1 files changed, 102 insertions, 0 deletions
diff --git a/test/CodeGen/SystemZ/int-sub-02.ll b/test/CodeGen/SystemZ/int-sub-02.ll
new file mode 100644
index 0000000..5150a96
--- /dev/null
+++ b/test/CodeGen/SystemZ/int-sub-02.ll
@@ -0,0 +1,102 @@
+; Test subtractions of a sign-extended i32 from an i64.
+;
+; RUN: llc < %s -mtriple=s390x-linux-gnu | FileCheck %s
+
+; Check SGFR.
+define i64 @f1(i64 %a, i32 %b) {
+; CHECK: f1:
+; CHECK: sgfr %r2, %r3
+; CHECK: br %r14
+  %bext = sext i32 %b to i64
+  %sub = sub i64 %a, %bext
+  ret i64 %sub
+}
+
+; Check SGF with no displacement.
+define i64 @f2(i64 %a, i32 *%src) {
+; CHECK: f2:
+; CHECK: sgf %r2, 0(%r3)
+; CHECK: br %r14
+  %b = load i32 *%src
+  %bext = sext i32 %b to i64
+  %sub = sub i64 %a, %bext
+  ret i64 %sub
+}
+
+; Check the high end of the aligned SGF range.
+define i64 @f3(i64 %a, i32 *%src) {
+; CHECK: f3:
+; CHECK: sgf %r2, 524284(%r3)
+; CHECK: br %r14
+  %ptr = getelementptr i32 *%src, i64 131071
+  %b = load i32 *%ptr
+  %bext = sext i32 %b to i64
+  %sub = sub i64 %a, %bext
+  ret i64 %sub
+}
+
+; Check the next word up, which needs separate address logic.
+; Other sequences besides this one would be OK.
+define i64 @f4(i64 %a, i32 *%src) {
+; CHECK: f4:
+; CHECK: agfi %r3, 524288
+; CHECK: sgf %r2, 0(%r3)
+; CHECK: br %r14
+  %ptr = getelementptr i32 *%src, i64 131072
+  %b = load i32 *%ptr
+  %bext = sext i32 %b to i64
+  %sub = sub i64 %a, %bext
+  ret i64 %sub
+}
+
+; Check the high end of the negative aligned SGF range.
+define i64 @f5(i64 %a, i32 *%src) {
+; CHECK: f5:
+; CHECK: sgf %r2, -4(%r3)
+; CHECK: br %r14
+  %ptr = getelementptr i32 *%src, i64 -1
+  %b = load i32 *%ptr
+  %bext = sext i32 %b to i64
+  %sub = sub i64 %a, %bext
+  ret i64 %sub
+}
+
+; Check the low end of the SGF range.
+define i64 @f6(i64 %a, i32 *%src) {
+; CHECK: f6:
+; CHECK: sgf %r2, -524288(%r3)
+; CHECK: br %r14
+  %ptr = getelementptr i32 *%src, i64 -131072
+  %b = load i32 *%ptr
+  %bext = sext i32 %b to i64
+  %sub = sub i64 %a, %bext
+  ret i64 %sub
+}
+
+; Check the next word down, which needs separate address logic.
+; Other sequences besides this one would be OK.
+define i64 @f7(i64 %a, i32 *%src) {
+; CHECK: f7:
+; CHECK: agfi %r3, -524292
+; CHECK: sgf %r2, 0(%r3)
+; CHECK: br %r14
+  %ptr = getelementptr i32 *%src, i64 -131073
+  %b = load i32 *%ptr
+  %bext = sext i32 %b to i64
+  %sub = sub i64 %a, %bext
+  ret i64 %sub
+}
+
+; Check that SGF allows an index.
+define i64 @f8(i64 %a, i64 %src, i64 %index) {
+; CHECK: f8:
+; CHECK: sgf %r2, 524284({{%r4,%r3|%r3,%r4}})
+; CHECK: br %r14
+  %add1 = add i64 %src, %index
+  %add2 = add i64 %add1, 524284
+  %ptr = inttoptr i64 %add2 to i32 *
+  %b = load i32 *%ptr
+  %bext = sext i32 %b to i64
+  %sub = sub i64 %a, %bext
+  ret i64 %sub
+}