vendor/llvm/llvm-release_33-r183502

1 files changed, 42 insertions, 0 deletions

diff --git a/test/CodeGen/SystemZ/int-neg-01.ll b/test/CodeGen/SystemZ/int-neg-01.ll
new file mode 100644
index 0000000000000..6114f4efbc9ac
--- /dev/null
+++ b/test/CodeGen/SystemZ/int-neg-01.ll
@@ -0,0 +1,42 @@
+; Test integer negation.
+;
+; RUN: llc < %s -mtriple=s390x-linux-gnu | FileCheck %s
+
+; Test i32->i32 negation.
+define i32 @f1(i32 %val) {
+; CHECK: f1:
+; CHECK: lcr %r2, %r2
+; CHECK: br %r14
+  %neg = sub i32 0, %val
+  ret i32 %neg
+}
+
+; Test i32->i64 negation.
+define i64 @f2(i32 %val) {
+; CHECK: f2:
+; CHECK: lcgfr %r2, %r2
+; CHECK: br %r14
+  %ext = sext i32 %val to i64
+  %neg = sub i64 0, %ext
+  ret i64 %neg
+}
+
+; Test i32->i64 negation that uses an "in-register" form of sign extension.
+define i64 @f3(i64 %val) {
+; CHECK: f3:
+; CHECK: lcgfr %r2, %r2
+; CHECK: br %r14
+  %trunc = trunc i64 %val to i32
+  %ext = sext i32 %trunc to i64
+  %neg = sub i64 0, %ext
+  ret i64 %neg
+}
+
+; Test i64 negation.
+define i64 @f4(i64 %val) {
+; CHECK: f4:
+; CHECK: lcgr %r2, %r2
+; CHECK: br %r14
+  %neg = sub i64 0, %val
+  ret i64 %neg
+}