[llvm] 2733088 - [LoopUnroll] Add cache verification failure test case.

[Florian Hahn via llvm-commits]

Author: Florian Hahn
Date: 2022-09-26T14:25:37+01:00
New Revision: 27330882a16f76f0d7a9d4f30df2a87c225c1553

URL: https://github.com/llvm/llvm-project/commit/27330882a16f76f0d7a9d4f30df2a87c225c1553
DIFF: https://github.com/llvm/llvm-project/commit/27330882a16f76f0d7a9d4f30df2a87c225c1553.diff

LOG: [LoopUnroll] Add cache verification failure test case.

Test case for D134612.

Added: 
    llvm/test/Transforms/LoopUnroll/loop-block-disposition-after-full-unroll.ll

Modified: 
    

Removed: 
    


################################################################################
diff  --git a/llvm/test/Transforms/LoopUnroll/loop-block-disposition-after-full-unroll.ll b/llvm/test/Transforms/LoopUnroll/loop-block-disposition-after-full-unroll.ll
new file mode 100644
index 0000000000000..788fa2b0cee81
--- /dev/null
+++ b/llvm/test/Transforms/LoopUnroll/loop-block-disposition-after-full-unroll.ll
@@ -0,0 +1,53 @@
+; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
+; RUN: opt -passes='loop(indvars,loop-deletion,loop-unroll-full),verify<scalar-evolution>' -S %s | FileCheck %s
+
+define void @test(i1 %c.0, ptr %A) {
+; CHECK-LABEL: @test(
+; CHECK-NEXT:  entry:
+; CHECK-NEXT:    br i1 [[C_0:%.*]], label [[LOOP_1_HEADER_PREHEADER:%.*]], label [[OUTER_HEADER_PREHEADER:%.*]]
+; CHECK:       outer.header.preheader:
+; CHECK-NEXT:    br label [[OUTER_HEADER:%.*]]
+; CHECK:       loop.1.header.preheader:
+; CHECK-NEXT:    br label [[LOOP_1_HEADER:%.*]]
+; CHECK:       loop.1.header:
+; CHECK-NEXT:    store i32 0, ptr [[A:%.*]], align 4
+; CHECK-NEXT:    br label [[LOOP_1_LATCH:%.*]]
+; CHECK:       loop.1.latch:
+; CHECK-NEXT:    store i32 0, ptr [[A]], align 4
+; CHECK-NEXT:    br label [[LOOP_1_LATCH_1:%.*]]
+; CHECK:       loop.1.latch.1:
+; CHECK-NEXT:    ret void
+; CHECK:       outer.header.loopexit:
+; CHECK-NEXT:    br label [[OUTER_HEADER]]
+; CHECK:       outer.header:
+; CHECK-NEXT:    [[L:%.*]] = load i32, ptr [[A]], align 4
+; CHECK-NEXT:    br label [[OUTER_HEADER_LOOPEXIT:%.*]]
+;
+entry:
+  br i1 %c.0, label %loop.1.header, label %outer.header
+
+loop.1.header:
+  %iv.1 = phi i32 [ 0, %entry ],  [ 1, %loop.1.latch ]
+  store i32 0, ptr %A, align 4
+  br label %loop.1.latch
+
+loop.1.latch:
+  %cmp.1 = icmp eq i32 %iv.1, 0
+  br i1 %cmp.1, label %loop.1.header, label %exit
+
+outer.header:
+  %l = load i32, ptr %A, align 4
+  br label %inner.header
+
+inner.header:
+  %iv.2 = phi i32 [ 0, %outer.header ], [ %iv.2.next, %inner.outer.latch ]
+  %cmp.2 = icmp eq i32 %iv.2, %l
+  br i1 %cmp.2, label %inner.outer.latch, label %inner.outer.latch
+
+inner.outer.latch:
+  %iv.2.next = add nuw nsw i32 %iv.2, 1
+  br i1 false, label %inner.header, label %outer.header
+
+exit:
+  ret void
+}