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-rw-r--r--llvm/test/Transforms/LoopUnroll/AArch64/full-unroll-trip-count-upper-bound.ll43
1 files changed, 43 insertions, 0 deletions
diff --git a/llvm/test/Transforms/LoopUnroll/AArch64/full-unroll-trip-count-upper-bound.ll b/llvm/test/Transforms/LoopUnroll/AArch64/full-unroll-trip-count-upper-bound.ll
new file mode 100644
index 00000000000..5c70a2668db
--- /dev/null
+++ b/llvm/test/Transforms/LoopUnroll/AArch64/full-unroll-trip-count-upper-bound.ll
@@ -0,0 +1,43 @@
+; RUN: opt -loop-unroll -S -mtriple aarch64 -mcpu=cortex-a57 %s | FileCheck %s -check-prefix=UNROLL
+; RUN: opt -loop-unroll -unroll-max-upperbound=0 -S -mtriple aarch64 -mcpu=cortex-a57 %s | FileCheck %s -check-prefix=NOUNROLL
+
+; This IR comes from this C code:
+;
+; for (int i = 0; i < 4; i++) {
+; if (src[i] == 1) {
+; *dst = i;
+; break;
+; }
+; }
+;
+; This test is meant to check that this loop is unrolled into four iterations.
+
+; UNROLL-LABEL: @test
+; UNROLL: load i32, i32*
+; UNROLL: load i32, i32*
+; UNROLL: load i32, i32*
+; UNROLL: load i32, i32*
+; UNROLL-NOT: load i32, i32*
+; NOUNROLL-LABEL: @test
+; NOUNROLL: load i32, i32*
+; NOUNROLL-NOT: load i32, i32*
+
+define void @test(i32* %dst, i32* %src) {
+entry:
+ br label %for.body
+
+for.body: ; preds = %entry, %for.body
+ %i = phi i32 [ 0, %entry ], [ %inc, %for.body ]
+ %0 = sext i32 %i to i64
+ %1 = getelementptr inbounds i32, i32* %src, i64 %0
+ %2 = load i32, i32* %1
+ %inc = add nsw i32 %i, 1
+ %cmp1 = icmp slt i32 %inc, 4
+ %cmp3 = icmp eq i32 %2, 1
+ %or.cond = and i1 %cmp3, %cmp1
+ br i1 %or.cond, label %for.body, label %exit
+
+exit: ; preds = %for.body
+ store i32 %i, i32* %dst
+ ret void
+}
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