| Ulrich Weigand | 9e3577f | 2013-05-06 16:17:29 +0000 | [diff] [blame] | 1 | ; Test the "R" asm constraint, which accepts addresses that have a base, |
| 2 | ; an index and a 12-bit displacement. |
| 3 | ; |
| 4 | ; RUN: llc < %s -mtriple=s390x-linux-gnu | FileCheck %s |
| 5 | |
| 6 | ; Check the lowest range. |
| 7 | define void @f1(i64 %base) { |
| Stephen Lin | d24ab20 | 2013-07-14 06:24:09 +0000 | [diff] [blame] | 8 | ; CHECK-LABEL: f1: |
| Ulrich Weigand | 9e3577f | 2013-05-06 16:17:29 +0000 | [diff] [blame] | 9 | ; CHECK: blah 0(%r2) |
| 10 | ; CHECK: br %r14 |
| 11 | %addr = inttoptr i64 %base to i64 * |
| 12 | call void asm "blah $0", "=*R" (i64 *%addr) |
| 13 | ret void |
| 14 | } |
| 15 | |
| 16 | ; Check the next lowest byte. |
| 17 | define void @f2(i64 %base) { |
| Stephen Lin | d24ab20 | 2013-07-14 06:24:09 +0000 | [diff] [blame] | 18 | ; CHECK-LABEL: f2: |
| Ulrich Weigand | 9e3577f | 2013-05-06 16:17:29 +0000 | [diff] [blame] | 19 | ; CHECK: aghi %r2, -1 |
| 20 | ; CHECK: blah 0(%r2) |
| 21 | ; CHECK: br %r14 |
| 22 | %add = add i64 %base, -1 |
| 23 | %addr = inttoptr i64 %add to i64 * |
| 24 | call void asm "blah $0", "=*R" (i64 *%addr) |
| 25 | ret void |
| 26 | } |
| 27 | |
| 28 | ; Check the highest range. |
| 29 | define void @f3(i64 %base) { |
| Stephen Lin | d24ab20 | 2013-07-14 06:24:09 +0000 | [diff] [blame] | 30 | ; CHECK-LABEL: f3: |
| Ulrich Weigand | 9e3577f | 2013-05-06 16:17:29 +0000 | [diff] [blame] | 31 | ; CHECK: blah 4095(%r2) |
| 32 | ; CHECK: br %r14 |
| 33 | %add = add i64 %base, 4095 |
| 34 | %addr = inttoptr i64 %add to i64 * |
| 35 | call void asm "blah $0", "=*R" (i64 *%addr) |
| 36 | ret void |
| 37 | } |
| 38 | |
| 39 | ; Check the next highest byte. |
| 40 | define void @f4(i64 %base) { |
| Stephen Lin | d24ab20 | 2013-07-14 06:24:09 +0000 | [diff] [blame] | 41 | ; CHECK-LABEL: f4: |
| Ulrich Weigand | 9e3577f | 2013-05-06 16:17:29 +0000 | [diff] [blame] | 42 | ; CHECK: aghi %r2, 4096 |
| 43 | ; CHECK: blah 0(%r2) |
| 44 | ; CHECK: br %r14 |
| 45 | %add = add i64 %base, 4096 |
| 46 | %addr = inttoptr i64 %add to i64 * |
| 47 | call void asm "blah $0", "=*R" (i64 *%addr) |
| 48 | ret void |
| 49 | } |
| 50 | |
| 51 | ; FIXME: at the moment the precise constraint is not passed down to |
| 52 | ; target code, so we must conservatively treat "R" as "Q". |