| # Test cases where MVC is used for spill slots that end up being out of range. |
| # RUN: python %s | llc -mtriple=s390x-linux-gnu | FileCheck %s |
| |
| # There are 8 usable call-saved GPRs, two of which are needed for the base |
| # registers. The first 160 bytes of the frame are needed for the ABI |
| # call frame, and a further 8 bytes are needed for the emergency spill slot. |
| # That means we will have at least one out-of-range slot if: |
| # |
| # count == (4096 - 168) / 8 + 6 + 1 == 498 |
| # |
| # Add in some extra room and check both %r15+4096 (the first out-of-range slot) |
| # and %r15+4104. |
| # |
| # CHECK: f1: |
| # CHECK: lay [[REG:%r[0-5]]], 4096(%r15) |
| # CHECK: mvc 0(8,[[REG]]), {{[0-9]+}}({{%r[0-9]+}}) |
| # CHECK: brasl %r14, foo@PLT |
| # CHECK: lay [[REG:%r[0-5]]], 4096(%r15) |
| # CHECK: mvc {{[0-9]+}}(8,{{%r[0-9]+}}), 8([[REG]]) |
| # CHECK: br %r14 |
| |
| from __future__ import print_function |
| |
| count = 500 |
| |
| print('declare void @foo()') |
| print('') |
| print('define void @f1(i64 *%base0, i64 *%base1) {') |
| |
| for i in range(count): |
| print(' %%ptr%d = getelementptr i64, i64 *%%base%d, i64 %d' % (i, i % 2, i / 2)) |
| print(' %%val%d = load i64 , i64 *%%ptr%d' % (i, i)) |
| print('') |
| |
| print(' call void @foo()') |
| print('') |
| |
| for i in range(count): |
| print(' store i64 %%val%d, i64 *%%ptr%d' % (i, i)) |
| |
| print('') |
| print(' ret void') |
| print('}') |
