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| author | Richard Sandiford <rsandifo@linux.vnet.ibm.com> | 2013-07-08 09:35:23 +0000 |
|---|---|---|
| committer | Richard Sandiford <rsandifo@linux.vnet.ibm.com> | 2013-07-08 09:35:23 +0000 |
| commit | dff0009d0ced62b92cb5900bc2203ec40142ba15 (patch) | |
| tree | d79c3350233490455c9b9c623ff5376369b3f1c2 /test/CodeGen/SystemZ | |
| parent | 12b701beea6f26d2305dc18cf09838da1d068006 (diff) | |
| download | llvm-dff0009d0ced62b92cb5900bc2203ec40142ba15.tar.gz llvm-dff0009d0ced62b92cb5900bc2203ec40142ba15.tar.bz2 llvm-dff0009d0ced62b92cb5900bc2203ec40142ba15.tar.xz | |
[SystemZ] Use MVC for memcpy
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
Diffstat (limited to 'test/CodeGen/SystemZ')
| -rw-r--r-- | test/CodeGen/SystemZ/memcpy-01.ll | 82 |
1 files changed, 82 insertions, 0 deletions
diff --git a/test/CodeGen/SystemZ/memcpy-01.ll b/test/CodeGen/SystemZ/memcpy-01.ll new file mode 100644 index 0000000000..2985b036d2 --- /dev/null +++ b/test/CodeGen/SystemZ/memcpy-01.ll @@ -0,0 +1,82 @@ +; Test memcpy using MVC. +; +; RUN: llc < %s -mtriple=s390x-linux-gnu | FileCheck %s + +declare void @llvm.memcpy.p0i8.p0i8.i32(i8 *nocapture, i8 *nocapture, i32, i32, i1) nounwind +declare void @llvm.memcpy.p0i8.p0i8.i64(i8 *nocapture, i8 *nocapture, i64, i32, i1) nounwind + +define void @f1(i8 *%dest, i8 *%src) { +; CHECK: f1: +; CHECK-NOT: %r2 +; CHECK-NOT: %r3 +; CHECK: br %r14 + call void @llvm.memcpy.p0i8.p0i8.i32(i8 *%dest, i8 *%src, i32 0, i32 1, + i1 false) + ret void +} + +define void @f2(i8 *%dest, i8 *%src) { +; CHECK: f2: +; CHECK-NOT: %r2 +; CHECK-NOT: %r3 +; CHECK: br %r14 + call void @llvm.memcpy.p0i8.p0i8.i64(i8 *%dest, i8 *%src, i64 0, i32 1, + i1 false) + ret void +} + +define void @f3(i8 *%dest, i8 *%src) { +; CHECK: f3: +; CHECK: mvc 0(1,%r2), 0(%r3) +; CHECK: br %r14 + call void @llvm.memcpy.p0i8.p0i8.i32(i8 *%dest, i8 *%src, i32 1, i32 1, + i1 false) + ret void +} + +define void @f4(i8 *%dest, i8 *%src) { +; CHECK: f4: +; CHECK: mvc 0(1,%r2), 0(%r3) +; CHECK: br %r14 + call void @llvm.memcpy.p0i8.p0i8.i64(i8 *%dest, i8 *%src, i64 1, i32 1, + i1 false) + ret void +} + +define void @f5(i8 *%dest, i8 *%src) { +; CHECK: f5: +; CHECK: mvc 0(256,%r2), 0(%r3) +; CHECK: br %r14 + call void @llvm.memcpy.p0i8.p0i8.i32(i8 *%dest, i8 *%src, i32 256, i32 1, + i1 false) + ret void +} + +define void @f6(i8 *%dest, i8 *%src) { +; CHECK: f6: +; CHECK: mvc 0(256,%r2), 0(%r3) +; CHECK: br %r14 + call void @llvm.memcpy.p0i8.p0i8.i64(i8 *%dest, i8 *%src, i64 256, i32 1, + i1 false) + ret void +} + +; 257 bytes is too big for a single MVC. For now expect none, so that +; the test fails and gets updated when large copies are implemented. +define void @f7(i8 *%dest, i8 *%src) { +; CHECK: f7: +; CHECK-NOT: mvc +; CHECK: br %r14 + call void @llvm.memcpy.p0i8.p0i8.i32(i8 *%dest, i8 *%src, i32 257, i32 1, + i1 false) + ret void +} + +define void @f8(i8 *%dest, i8 *%src) { +; CHECK: f8: +; CHECK-NOT: mvc +; CHECK: br %r14 + call void @llvm.memcpy.p0i8.p0i8.i64(i8 *%dest, i8 *%src, i64 257, i32 1, + i1 false) + ret void +} |