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Diffstat (limited to 'test/CodeGen/SystemZ/risbg-03.ll')
-rw-r--r-- | test/CodeGen/SystemZ/risbg-03.ll | 30 |
1 files changed, 30 insertions, 0 deletions
diff --git a/test/CodeGen/SystemZ/risbg-03.ll b/test/CodeGen/SystemZ/risbg-03.ll new file mode 100644 index 0000000..c3c08ad --- /dev/null +++ b/test/CodeGen/SystemZ/risbg-03.ll @@ -0,0 +1,30 @@ +; 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 +} + |