X-Git-Url: http://plrg.eecs.uci.edu/git/?a=blobdiff_plain;f=test%2FCodeGen%2FSystemZ%2Fmemcpy-01.ll;h=1d7b28e940b9ee86bd399fd65c67315ca7b13d5d;hb=198d8baafbfdfcf5a5e219602a5d94ed263973b4;hp=7cb58b31cce65f8d1793734afaed8fe4f6e83a84;hpb=8b2b8a18354546d534b72f912153a3252ab4b857;p=oota-llvm.git

diff --git a/test/CodeGen/SystemZ/memcpy-01.ll b/test/CodeGen/SystemZ/memcpy-01.ll
index 7cb58b31cce..1d7b28e940b 100644
--- a/test/CodeGen/SystemZ/memcpy-01.ll
+++ b/test/CodeGen/SystemZ/memcpy-01.ll
@@ -4,7 +4,9 @@
 
 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
+declare void @foo(i8 *, i8 *)
 
+; Test a no-op move, i32 version.
 define void @f1(i8 *%dest, i8 *%src) {
 ; CHECK-LABEL: f1:
 ; CHECK-NOT: %r2
@@ -15,6 +17,7 @@ define void @f1(i8 *%dest, i8 *%src) {
   ret void
 }
 
+; Test a no-op move, i64 version.
 define void @f2(i8 *%dest, i8 *%src) {
 ; CHECK-LABEL: f2:
 ; CHECK-NOT: %r2
@@ -25,6 +28,7 @@ define void @f2(i8 *%dest, i8 *%src) {
   ret void
 }
 
+; Test a 1-byte move, i32 version.
 define void @f3(i8 *%dest, i8 *%src) {
 ; CHECK-LABEL: f3:
 ; CHECK: mvc 0(1,%r2), 0(%r3)
@@ -34,6 +38,7 @@ define void @f3(i8 *%dest, i8 *%src) {
   ret void
 }
 
+; Test a 1-byte move, i64 version.
 define void @f4(i8 *%dest, i8 *%src) {
 ; CHECK-LABEL: f4:
 ; CHECK: mvc 0(1,%r2), 0(%r3)
@@ -43,6 +48,7 @@ define void @f4(i8 *%dest, i8 *%src) {
   ret void
 }
 
+; Test the upper range of a single MVC, i32 version.
 define void @f5(i8 *%dest, i8 *%src) {
 ; CHECK-LABEL: f5:
 ; CHECK: mvc 0(256,%r2), 0(%r3)
@@ -52,6 +58,7 @@ define void @f5(i8 *%dest, i8 *%src) {
   ret void
 }
 
+; Test the upper range of a single MVC, i64 version.
 define void @f6(i8 *%dest, i8 *%src) {
 ; CHECK-LABEL: f6:
 ; CHECK: mvc 0(256,%r2), 0(%r3)
@@ -61,22 +68,168 @@ define void @f6(i8 *%dest, i8 *%src) {
   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.
+; Test the first case that needs two MVCs.
 define void @f7(i8 *%dest, i8 *%src) {
 ; CHECK-LABEL: f7:
-; CHECK-NOT: mvc
+; CHECK: mvc 0(256,%r2), 0(%r3)
+; CHECK: mvc 256(1,%r2), 256(%r3)
 ; CHECK: br %r14
   call void @llvm.memcpy.p0i8.p0i8.i32(i8 *%dest, i8 *%src, i32 257, i32 1,
                                        i1 false)
   ret void
 }
 
