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