| ; Test variable-sized allocas and addresses based on them in cases where | |
| ; stack arguments are needed. | |
| ; | |
| ; RUN: llc < %s -mtriple=s390x-linux-gnu | FileCheck %s | |
| ; RUN: llc < %s -mtriple=s390x-linux-gnu | FileCheck %s -check-prefix=CHECK-A | |
| ; RUN: llc < %s -mtriple=s390x-linux-gnu | FileCheck %s -check-prefix=CHECK-B | |
| ; RUN: llc < %s -mtriple=s390x-linux-gnu | FileCheck %s -check-prefix=CHECK-C | |
| ; RUN: llc < %s -mtriple=s390x-linux-gnu | FileCheck %s -check-prefix=CHECK-D | |
| ; RUN: llc < %s -mtriple=s390x-linux-gnu | FileCheck %s -check-prefix=CHECK-FP | |
| declare i64 @bar(i8 *%a, i8 *%b, i8 *%c, i8 *%d, i8 *%e, i64 %f, i64 %g) | |
| ; Allocate %length bytes and take addresses based on the result. | |
| ; There are two stack arguments, so an offset of 160 + 2 * 8 == 176 | |
| ; is added to the copy of %r15. | |
| ; | |
| ; NOTE: 'la %r0, 177(%r1)' is actually an expected fail as it would | |
| ; be better (and possible) to load into %r3 directly. | |
| ; | |
| define i64 @f1(i64 %length, i64 %index) { | |
| ; FIXME: a better sequence would be: | |
| ; | |
| ; lgr %r1, %r15 | |
| ; sgr %r1, %r2 | |
| ; nill %r1, 0xfff8 | |
| ; lgr %r15, %r1 | |
| ; | |
| ; CHECK-LABEL: f1: | |
| ; CHECK-DAG: la [[REG1:%r[0-5]]], 7(%r2) | |
| ; CHECK-DAG: nill [[REG1]], 65528 | |
| ; CHECK-DAG: lgr [[REG2:%r[0-5]]], %r15 | |
| ; CHECK: sgr [[REG2]], [[REG1]] | |
| ; CHECK: lgr %r15, [[REG2]] | |
| ; | |
| ; CHECK-A-LABEL: f1: | |
| ; CHECK-A-DAG: lgr %r15, %r1 | |
| ; CHECK-A-DAG: la %r2, 176(%r1) | |
| ; | |
| ; CHECK-B-LABEL: f1: | |
| ; CHECK-B: lgr %r15, %r1 | |
| ; CHECK-B: la %r0, 177(%r1) | |
| ; | |
| ; CHECK-C-LABEL: f1: | |
| ; CHECK-C: lgr %r15, %r1 | |
| ; CHECK-C: la %r4, 4095({{%r3,%r1|%r1,%r3}}) | |
| ; | |
| ; CHECK-D-LABEL: f1: | |
| ; CHECK-D: lgr %r15, %r1 | |
| ; CHECK-D: lay %r5, 4096({{%r3,%r1|%r1,%r3}}) | |
| ; | |
| ; CHECK-E-LABEL: f1: | |
| ; CHECK-E: lgr %r15, %r1 | |
| ; CHECK-E: lay %r6, 4271({{%r3,%r1|%r1,%r3}}) | |
| ; | |
| ; CHECK-FP-LABEL: f1: | |
| ; CHECK-FP: lgr %r11, %r15 | |
| ; CHECK-FP: lmg %r6, %r15, 224(%r11) | |
| %a = alloca i8, i64 %length | |
| %b = getelementptr i8, i8 *%a, i64 1 | |
| %cindex = add i64 %index, 3919 | |
| %c = getelementptr i8, i8 *%a, i64 %cindex | |
| %dindex = add i64 %index, 3920 | |
| %d = getelementptr i8, i8 *%a, i64 %dindex | |
| %eindex = add i64 %index, 4095 | |
| %e = getelementptr i8, i8 *%a, i64 %eindex | |
| %count = call i64 @bar(i8 *%a, i8 *%b, i8 *%c, i8 *%d, i8 *%e, i64 0, i64 0) | |
| %res = add i64 %count, 1 | |
| ret i64 %res | |
| } |