+; Test the last-but-one case that needs two MVCs.
 define void @f8(i8 *%dest, i8 *%src) {
 ; CHECK-LABEL: f8:
-; CHECK-NOT: mvc
+; CHECK: mvc 0(256,%r2), 0(%r3)
+; CHECK: mvc 256(255,%r2), 256(%r3)
+; CHECK: br %r14
+  call void @llvm.memcpy.p0i8.p0i8.i64(i8 *%dest, i8 *%src, i64 511, i32 1,
+                                       i1 false)
+  ret void
+}
+
+; Test the last case that needs two MVCs.
+define void @f9(i8 *%dest, i8 *%src) {
+; CHECK-LABEL: f9:
+; CHECK: mvc 0(256,%r2), 0(%r3)
+; CHECK: mvc 256(256,%r2), 256(%r3)
+; CHECK: br %r14
+  call void @llvm.memcpy.p0i8.p0i8.i64(i8 *%dest, i8 *%src, i64 512, i32 1,
+                                       i1 false)
+  ret void
+}
+
+; Test an arbitrary value that uses straight-line code.
+define void @f10(i8 *%dest, i8 *%src) {
+; CHECK-LABEL: f10:
+; CHECK: mvc 0(256,%r2), 0(%r3)
+; CHECK: mvc 256(256,%r2), 256(%r3)
+; CHECK: mvc 512(256,%r2), 512(%r3)
+; CHECK: mvc 768(256,%r2), 768(%r3)
+; CHECK: mvc 1024(255,%r2), 1024(%r3)
+; CHECK: br %r14
+  call void @llvm.memcpy.p0i8.p0i8.i64(i8 *%dest, i8 *%src, i64 1279, i32 1,
+                                       i1 false)
+  ret void
+}
+
+; ...and again in cases where not all parts are in range of MVC.
+define void @f11(i8 *%srcbase, i8 *%destbase) {
+; CHECK-LABEL: f11:
+; CHECK: mvc 4000(256,%r2), 3500(%r3)
+; CHECK: lay [[NEWDEST:%r[1-5]]], 4256(%r2)
+; CHECK: mvc 0(256,[[NEWDEST]]), 3756(%r3)
+; CHECK: mvc 256(256,[[NEWDEST]]), 4012(%r3)
+; CHECK: lay [[NEWSRC:%r[1-5]]], 4268(%r3)
+; CHECK: mvc 512(256,[[NEWDEST]]), 0([[NEWSRC]])
+; CHECK: mvc 768(255,[[NEWDEST]]), 256([[NEWSRC]])
+; CHECK: br %r14
+  %dest = getelementptr i8, i8 *%srcbase, i64 4000
+  %src = getelementptr i8, i8* %destbase, i64 3500
+  call void @llvm.memcpy.p0i8.p0i8.i64(i8 *%dest, i8 *%src, i64 1279, i32 1,
+                                       i1 false)
+  ret void
+}
+
+; ...and again with a destination frame base that goes out of range.
+define void @f12() {
+; CHECK-LABEL: f12:
+; CHECK: brasl %r14, foo@PLT
+; CHECK: mvc 4076(256,%r15), 2100(%r15)
+; CHECK: lay [[NEWDEST:%r[1-5]]], 4332(%r15)
+; CHECK: mvc 0(256,[[NEWDEST]]), 2356(%r15)
+; CHECK: mvc 256(256,[[NEWDEST]]), 2612(%r15)
+; CHECK: mvc 512(256,[[NEWDEST]]), 2868(%r15)
+; CHECK: mvc 768(255,[[NEWDEST]]), 3124(%r15)
+; CHECK: brasl %r14, foo@PLT
+; CHECK: br %r14
+  %arr = alloca [6000 x i8]
+  %dest = getelementptr [6000 x i8], [6000 x i8] *%arr, i64 0, i64 3900
+  %src = getelementptr [6000 x i8], [6000 x i8] *%arr, i64 0, i64 1924
+  call void @foo(i8 *%dest, i8 *%src)
+  call void @llvm.memcpy.p0i8.p0i8.i64(i8 *%dest, i8 *%src, i64 1279, i32 1,
+                                       i1 false)
+  call void @foo(i8 *%dest, i8 *%src)
+  ret void
+}
+
+; ...and again with a source frame base that goes out of range.
