Add regression test for the addcarry crash. See D33770 for context.

llvm-svn: 304414

1 files changed, 23 insertions, 0 deletions

diff --git a/llvm/test/CodeGen/AArch64/addcarry-crash.ll b/llvm/test/CodeGen/AArch64/addcarry-crash.ll
new file mode 100644
index 00000000000..25b7f05444f
--- /dev/null
+++ b/llvm/test/CodeGen/AArch64/addcarry-crash.ll
@@ -0,0 +1,23 @@
+; RUN: llc < %s | FileCheck
+target triple = "arm64-apple-ios7.0"
+
+define i64 @foo(i64* nocapture readonly %ptr, i64 %a, i64 %b, i64 %c) local_unnamed_addr #0 {
+; CHECK: ldr     w8, [x0, #4]
+; CHECK: lsr     x9, x1, #32
+; CHECK: cmn             x3, x2
+; CHECK: mul             x8, x8, x9
+; CHECK: cinc     x0, x8, hs
+; CHECK: ret
+entry:
+  %0 = lshr i64 %a, 32
+  %1 = load i64, i64* %ptr, align 8
+  %2 = lshr i64 %1, 32
+  %3 = mul nuw i64 %2, %0
+  %4 = add i64 %c, %b
+  %5 = icmp ult i64 %4, %c
+  %6 = zext i1 %5 to i64
+  %7 = add i64 %3, %6
+  ret i64 %7
+}
+
+attributes #0 = { norecurse nounwind readonly }