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