+define void @f13() {
+; CHECK-LABEL: f13:
+; CHECK: brasl %r14, foo@PLT
+; CHECK: mvc 200(256,%r15), 3826(%r15)
+; CHECK: mvc 456(256,%r15), 4082(%r15)
+; CHECK: lay [[NEWSRC:%r[1-5]]], 4338(%r15)
+; CHECK: mvc 712(256,%r15), 0([[NEWSRC]])
+; CHECK: mvc 968(256,%r15), 256([[NEWSRC]])
+; CHECK: mvc 1224(255,%r15), 512([[NEWSRC]])
+; CHECK: brasl %r14, foo@PLT
+; CHECK: br %r14
+  %arr = alloca [6000 x i8]
+  %dest = getelementptr [6000 x i8], [6000 x i8] *%arr, i64 0, i64 24
+  %src = getelementptr [6000 x i8], [6000 x i8] *%arr, i64 0, i64 3650
+  call void @foo(i8 *%dest, i8 *%src)
+  call void @llvm.memcpy.p0i8.p0i8.i64(i8 *%dest, i8 *%src, i64 1279, i32 1,
+                                       i1 false)
+  call void @foo(i8 *%dest, i8 *%src)
+  ret void
+}
+
+; Test the last case that is done using straight-line code.
+define void @f14(i8 *%dest, i8 *%src) {
+; CHECK-LABEL: f14:
+; CHECK: mvc 0(256,%r2), 0(%r3)
+; CHECK: mvc 256(256,%r2), 256(%r3)
+; CHECK: mvc 512(256,%r2), 512(%r3)
+; CHECK: mvc 768(256,%r2), 768(%r3)
+; CHECK: mvc 1024(256,%r2), 1024(%r3)
+; CHECK: mvc 1280(256,%r2), 1280(%r3)
+; CHECK: br %r14
+  call void @llvm.memcpy.p0i8.p0i8.i64(i8 *%dest, i8 *%src, i64 1536, i32 1,
+                                       i1 false)
+  ret void
+}
+
+; Test the first case that is done using a loop.
+define void @f15(i8 *%dest, i8 *%src) {
+; CHECK-LABEL: f15:
+; CHECK: lghi [[COUNT:%r[0-5]]], 6
+; CHECK: [[LABEL:\.L[^:]*]]:
+; CHECK: pfd 2, 768(%r2)
+; CHECK: mvc 0(256,%r2), 0(%r3)
+; CHECK: la %r2, 256(%r2)
+; CHECK: la %r3, 256(%r3)
+; CHECK: brctg [[COUNT]], [[LABEL]]
+; CHECK: mvc 0(1,%r2), 0(%r3)
+; CHECK: br %r14
+  call void @llvm.memcpy.p0i8.p0i8.i64(i8 *%dest, i8 *%src, i64 1537, i32 1,
+                                       i1 false)
+  ret void
+}
+
+; ...and again with frame bases, where the base must be loaded into a
+; register before the loop.
+define void @f16() {
+; CHECK-LABEL: f16:
+; CHECK: brasl %r14, foo@PLT
+; CHECK-DAG: lghi [[COUNT:%r[0-5]]], 6
+; CHECK-DAG: la [[BASE:%r[0-5]]], 160(%r15)
+; CHECK: [[LABEL:\.L[^:]*]]:
+; CHECK: pfd 2, 2368([[BASE]])
+; CHECK: mvc 1600(256,[[BASE]]), 0([[BASE]])
+; CHECK: la [[BASE]], 256([[BASE]])
+; CHECK: brctg [[COUNT]], [[LABEL]]
+; CHECK: mvc 1600(1,[[BASE]]), 0([[BASE]])
+; CHECK: brasl %r14, foo@PLT
 ; CHECK: br %r14
-  call void @llvm.memcpy.p0i8.p0i8.i64(i8 *%dest, i8 *%src, i64 257, i32 1,
+  %arr = alloca [3200 x i8]
+  %dest = getelementptr [3200 x i8], [3200 x i8] *%arr, i64 0, i64 1600
+  %src = getelementptr [3200 x i8], [3200 x i8] *%arr, i64 0, i64 0
+  call void @foo(i8 *%dest, i8 *%src)
+  call void @llvm.memcpy.p0i8.p0i8.i64(i8 *%dest, i8 *%src, i64 1537, i32 1,
                                        i1 false)
+  call void @foo(i8 *%dest, i8 *%src)
   ret void
 }