1 files changed, 71 insertions, 0 deletions
diff --git a/test/CodeGen/SystemZ/fp-conv-02.ll b/test/CodeGen/SystemZ/fp-conv-02.ll
new file mode 100644
index 0000000..f284e1d
--- /dev/null
+++ b/test/CodeGen/SystemZ/fp-conv-02.ll
@@ -0,0 +1,71 @@
+; Test extensions of f32 to f64.
+;
+; RUN: llc < %s -mtriple=s390x-linux-gnu | FileCheck %s
+
+; Check register extension.
+define double @f1(float %val) {
+; CHECK: f1:
+; CHECK: ldebr %f0, %f0
+; CHECK: br %r14
+  %res = fpext float %val to double
+  ret double %res
+}
+
+; Check the low end of the LDEB range.
+define double @f2(float *%ptr) {
+; CHECK: f2:
+; CHECK: ldeb %f0, 0(%r2)
+; CHECK: br %r14
+  %val = load float *%ptr
+  %res = fpext float %val to double
+  ret double %res
+}
+
+; Check the high end of the aligned LDEB range.
+define double @f3(float *%base) {
+; CHECK: f3:
+; CHECK: ldeb %f0, 4092(%r2)
+; CHECK: br %r14
+  %ptr = getelementptr float *%base, i64 1023
+  %val = load float *%ptr
+  %res = fpext float %val to double
+  ret double %res
+}
+
+; Check the next word up, which needs separate address logic.
+; Other sequences besides this one would be OK.
+define double @f4(float *%base) {
+; CHECK: f4:
+; CHECK: aghi %r2, 4096
+; CHECK: ldeb %f0, 0(%r2)
+; CHECK: br %r14
+  %ptr = getelementptr float *%base, i64 1024
+  %val = load float *%ptr
+  %res = fpext float %val to double
+  ret double %res
+}
+
+; Check negative displacements, which also need separate address logic.
+define double @f5(float *%base) {
+; CHECK: f5:
+; CHECK: aghi %r2, -4
+; CHECK: ldeb %f0, 0(%r2)
+; CHECK: br %r14
+  %ptr = getelementptr float *%base, i64 -1
+  %val = load float *%ptr
+  %res = fpext float %val to double
+  ret double %res
+}
+
+; Check that LDEB allows indices.
+define double @f6(float *%base, i64 %index) {
+; CHECK: f6:
+; CHECK: sllg %r1, %r3, 2
+; CHECK: ldeb %f0, 400(%r1,%r2)
+; CHECK: br %r14
+  %ptr1 = getelementptr float *%base, i64 %index
+  %ptr2 = getelementptr float *%ptr1, i64 100
+  %val = load float *%ptr2
+  %res = fpext float %val to double
+  ret double %res
+}