LV: Don't insert runtime ptr checks on divergent targets

llvm-svn: 309890

1 files changed, 29 insertions, 0 deletions

diff --git a/llvm/test/Transforms/LoopVectorize/AMDGPU/divergent-runtime-check.ll b/llvm/test/Transforms/LoopVectorize/AMDGPU/divergent-runtime-check.ll
new file mode 100644
index 00000000000..91a916798c5
--- /dev/null
+++ b/llvm/test/Transforms/LoopVectorize/AMDGPU/divergent-runtime-check.ll
@@ -0,0 +1,29 @@
+; RUN: opt -S -mtriple=amdgcn-unknown-amdhsa -mcpu=gfx900 -loop-vectorize -simplifycfg < %s | FileCheck -check-prefixes=GCN,GFX9 %s
+; RUN: opt -S -mtriple=amdgcn-unknown-amdhsa -mcpu=gfx900 -loop-vectorize -pass-remarks-analysis='loop-vectorize' < %s 2>&1 | FileCheck -check-prefixes=REMARK %s
+
+; GCN-LABEL: @runtime_check_divergent_target(
+; GCN-NOT: load <2 x half>
+; GCN-NOT: store <2 x half>
+
+; REMARK: remark: <unknown>:0:0: loop not vectorized: runtime pointer checks needed. Not enabled for divergent target
+define amdgpu_kernel void @runtime_check_divergent_target(half addrspace(1)* nocapture %a, half addrspace(1)* nocapture %b) #0 {
+entry:
+  br label %for.body
+
+for.body:                                         ; preds = %entry, %for.body
+  %indvars.iv = phi i64 [ %indvars.iv.next, %for.body ], [ 0, %entry ]
+  %arrayidx = getelementptr inbounds half, half addrspace(1)* %b, i64 %indvars.iv
+  %load = load half, half addrspace(1)* %arrayidx, align 4
+  %mul = fmul half %load, 3.0
+  %arrayidx2 = getelementptr inbounds half, half addrspace(1)* %a, i64 %indvars.iv
+  store half %mul, half addrspace(1)* %arrayidx2, align 4
+  %indvars.iv.next = add i64 %indvars.iv, 1
+  %lftr.wideiv = trunc i64 %indvars.iv.next to i32
+  %exitcond = icmp eq i32 %lftr.wideiv, 1024
+  br i1 %exitcond, label %for.end, label %for.body
+
+for.end:                                          ; preds = %for.body, %entry
+  ret void
+}
+
+attributes #0 = { nounwind }