| Ulrich Weigand | 9e3577f | 2013-05-06 16:17:29 +0000 | [diff] [blame^] | 1 | ; Test sign extensions from a byte to an i32. |
| 2 | ; |
| 3 | ; RUN: llc < %s -mtriple=s390x-linux-gnu | FileCheck %s |
| 4 | |
| 5 | ; Test register extension, starting with an i32. |
| 6 | define i32 @f1(i32 %a) { |
| 7 | ; CHECK: f1: |
| 8 | ; CHECK: lbr %r2, %r2 |
| 9 | ; CHECk: br %r14 |
| 10 | %byte = trunc i32 %a to i8 |
| 11 | %ext = sext i8 %byte to i32 |
| 12 | ret i32 %ext |
| 13 | } |
| 14 | |
| 15 | ; ...and again with an i64. |
| 16 | define i32 @f2(i64 %a) { |
| 17 | ; CHECK: f2: |
| 18 | ; CHECK: lbr %r2, %r2 |
| 19 | ; CHECk: br %r14 |
| 20 | %byte = trunc i64 %a to i8 |
| 21 | %ext = sext i8 %byte to i32 |
| 22 | ret i32 %ext |
| 23 | } |
| 24 | |
| 25 | ; Check LB with no displacement. |
| 26 | define i32 @f3(i8 *%src) { |
| 27 | ; CHECK: f3: |
| 28 | ; CHECK: lb %r2, 0(%r2) |
| 29 | ; CHECK: br %r14 |
| 30 | %byte = load i8 *%src |
| 31 | %ext = sext i8 %byte to i32 |
| 32 | ret i32 %ext |
| 33 | } |
| 34 | |
| 35 | ; Check the high end of the LB range. |
| 36 | define i32 @f4(i8 *%src) { |
| 37 | ; CHECK: f4: |
| 38 | ; CHECK: lb %r2, 524287(%r2) |
| 39 | ; CHECK: br %r14 |
| 40 | %ptr = getelementptr i8 *%src, i64 524287 |
| 41 | %byte = load i8 *%ptr |
| 42 | %ext = sext i8 %byte to i32 |
| 43 | ret i32 %ext |
| 44 | } |
| 45 | |
| 46 | ; Check the next byte up, which needs separate address logic. |
| 47 | ; Other sequences besides this one would be OK. |
| 48 | define i32 @f5(i8 *%src) { |
| 49 | ; CHECK: f5: |
| 50 | ; CHECK: agfi %r2, 524288 |
| 51 | ; CHECK: lb %r2, 0(%r2) |
| 52 | ; CHECK: br %r14 |
| 53 | %ptr = getelementptr i8 *%src, i64 524288 |
| 54 | %byte = load i8 *%ptr |
| 55 | %ext = sext i8 %byte to i32 |
| 56 | ret i32 %ext |
| 57 | } |
| 58 | |
| 59 | ; Check the high end of the negative LB range. |
| 60 | define i32 @f6(i8 *%src) { |
| 61 | ; CHECK: f6: |
| 62 | ; CHECK: lb %r2, -1(%r2) |
| 63 | ; CHECK: br %r14 |
| 64 | %ptr = getelementptr i8 *%src, i64 -1 |
| 65 | %byte = load i8 *%ptr |
| 66 | %ext = sext i8 %byte to i32 |
| 67 | ret i32 %ext |
| 68 | } |
| 69 | |
| 70 | ; Check the low end of the LB range. |
| 71 | define i32 @f7(i8 *%src) { |
| 72 | ; CHECK: f7: |
| 73 | ; CHECK: lb %r2, -524288(%r2) |
| 74 | ; CHECK: br %r14 |
| 75 | %ptr = getelementptr i8 *%src, i64 -524288 |
| 76 | %byte = load i8 *%ptr |
| 77 | %ext = sext i8 %byte to i32 |
| 78 | ret i32 %ext |
| 79 | } |
| 80 | |
| 81 | ; Check the next byte down, which needs separate address logic. |
| 82 | ; Other sequences besides this one would be OK. |
| 83 | define i32 @f8(i8 *%src) { |
| 84 | ; CHECK: f8: |
| 85 | ; CHECK: agfi %r2, -524289 |
| 86 | ; CHECK: lb %r2, 0(%r2) |
| 87 | ; CHECK: br %r14 |
| 88 | %ptr = getelementptr i8 *%src, i64 -524289 |
| 89 | %byte = load i8 *%ptr |
| 90 | %ext = sext i8 %byte to i32 |
| 91 | ret i32 %ext |
| 92 | } |
| 93 | |
| 94 | ; Check that LB allows an index |
| 95 | define i32 @f9(i64 %src, i64 %index) { |
| 96 | ; CHECK: f9: |
| 97 | ; CHECK: lb %r2, 524287(%r3,%r2) |
| 98 | ; CHECK: br %r14 |
| 99 | %add1 = add i64 %src, %index |
| 100 | %add2 = add i64 %add1, 524287 |
| 101 | %ptr = inttoptr i64 %add2 to i8 * |
| 102 | %byte = load i8 *%ptr |
| 103 | %ext = sext i8 %byte to i32 |
| 104 | ret i32 %ext |
| 105 | } |