Roll forward r242871

[oota-llvm.git] / test / CodeGen / NVPTX / branch-fold.ll

diff --git a/test/CodeGen/NVPTX/branch-fold.ll b/test/CodeGen/NVPTX/branch-fold.ll
new file mode 100644 (file)
index 0000000..2b9cd0a
--- /dev/null
+++ b/test/CodeGen/NVPTX/branch-fold.ll
@@ -0,0 +1,40 @@
+; RUN: llc < %s -march=nvptx64 -mcpu=sm_35 -disable-cgp | FileCheck %s
+; Disable CGP which also folds branches, so that only BranchFolding is under
+; the spotlight.
+
+target datalayout = "e-i64:64-v16:16-v32:32-n16:32:64"
+target triple = "nvptx64-nvidia-cuda"
+
+define void @foo(i32 %x, float* %output) {
+; CHECK-LABEL: .visible .func foo(
+; CHECK-NOT: bra.uni
+; CHECK-NOT: LBB0_
+  %1 = icmp eq i32 %x, 1
+  br i1 %1, label %then, label %else
+
+then:
+  br label %merge
+
+else:
+  br label %merge
+
+merge:
+  store float 2.0, float* %output
+  ret void
+}
+
+; PR24299. no crash
+define ptx_kernel void @hoge() #0 {
+; CHECK-LABEL: .visible .entry hoge(
+bb:
+  br i1 undef, label %bb1, label %bb4
+
+bb1:                                              ; preds = %bb1, %bb
+  %tmp = phi i64 [ %tmp2, %bb1 ], [ undef, %bb ]
+  %tmp2 = add nsw i64 %tmp, 1
+  %tmp3 = icmp sle i64 %tmp, 0
+  br i1 %tmp3, label %bb1, label %bb4
+
+bb4:                                              ; preds = %bb4, %bb1, %bb
+  br label %bb4
+}