1 files changed, 30 insertions, 0 deletions
diff --git a/test/CodeGen/SystemZ/risbg-03.ll b/test/CodeGen/SystemZ/risbg-03.ll
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+++ b/test/CodeGen/SystemZ/risbg-03.ll
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+; Test use of RISBG vs RISBGN on zEC12.
+;
+; RUN: llc < %s -mtriple=s390x-linux-gnu -mcpu=zEC12 | FileCheck %s
+
+; On zEC12, we generally prefer RISBGN.
+define i64 @f1(i64 %a, i64 %b) {
+; CHECK-LABEL: f1:
+; CHECK: risbgn %r2, %r3, 60, 62, 0
+; CHECK: br %r14
+  %anda = and i64 %a, -15
+  %andb = and i64 %b, 14
+  %or = or i64 %anda, %andb
+  ret i64 %or
+}
+
+; But we may fall back to RISBG if we can use the condition code.
+define i64 @f2(i64 %a, i64 %b, i32* %c) {
+; CHECK-LABEL: f2:
+; CHECK: risbg %r2, %r3, 60, 62, 0
+; CHECK-NEXT: ipm
+; CHECK: br %r14
+  %anda = and i64 %a, -15
+  %andb = and i64 %b, 14
+  %or = or i64 %anda, %andb
+  %cmp = icmp sgt i64 %or, 0
+  %conv = zext i1 %cmp to i32
+  store i32 %conv, i32* %c, align 4
+  ret i64 %or
+}
+