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https://github.com/c64scene-ar/llvm-6502.git
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f6ea5e0d80
Use "STC;MVC" for memsets that are too big for two STCs or MV...Is yet small enough for a single MVC. As with memcpy, I'm leaving longer cases till later. The number of tests might seem excessive, but f33 & f34 from memset-04.ll failed the first cut because I'd not added the "?:" on the calculation of Size1. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@185918 91177308-0d34-0410-b5e6-96231b3b80d8
125 lines
3.1 KiB
LLVM
125 lines
3.1 KiB
LLVM
; Test memset in cases where the set value is variable.
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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, i8 %val) {
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; CHECK: f1:
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; CHECK-NOT: %r2
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; CHECK-NOT: %r3
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; CHECK: br %r14
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call void @llvm.memset.p0i8.i32(i8 *%dest, i8 %val, 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, i8 %val) {
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; CHECK: f2:
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; CHECK-NOT: %r2
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; CHECK-NOT: %r3
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; CHECK: br %r14
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call void @llvm.memset.p0i8.i64(i8 *%dest, i8 %val, 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, i8 %val) {
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; CHECK: f3:
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; CHECK: stc %r3, 0(%r2)
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; CHECK: br %r14
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call void @llvm.memset.p0i8.i32(i8 *%dest, i8 %val, 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, i8 %val) {
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; CHECK: f4:
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; CHECK: stc %r3, 0(%r2)
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; CHECK: br %r14
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call void @llvm.memset.p0i8.i64(i8 *%dest, i8 %val, 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, i8 %val) {
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; CHECK: f5:
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; CHECK-DAG: stc %r3, 0(%r2)
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; CHECK-DAG: stc %r3, 1(%r2)
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; CHECK: br %r14
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call void @llvm.memset.p0i8.i32(i8 *%dest, i8 %val, 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, i8 %val) {
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; CHECK: f6:
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; CHECK-DAG: stc %r3, 0(%r2)
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; CHECK-DAG: stc %r3, 1(%r2)
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; CHECK: br %r14
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call void @llvm.memset.p0i8.i64(i8 *%dest, i8 %val, 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, i8 %val) {
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; CHECK: f7:
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; CHECK: stc %r3, 0(%r2)
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; CHECK: mvc 1(2,%r2), 0(%r2)
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; CHECK: br %r14
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call void @llvm.memset.p0i8.i32(i8 *%dest, i8 %val, 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, i8 %val) {
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; CHECK: f8:
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; CHECK: stc %r3, 0(%r2)
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; CHECK: mvc 1(2,%r2), 0(%r2)
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; CHECK: br %r14
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call void @llvm.memset.p0i8.i64(i8 *%dest, i8 %val, i64 3, 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 @f9(i8 *%dest, i8 %val) {
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; CHECK: f9:
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; CHECK: stc %r3, 0(%r2)
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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 %val, 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 @f10(i8 *%dest, i8 %val) {
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; CHECK: f10:
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; CHECK: stc %r3, 0(%r2)
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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 %val, i64 257, i32 1, i1 false)
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ret void
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}
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; 258 bytes, i32 version. 258 bytes is too big for a single MVC.
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; For now expect none, so that the test fails and gets updated when
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; large copies are implemented.
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define void @f11(i8 *%dest, i8 %val) {
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; CHECK: f11:
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; CHECK-NOT: mvc
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; CHECK: br %r14
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call void @llvm.memset.p0i8.i32(i8 *%dest, i8 %val, i32 258, i32 1, i1 false)
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ret void
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}
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; 258 bytes, i64 version, with the same comments as above.
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define void @f12(i8 *%dest, i8 %val) {
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; CHECK: f12:
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; CHECK-NOT: mvc
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; CHECK: br %r14
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call void @llvm.memset.p0i8.i64(i8 *%dest, i8 %val, i64 258, i32 1, i1 false)
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ret void
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}
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