[llvm] 8bdcd0a - [LAA] Add missing test coverage for retrying with runtime checks.
Florian Hahn via llvm-commits
llvm-commits at lists.llvm.org
Thu Mar 27 12:11:39 PDT 2025
Author: Florian Hahn
Date: 2025-03-27T19:09:10Z
New Revision: 8bdcd0a96e65557c8c3bf506d186c49002db6463
URL: https://github.com/llvm/llvm-project/commit/8bdcd0a96e65557c8c3bf506d186c49002db6463
DIFF: https://github.com/llvm/llvm-project/commit/8bdcd0a96e65557c8c3bf506d186c49002db6463.diff
LOG: [LAA] Add missing test coverage for retrying with runtime checks.
Adds extra test coverage showing change by
https://github.com/llvm/llvm-project/pull/128045.
Added:
Modified:
llvm/test/Analysis/LoopAccessAnalysis/retry-runtime-checks-after-dependence-analysis.ll
Removed:
################################################################################
diff --git a/llvm/test/Analysis/LoopAccessAnalysis/retry-runtime-checks-after-dependence-analysis.ll b/llvm/test/Analysis/LoopAccessAnalysis/retry-runtime-checks-after-dependence-analysis.ll
index a15253a901488..114637ea3bf06 100644
--- a/llvm/test/Analysis/LoopAccessAnalysis/retry-runtime-checks-after-dependence-analysis.ll
+++ b/llvm/test/Analysis/LoopAccessAnalysis/retry-runtime-checks-after-dependence-analysis.ll
@@ -316,3 +316,58 @@ loop:
exit:
ret void
}
+
+define void @retry_after_dep_check_with_unknown_offset(ptr %A, i32 %offset) {
+; CHECK-LABEL: 'retry_after_dep_check_with_unknown_offset'
+; 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.A = load float, ptr %A, align 4 ->
+; CHECK-NEXT: store float 0.000000e+00, ptr %A.100.iv.offset.3, align 4
+; CHECK-EMPTY:
+; CHECK-NEXT: Unknown:
+; CHECK-NEXT: %l.A = load float, ptr %A, align 4 ->
+; CHECK-NEXT: store float %l.A, ptr %A.100.iv, align 8
+; CHECK-EMPTY:
+; CHECK-NEXT: Run-time memory checks:
+; CHECK-NEXT: Grouped accesses:
+; CHECK-NEXT: Group [[GRP16:0x[0-9a-f]+]]:
+; CHECK-NEXT: (Low: %A High: (4 + %A))
+; CHECK-NEXT: Member: %A
+; CHECK-NEXT: Group [[GRP17:0x[0-9a-f]+]]:
+; CHECK-NEXT: (Low: (100 + (8 * (zext i32 %offset to i64))<nuw><nsw> + %A) High: (96 + (16 * (zext i32 %offset to i64))<nuw><nsw> + %A))
+; CHECK-NEXT: Member: {(100 + (8 * (zext i32 %offset to i64))<nuw><nsw> + %A),+,8}<%loop>
+; CHECK-NEXT: Group [[GRP18:0x[0-9a-f]+]]:
+; CHECK-NEXT: (Low: (100 + %A) High: (96 + (8 * (zext i32 %offset to i64))<nuw><nsw> + %A))
+; CHECK-NEXT: Member: {(100 + %A),+,8}<%loop>
+; CHECK-EMPTY:
+; CHECK-NEXT: Non vectorizable stores to invariant address were not found in loop.
+; CHECK-NEXT: SCEV assumptions:
+; CHECK-NEXT: {(100 + %A),+,8}<%loop> Added Flags: <nusw>
+; CHECK-NEXT: {(100 + (8 * (zext i32 %offset to i64))<nuw><nsw> + %A),+,8}<%loop> Added Flags: <nusw>
+; CHECK-EMPTY:
+; CHECK-NEXT: Expressions re-written:
+;
+entry:
+ %A.100 = getelementptr i8, ptr %A, i64 100
+ %offset.ext = zext i32 %offset to i64
+ br label %loop
+
+loop:
+ %iv = phi i64 [ 0, %entry ], [ %iv.next, %loop ]
+ %l.A = load float, ptr %A, align 4
+ %A.100.iv = getelementptr { float, float }, ptr %A.100, i64 %iv
+ store float %l.A, ptr %A.100.iv, align 8
+ %iv.offset = add i64 %iv, %offset.ext
+ %iv.offset.3 = shl i64 %iv.offset, 3
+ %A.100.iv.offset.3 = getelementptr i8, ptr %A.100, i64 %iv.offset.3
+ store float 0.0, ptr %A.100.iv.offset.3, align 4
+ %iv.next = add i64 %iv, 1
+ %ec = icmp eq i64 %iv.next, %offset.ext
+ br i1 %ec, label %exit, label %loop
+
+exit:
+ ret void
+}
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