| ; Test moves of integers to 8-byte memory locations. |
| ; |
| ; RUN: llc < %s -mtriple=s390x-linux-gnu | FileCheck %s |
| |
| ; Check moves of zero. |
| define void @f1(i64 *%a) { |
| ; CHECK: f1: |
| ; CHECK: mvghi 0(%r2), 0 |
| ; CHECK: br %r14 |
| store i64 0, i64 *%a |
| ret void |
| } |
| |
| ; Check the high end of the signed 16-bit range. |
| define void @f2(i64 *%a) { |
| ; CHECK: f2: |
| ; CHECK: mvghi 0(%r2), 32767 |
| ; CHECK: br %r14 |
| store i64 32767, i64 *%a |
| ret void |
| } |
| |
| ; Check the next value up, which can't use MVGHI. |
| define void @f3(i64 *%a) { |
| ; CHECK: f3: |
| ; CHECK-NOT: mvghi |
| ; CHECK: br %r14 |
| store i64 32768, i64 *%a |
| ret void |
| } |
| |
| ; Check moves of -1. |
| define void @f4(i64 *%a) { |
| ; CHECK: f4: |
| ; CHECK: mvghi 0(%r2), -1 |
| ; CHECK: br %r14 |
| store i64 -1, i64 *%a |
| ret void |
| } |
| |
| ; Check the low end of the MVGHI range. |
| define void @f5(i64 *%a) { |
| ; CHECK: f5: |
| ; CHECK: mvghi 0(%r2), -32768 |
| ; CHECK: br %r14 |
| store i64 -32768, i64 *%a |
| ret void |
| } |
| |
| ; Check the next value down, which can't use MVGHI. |
| define void @f6(i64 *%a) { |
| ; CHECK: f6: |
| ; CHECK-NOT: mvghi |
| ; CHECK: br %r14 |
| store i64 -32769, i64 *%a |
| ret void |
| } |
| |
| ; Check the high end of the MVGHI range. |
| define void @f7(i64 *%a) { |
| ; CHECK: f7: |
| ; CHECK: mvghi 4088(%r2), 42 |
| ; CHECK: br %r14 |
| %ptr = getelementptr i64 *%a, i64 511 |
| store i64 42, i64 *%ptr |
| ret void |
| } |
| |
| ; Check the next doubleword up, which needs separate address logic. |
| ; Other sequences besides this one would be OK. |
| define void @f8(i64 *%a) { |
| ; CHECK: f8: |
| ; CHECK: aghi %r2, 4096 |
| ; CHECK: mvghi 0(%r2), 42 |
| ; CHECK: br %r14 |
| %ptr = getelementptr i64 *%a, i64 512 |
| store i64 42, i64 *%ptr |
| ret void |
| } |
| |
| ; Check negative displacements, which also need separate address logic. |
| define void @f9(i64 *%a) { |
| ; CHECK: f9: |
| ; CHECK: aghi %r2, -8 |
| ; CHECK: mvghi 0(%r2), 42 |
| ; CHECK: br %r14 |
| %ptr = getelementptr i64 *%a, i64 -1 |
| store i64 42, i64 *%ptr |
| ret void |
| } |
| |
| ; Check that MVGHI does not allow an index |
| define void @f10(i64 %src, i64 %index) { |
| ; CHECK: f10: |
| ; CHECK: agr %r2, %r3 |
| ; CHECK: mvghi 0(%r2), 42 |
| ; CHECK: br %r14 |
| %add = add i64 %src, %index |
| %ptr = inttoptr i64 %add to i64 * |
| store i64 42, i64 *%ptr |
| ret void |
| } |