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https://github.com/c64scene-ar/llvm-6502.git
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dff0009d0c
Use MVC for memcpy in cases where a single MVC is enough. Using MVC is a win for longer copies too, but I'll leave that for later. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@185802 91177308-0d34-0410-b5e6-96231b3b80d8
83 lines
2.2 KiB
LLVM
83 lines
2.2 KiB
LLVM
; Test memcpy using MVC.
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;
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; RUN: llc < %s -mtriple=s390x-linux-gnu | FileCheck %s
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declare void @llvm.memcpy.p0i8.p0i8.i32(i8 *nocapture, i8 *nocapture, i32, i32, i1) nounwind
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declare void @llvm.memcpy.p0i8.p0i8.i64(i8 *nocapture, i8 *nocapture, i64, i32, i1) nounwind
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define void @f1(i8 *%dest, i8 *%src) {
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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.memcpy.p0i8.p0i8.i32(i8 *%dest, i8 *%src, i32 0, i32 1,
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i1 false)
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ret void
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}
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define void @f2(i8 *%dest, i8 *%src) {
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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.memcpy.p0i8.p0i8.i64(i8 *%dest, i8 *%src, i64 0, i32 1,
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i1 false)
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ret void
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}
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define void @f3(i8 *%dest, i8 *%src) {
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; CHECK: f3:
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; CHECK: mvc 0(1,%r2), 0(%r3)
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; CHECK: br %r14
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call void @llvm.memcpy.p0i8.p0i8.i32(i8 *%dest, i8 *%src, i32 1, i32 1,
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i1 false)
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ret void
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}
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define void @f4(i8 *%dest, i8 *%src) {
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; CHECK: f4:
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; CHECK: mvc 0(1,%r2), 0(%r3)
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; CHECK: br %r14
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call void @llvm.memcpy.p0i8.p0i8.i64(i8 *%dest, i8 *%src, i64 1, i32 1,
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i1 false)
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ret void
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}
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define void @f5(i8 *%dest, i8 *%src) {
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; CHECK: f5:
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; CHECK: mvc 0(256,%r2), 0(%r3)
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; CHECK: br %r14
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call void @llvm.memcpy.p0i8.p0i8.i32(i8 *%dest, i8 *%src, i32 256, i32 1,
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i1 false)
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ret void
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}
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define void @f6(i8 *%dest, i8 *%src) {
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; CHECK: f6:
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; CHECK: mvc 0(256,%r2), 0(%r3)
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; CHECK: br %r14
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call void @llvm.memcpy.p0i8.p0i8.i64(i8 *%dest, i8 *%src, i64 256, i32 1,
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i1 false)
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ret void
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}
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; 257 bytes is too big for a single MVC. For now expect none, so that
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; the test fails and gets updated when large copies are implemented.
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define void @f7(i8 *%dest, i8 *%src) {
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; CHECK: f7:
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; CHECK-NOT: mvc
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; CHECK: br %r14
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call void @llvm.memcpy.p0i8.p0i8.i32(i8 *%dest, i8 *%src, i32 257, i32 1,
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i1 false)
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ret void
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}
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define void @f8(i8 *%dest, i8 *%src) {
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; CHECK: f8:
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; CHECK-NOT: mvc
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; CHECK: br %r14
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call void @llvm.memcpy.p0i8.p0i8.i64(i8 *%dest, i8 *%src, i64 257, i32 1,
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i1 false)
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ret void
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}
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