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842a1be06c
Lengths up to a certain threshold (currently 6 * 256) use a series of MVCs. Lengths above that threshold use a loop to handle X*256 bytes followed by a single MVC to handle the excess (if any). This loop will also be needed in future when support for variable lengths is added. Because the same tablegen classes are used to define MVC and CLC, the patch also has the side-effect of defining a pseudo loop instruction for CLC. That instruction isn't used yet (and wouldn't be handled correctly if it were). I'm planning to use it soon though. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@189331 91177308-0d34-0410-b5e6-96231b3b80d8
163 lines
3.9 KiB
LLVM
163 lines
3.9 KiB
LLVM
; Test memset in cases where the set value is a constant other than 0 and -1.
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;
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; RUN: llc < %s -mtriple=s390x-linux-gnu | FileCheck %s
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declare void @llvm.memset.p0i8.i32(i8 *nocapture, i8, i32, i32, i1) nounwind
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declare void @llvm.memset.p0i8.i64(i8 *nocapture, i8, i64, i32, i1) nounwind
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; No bytes, i32 version.
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define void @f1(i8 *%dest) {
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; CHECK-LABEL: f1:
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; CHECK-NOT: %r2
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; CHECK: br %r14
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call void @llvm.memset.p0i8.i32(i8 *%dest, i8 128, i32 0, i32 1, i1 false)
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ret void
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}
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; No bytes, i64 version.
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define void @f2(i8 *%dest) {
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; CHECK-LABEL: f2:
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; CHECK-NOT: %r2
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; CHECK: br %r14
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call void @llvm.memset.p0i8.i64(i8 *%dest, i8 128, i64 0, i32 1, i1 false)
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ret void
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}
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; 1 byte, i32 version.
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define void @f3(i8 *%dest) {
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; CHECK-LABEL: f3:
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; CHECK: mvi 0(%r2), 128
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; CHECK: br %r14
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call void @llvm.memset.p0i8.i32(i8 *%dest, i8 128, i32 1, i32 1, i1 false)
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ret void
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}
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; 1 byte, i64 version.
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define void @f4(i8 *%dest) {
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; CHECK-LABEL: f4:
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; CHECK: mvi 0(%r2), 128
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; CHECK: br %r14
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call void @llvm.memset.p0i8.i64(i8 *%dest, i8 128, i64 1, i32 1, i1 false)
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ret void
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}
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; 2 bytes, i32 version.
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define void @f5(i8 *%dest) {
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; CHECK-LABEL: f5:
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; CHECK: mvhhi 0(%r2), -32640
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; CHECK: br %r14
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call void @llvm.memset.p0i8.i32(i8 *%dest, i8 128, i32 2, i32 1, i1 false)
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ret void
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}
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; 2 bytes, i64 version.
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define void @f6(i8 *%dest) {
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; CHECK-LABEL: f6:
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; CHECK: mvhhi 0(%r2), -32640
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; CHECK: br %r14
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call void @llvm.memset.p0i8.i64(i8 *%dest, i8 128, i64 2, i32 1, i1 false)
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ret void
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}
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; 3 bytes, i32 version.
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define void @f7(i8 *%dest) {
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; CHECK-LABEL: f7:
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; CHECK-DAG: mvhhi 0(%r2), -32640
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; CHECK-DAG: mvi 2(%r2), 128
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; CHECK: br %r14
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call void @llvm.memset.p0i8.i32(i8 *%dest, i8 128, i32 3, i32 1, i1 false)
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ret void
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}
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; 3 bytes, i64 version.
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define void @f8(i8 *%dest) {
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; CHECK-LABEL: f8:
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; CHECK-DAG: mvhhi 0(%r2), -32640
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; CHECK-DAG: mvi 2(%r2), 128
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; CHECK: br %r14
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call void @llvm.memset.p0i8.i64(i8 *%dest, i8 128, i64 3, i32 1, i1 false)
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ret void
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}
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; 4 bytes, i32 version.
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define void @f9(i8 *%dest) {
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; CHECK-LABEL: f9:
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; CHECK: iilf [[REG:%r[0-5]]], 2155905152
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; CHECK: st [[REG]], 0(%r2)
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; CHECK: br %r14
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call void @llvm.memset.p0i8.i32(i8 *%dest, i8 128, i32 4, i32 1, i1 false)
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ret void
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}
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; 4 bytes, i64 version.
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define void @f10(i8 *%dest) {
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; CHECK-LABEL: f10:
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; CHECK: iilf [[REG:%r[0-5]]], 2155905152
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; CHECK: st [[REG]], 0(%r2)
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; CHECK: br %r14
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call void @llvm.memset.p0i8.i64(i8 *%dest, i8 128, i64 4, i32 1, i1 false)
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ret void
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}
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; 5 bytes, i32 version.
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define void @f11(i8 *%dest) {
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; CHECK-LABEL: f11:
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; CHECK: mvi 0(%r2), 128
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; CHECK: mvc 1(4,%r2), 0(%r2)
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; CHECK: br %r14
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call void @llvm.memset.p0i8.i32(i8 *%dest, i8 128, i32 5, i32 1, i1 false)
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ret void
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}
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; 5 bytes, i64 version.
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define void @f12(i8 *%dest) {
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; CHECK-LABEL: f12:
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; CHECK: mvi 0(%r2), 128
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; CHECK: mvc 1(4,%r2), 0(%r2)
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; CHECK: br %r14
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call void @llvm.memset.p0i8.i64(i8 *%dest, i8 128, i64 5, i32 1, i1 false)
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ret void
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}
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; 257 bytes, i32 version.
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define void @f13(i8 *%dest) {
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; CHECK-LABEL: f13:
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; CHECK: mvi 0(%r2), 128
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; CHECK: mvc 1(256,%r2), 0(%r2)
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; CHECK: br %r14
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call void @llvm.memset.p0i8.i32(i8 *%dest, i8 128, i32 257, i32 1, i1 false)
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ret void
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}
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; 257 bytes, i64 version.
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define void @f14(i8 *%dest) {
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; CHECK-LABEL: f14:
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; CHECK: mvi 0(%r2), 128
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; CHECK: mvc 1(256,%r2), 0(%r2)
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; CHECK: br %r14
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call void @llvm.memset.p0i8.i64(i8 *%dest, i8 128, i64 257, i32 1, i1 false)
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ret void
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}
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; 258 bytes, i32 version. We need two MVCs.
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define void @f15(i8 *%dest) {
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; CHECK-LABEL: f15:
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; CHECK: mvi 0(%r2), 128
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; CHECK: mvc 1(256,%r2), 0(%r2)
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; CHECK: mvc 257(1,%r2), 256(%r2)
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; CHECK: br %r14
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call void @llvm.memset.p0i8.i32(i8 *%dest, i8 128, i32 258, i32 1, i1 false)
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ret void
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}
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; 258 bytes, i64 version.
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define void @f16(i8 *%dest) {
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; CHECK-LABEL: f16:
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; CHECK: mvi 0(%r2), 128
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; CHECK: mvc 1(256,%r2), 0(%r2)
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; CHECK: mvc 257(1,%r2), 256(%r2)
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; CHECK: br %r14
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call void @llvm.memset.p0i8.i64(i8 *%dest, i8 128, i64 258, i32 1, i1 false)
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ret void
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}
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