Imported Upstream version 5.18.0.246

Former-commit-id: 0c7ce5b1a7851e13f22acfd379b7f9fb304e4833

external/llvm/test/CodeGen/NVPTX/nounroll.ll

@@ -0,0 +1,37 @@
+; RUN: llc < %s -march=nvptx64 -mcpu=sm_20 | FileCheck %s
+
+target datalayout = "e-i64:64-v16:16-v32:32-n16:32:64"
+target triple = "nvptx64-unknown-unknown"
+
+; Compiled from the following CUDA code:
+;
+;   #pragma nounroll
+;   for (int i = 0; i < 2; ++i)
+;     output[i] = input[i];
+define void @nounroll(float* %input, float* %output) {
+; CHECK-LABEL: .visible .func nounroll(
+entry:
+  br label %for.body
+
+for.body:
+; CHECK: .pragma "nounroll"
+  %i.06 = phi i32 [ 0, %entry ], [ %inc, %for.body ]
+  %idxprom = sext i32 %i.06 to i64
+  %arrayidx = getelementptr inbounds float, float* %input, i64 %idxprom
+  %0 = load float, float* %arrayidx, align 4
+; CHECK: ld.f32
+  %arrayidx2 = getelementptr inbounds float, float* %output, i64 %idxprom
+  store float %0, float* %arrayidx2, align 4
+; CHECK: st.f32
+  %inc = add nuw nsw i32 %i.06, 1
+  %exitcond = icmp eq i32 %inc, 2
+  br i1 %exitcond, label %for.end, label %for.body, !llvm.loop !0
+; CHECK-NOT: ld.f32
+; CHECK-NOT: st.f32
+
+for.end:
+  ret void
+}
+
+!0 = distinct !{!0, !1}
+!1 = !{!"llvm.loop.unroll.disable"}