Vendor import of llvm trunk r238337:vendor/llvm/llvm-trunk-r238337

https://llvm.org/svn/llvm-project/llvm/trunk@238337

1 files changed, 30 insertions, 0 deletions

diff --git a/test/CodeGen/SystemZ/int-cmp-50.ll b/test/CodeGen/SystemZ/int-cmp-50.ll
new file mode 100644
index 000000000000..287ac2c49a78
--- /dev/null
+++ b/test/CodeGen/SystemZ/int-cmp-50.ll
@@ -0,0 +1,30 @@
+; Verify that we do not crash on always-true conditions
+;
+; RUN: llc < %s -mtriple=s390x-linux-gnu -mcpu=z10 -O0
+;
+; This test was compiled using clang -O0 from the following source code:
+;
+; int test(unsigned long x)
+; {
+;   return x >= 0 && x <= 15;
+; }
+
+define signext i32 @test(i64 %x) {
+entry:
+  %x.addr = alloca i64, align 8
+  store i64 %x, i64* %x.addr, align 8
+  %0 = load i64, i64* %x.addr, align 8
+  %cmp = icmp uge i64 %0, 0
+  br i1 %cmp, label %land.rhs, label %land.end
+
+land.rhs:                                         ; preds = %entry
+  %1 = load i64, i64* %x.addr, align 8
+  %cmp1 = icmp ule i64 %1, 15
+  br label %land.end
+
+land.end:                                         ; preds = %land.rhs, %entry
+  %2 = phi i1 [ false, %entry ], [ %cmp1, %land.rhs ]
+  %land.ext = zext i1 %2 to i32
+  ret i32 %land.ext
+}
+