forked from OSchip/llvm-project
100 lines
2.6 KiB
LLVM
100 lines
2.6 KiB
LLVM
; Test 32-bit byteswaps from registers to memory.
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;
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; RUN: llc < %s -mtriple=s390x-linux-gnu | FileCheck %s
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declare i32 @llvm.bswap.i32(i32 %a)
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; Check STRV with no displacement.
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define void @f1(i32 *%dst, i32 %a) {
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; CHECK-LABEL: f1:
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; CHECK: strv %r3, 0(%r2)
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; CHECK: br %r14
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%swapped = call i32 @llvm.bswap.i32(i32 %a)
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store i32 %swapped, i32 *%dst
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ret void
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}
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; Check the high end of the aligned STRV range.
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define void @f2(i32 *%dst, i32 %a) {
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; CHECK-LABEL: f2:
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; CHECK: strv %r3, 524284(%r2)
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; CHECK: br %r14
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%ptr = getelementptr i32, i32 *%dst, i64 131071
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%swapped = call i32 @llvm.bswap.i32(i32 %a)
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store i32 %swapped, i32 *%ptr
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ret void
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}
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; Check the next word up, which needs separate address logic.
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; Other sequences besides this one would be OK.
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define void @f3(i32 *%dst, i32 %a) {
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; CHECK-LABEL: f3:
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; CHECK: agfi %r2, 524288
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; CHECK: strv %r3, 0(%r2)
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; CHECK: br %r14
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%ptr = getelementptr i32, i32 *%dst, i64 131072
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%swapped = call i32 @llvm.bswap.i32(i32 %a)
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store i32 %swapped, i32 *%ptr
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ret void
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}
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; Check the high end of the negative aligned STRV range.
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define void @f4(i32 *%dst, i32 %a) {
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; CHECK-LABEL: f4:
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; CHECK: strv %r3, -4(%r2)
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; CHECK: br %r14
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%ptr = getelementptr i32, i32 *%dst, i64 -1
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%swapped = call i32 @llvm.bswap.i32(i32 %a)
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store i32 %swapped, i32 *%ptr
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ret void
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}
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; Check the low end of the STRV range.
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define void @f5(i32 *%dst, i32 %a) {
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; CHECK-LABEL: f5:
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; CHECK: strv %r3, -524288(%r2)
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; CHECK: br %r14
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%ptr = getelementptr i32, i32 *%dst, i64 -131072
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%swapped = call i32 @llvm.bswap.i32(i32 %a)
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store i32 %swapped, i32 *%ptr
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ret void
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}
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; Check the next word down, which needs separate address logic.
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; Other sequences besides this one would be OK.
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define void @f6(i32 *%dst, i32 %a) {
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; CHECK-LABEL: f6:
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; CHECK: agfi %r2, -524292
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; CHECK: strv %r3, 0(%r2)
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; CHECK: br %r14
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%ptr = getelementptr i32, i32 *%dst, i64 -131073
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%swapped = call i32 @llvm.bswap.i32(i32 %a)
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store i32 %swapped, i32 *%ptr
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ret void
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}
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; Check that STRV allows an index.
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define void @f7(i64 %src, i64 %index, i32 %a) {
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; CHECK-LABEL: f7:
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; CHECK: strv %r4, 524287({{%r3,%r2|%r2,%r3}})
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; CHECK: br %r14
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%add1 = add i64 %src, %index
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%add2 = add i64 %add1, 524287
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%ptr = inttoptr i64 %add2 to i32 *
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%swapped = call i32 @llvm.bswap.i32(i32 %a)
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store i32 %swapped, i32 *%ptr
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ret void
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}
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; Check that volatile stores do not use STRV, which might access the
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; storage multple times.
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define void @f8(i32 *%dst, i32 %a) {
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; CHECK-LABEL: f8:
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; CHECK: lrvr [[REG:%r[0-5]]], %r3
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; CHECK: st [[REG]], 0(%r2)
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; CHECK: br %r14
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%swapped = call i32 @llvm.bswap.i32(i32 %a)
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store volatile i32 %swapped, i32 *%dst
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ret void
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}
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