1 files changed, 87 insertions, 0 deletions
diff --git a/test/CodeGen/SystemZ/bswap-02.ll b/test/CodeGen/SystemZ/bswap-02.ll
new file mode 100644
index 000000000000..e9b7eb5f055b
--- /dev/null
+++ b/test/CodeGen/SystemZ/bswap-02.ll
@@ -0,0 +1,87 @@
+; Test 32-bit byteswaps from memory to registers.
+;
+; RUN: llc < %s -mtriple=s390x-linux-gnu | FileCheck %s
+
+declare i32 @llvm.bswap.i32(i32 %a)
+
+; Check LRV with no displacement.
+define i32 @f1(i32 *%src) {
+; CHECK: f1:
+; CHECK: lrv %r2, 0(%r2)
+; CHECK: br %r14
+  %a = load i32 *%src
+  %swapped = call i32 @llvm.bswap.i32(i32 %a)
+  ret i32 %swapped
+}
+
+; Check the high end of the aligned LRV range.
+define i32 @f2(i32 *%src) {
+; CHECK: f2:
+; CHECK: lrv %r2, 524284(%r2)
+; CHECK: br %r14
+  %ptr = getelementptr i32 *%src, i64 131071
+  %a = load i32 *%ptr
+  %swapped = call i32 @llvm.bswap.i32(i32 %a)
+  ret i32 %swapped
+}
+
+; Check the next word up, which needs separate address logic.
+; Other sequences besides this one would be OK.
+define i32 @f3(i32 *%src) {
+; CHECK: f3:
+; CHECK: agfi %r2, 524288
+; CHECK: lrv %r2, 0(%r2)
+; CHECK: br %r14
+  %ptr = getelementptr i32 *%src, i64 131072
+  %a = load i32 *%ptr
+  %swapped = call i32 @llvm.bswap.i32(i32 %a)
+  ret i32 %swapped
+}
+
+; Check the high end of the negative aligned LRV range.
+define i32 @f4(i32 *%src) {
+; CHECK: f4:
+; CHECK: lrv %r2, -4(%r2)
+; CHECK: br %r14
+  %ptr = getelementptr i32 *%src, i64 -1
+  %a = load i32 *%ptr
+  %swapped = call i32 @llvm.bswap.i32(i32 %a)
+  ret i32 %swapped
+}
+
+; Check the low end of the LRV range.
+define i32 @f5(i32 *%src) {
+; CHECK: f5:
+; CHECK: lrv %r2, -524288(%r2)
+; CHECK: br %r14
+  %ptr = getelementptr i32 *%src, i64 -131072
+  %a = load i32 *%ptr
+  %swapped = call i32 @llvm.bswap.i32(i32 %a)
+  ret i32 %swapped
+}
+
+; Check the next word down, which needs separate address logic.
+; Other sequences besides this one would be OK.
+define i32 @f6(i32 *%src) {
+; CHECK: f6:
+; CHECK: agfi %r2, -524292
+; CHECK: lrv %r2, 0(%r2)
+; CHECK: br %r14
+  %ptr = getelementptr i32 *%src, i64 -131073
+  %a = load i32 *%ptr
+  %swapped = call i32 @llvm.bswap.i32(i32 %a)
+  ret i32 %swapped
+}
+
+; Check that LRV allows an index.
+define i32 @f7(i64 %src, i64 %index) {
+; CHECK: f7:
+; CHECK: lrv %r2, 524287({{%r3,%r2|%r2,%r3}})
+; CHECK: br %r14
+  %add1 = add i64 %src, %index
+  %add2 = add i64 %add1, 524287
+  %ptr = inttoptr i64 %add2 to i32 *
+  %a = load i32 *%ptr
+  %swapped = call i32 @llvm.bswap.i32(i32 %a)
+  ret i32 %swapped
+}