[llvm] d108fa0 - [LAA] Add tests with invariant accesses using vector types.

[Florian Hahn via llvm-commits]

Author: Florian Hahn
Date: 2024-05-20T14:53:23+01:00
New Revision: d108fa03d4ac1a2634fa0a1e9b3058f4196f261c

URL: https://github.com/llvm/llvm-project/commit/d108fa03d4ac1a2634fa0a1e9b3058f4196f261c
DIFF: https://github.com/llvm/llvm-project/commit/d108fa03d4ac1a2634fa0a1e9b3058f4196f261c.diff

LOG: [LAA] Add tests with invariant accesses using vector types.

Extra tests for https://github.com/llvm/llvm-project/pull/92307

Added: 
    

Modified: 
    llvm/test/Analysis/LoopAccessAnalysis/invariant-dependence-before.ll

Removed: 
    


################################################################################
diff  --git a/llvm/test/Analysis/LoopAccessAnalysis/invariant-dependence-before.ll b/llvm/test/Analysis/LoopAccessAnalysis/invariant-dependence-before.ll
index 2a210a5a445b9..1e16d89f69171 100644
--- a/llvm/test/Analysis/LoopAccessAnalysis/invariant-dependence-before.ll
+++ b/llvm/test/Analysis/LoopAccessAnalysis/invariant-dependence-before.ll
@@ -754,3 +754,73 @@ loop:
 exit:
   ret void
 }
+
+define void @test_invar_vector_dependence_before_positive_strided_access_1(ptr %a) {
+; CHECK-LABEL: 'test_invar_vector_dependence_before_positive_strided_access_1'
+; CHECK-NEXT:    loop:
+; CHECK-NEXT:      Report: unsafe dependent memory operations in loop. Use #pragma clang loop distribute(enable) to allow loop distribution to attempt to isolate the offending operations into a separate loop
+; CHECK-NEXT:  Unknown data dependence.
+; CHECK-NEXT:      Dependences:
+; CHECK-NEXT:        Unknown:
+; CHECK-NEXT:            %l = load <4 x i8>, ptr %a, align 4 ->
+; CHECK-NEXT:            store i32 0, ptr %gep, align 4
+; CHECK-EMPTY:
+; CHECK-NEXT:      Run-time memory checks:
+; CHECK-NEXT:      Grouped accesses:
+; CHECK-EMPTY:
+; CHECK-NEXT:      Non vectorizable stores to invariant address were not found in loop.
+; CHECK-NEXT:      SCEV assumptions:
+; CHECK-EMPTY:
+; CHECK-NEXT:      Expressions re-written:
+;
+entry:
+  %gep.off = getelementptr i8, ptr %a, i32 4
+  br label %loop
+
+loop:
+  %iv = phi i32 [ 0, %entry ], [ %iv.next, %loop ]
+  %gep = getelementptr i32, ptr %gep.off, i32 %iv
+  %l = load <4 x i8>, ptr %a
+  store i32 0, ptr %gep
+  %iv.next = add i32 %iv, 1
+  %ec = icmp eq i32 %iv.next, 100
+  br i1 %ec, label %exit, label %loop
+
+exit:
+  ret void
+}
+
+define void @test_invar_scalable_dependence_before_positive_strided_access_1(ptr %a) {
+; CHECK-LABEL: 'test_invar_scalable_dependence_before_positive_strided_access_1'
+; CHECK-NEXT:    loop:
+; CHECK-NEXT:      Report: unsafe dependent memory operations in loop. Use #pragma clang loop distribute(enable) to allow loop distribution to attempt to isolate the offending operations into a separate loop
+; CHECK-NEXT:  Unknown data dependence.
+; CHECK-NEXT:      Dependences:
+; CHECK-NEXT:        Unknown:
+; CHECK-NEXT:            %l = load <vscale x 4 x i8>, ptr %a, align 4 ->
+; CHECK-NEXT:            store i32 0, ptr %gep, align 4
+; CHECK-EMPTY:
+; CHECK-NEXT:      Run-time memory checks:
+; CHECK-NEXT:      Grouped accesses:
+; CHECK-EMPTY:
+; CHECK-NEXT:      Non vectorizable stores to invariant address were not found in loop.
+; CHECK-NEXT:      SCEV assumptions:
+; CHECK-EMPTY:
+; CHECK-NEXT:      Expressions re-written:
+;
+entry:
+  %gep.off = getelementptr i8, ptr %a, i32 4
+  br label %loop
+
+loop:
+  %iv = phi i32 [ 0, %entry ], [ %iv.next, %loop ]
+  %gep = getelementptr i32, ptr %gep.off, i32 %iv
+  %l = load <vscale x 4 x i8>, ptr %a
+  store i32 0, ptr %gep
+  %iv.next = add i32 %iv, 1
+  %ec = icmp eq i32 %iv.next, 100
+  br i1 %ec, label %exit, label %loop
+
+exit:
+  ret void
+}