129 %res = sub i32 %lhs, %rhs 130 ret i32 %res 131 } 132
