[LoopInterchange] Split up interchange.ll test case (NFC).
Summary:
Currently most tests for the loop interchange pass are in
test/Transforms/LoopInterchange/interchange.ll. This patch splits up the
large test file in smaller pieces, which makes debugging test failures
easier.
Reviewers: karthikthecool, blitz.opensource, hfinkel
Reviewed By: hfinkel
Subscribers: hfinkel, mcrosier, mkuper, mzolotukhin, mssimpso, llvm-commits
Differential Revision: https://reviews.llvm.org/D35488
llvm-svn: 308284
diff --git a/llvm/test/Transforms/LoopInterchange/interchange-output-dependencies.ll b/llvm/test/Transforms/LoopInterchange/interchange-output-dependencies.ll
new file mode 100644
index 0000000..98deba9
--- /dev/null
+++ b/llvm/test/Transforms/LoopInterchange/interchange-output-dependencies.ll
@@ -0,0 +1,86 @@
+; RUN: opt < %s -basicaa -loop-interchange -S | FileCheck %s
+;; We test the complete .ll for adjustment in outer loop header/latch and inner loop header/latch.
+
+target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"
+target triple = "x86_64-unknown-linux-gnu"
+
+@A = common global [100 x [100 x i32]] zeroinitializer
+
+;; Test to make sure we can handle output dependencies.
+;;
+;; for (int i = 0; i < 2; ++i)
+;; for(int j = 0; j < 3; ++j) {
+;; A[j][i] = i;
+;; A[j][i+1] = j;
+;; }
+
+@A10 = local_unnamed_addr global [3 x [3 x i32]] zeroinitializer, align 16
+
+define void @interchange_10() {
+entry:
+ br label %for.cond1.preheader
+
+for.cond.loopexit: ; preds = %for.body4
+ %exitcond28 = icmp ne i64 %indvars.iv.next27, 2
+ br i1 %exitcond28, label %for.cond1.preheader, label %for.cond.cleanup
+
+for.cond1.preheader: ; preds = %for.cond.loopexit, %entry
+ %indvars.iv26 = phi i64 [ 0, %entry ], [ %indvars.iv.next27, %for.cond.loopexit ]
+ %indvars.iv.next27 = add nuw nsw i64 %indvars.iv26, 1
+ br label %for.body4
+
+for.cond.cleanup: ; preds = %for.cond.loopexit
+ ret void
+
+for.body4: ; preds = %for.body4, %for.cond1.preheader
+ %indvars.iv = phi i64 [ 0, %for.cond1.preheader ], [ %indvars.iv.next, %for.body4 ]
+ %arrayidx6 = getelementptr inbounds [3 x [3 x i32]], [3 x [3 x i32]]* @A10, i64 0, i64 %indvars.iv, i64 %indvars.iv26
+ %tmp = trunc i64 %indvars.iv26 to i32
+ store i32 %tmp, i32* %arrayidx6, align 4
+ %arrayidx10 = getelementptr inbounds [3 x [3 x i32]], [3 x [3 x i32]]* @A10, i64 0, i64 %indvars.iv, i64 %indvars.iv.next27
+ %tmp1 = trunc i64 %indvars.iv to i32
+ store i32 %tmp1, i32* %arrayidx10, align 4
+ %indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
+ %exitcond = icmp ne i64 %indvars.iv.next, 3
+ br i1 %exitcond, label %for.body4, label %for.cond.loopexit
+}
+
+; CHECK-LABEL: @interchange_10
+; CHECK: entry:
+; CHECK: br label %for.body4.preheader
+
+; CHECK: for.cond1.preheader.preheader:
+; CHECK: br label %for.cond1.preheader
+
+; CHECK: for.cond.loopexit:
+; CHECK: %exitcond28 = icmp ne i64 %indvars.iv.next27, 2
+; CHECK: br i1 %exitcond28, label %for.cond1.preheader, label %for.body4.split
+
+; CHECK: for.cond1.preheader:
+; CHECK: %indvars.iv26 = phi i64 [ %indvars.iv.next27, %for.cond.loopexit ], [ 0, %for.cond1.preheader.preheader ]
+; CHECK: %indvars.iv.next27 = add nuw nsw i64 %indvars.iv26, 1
+; CHECK: br label %for.body4.split1
+
+; CHECK: for.body4.preheader:
+; CHECK: br label %for.body4
+
+; CHECK: for.cond.cleanup:
+; CHECK: ret void
+
+; CHECK: for.body4:
+; CHECK: %indvars.iv = phi i64 [ %indvars.iv.next, %for.body4.split ], [ 0, %for.body4.preheader ]
+; CHECK: br label %for.cond1.preheader.preheader
+
+; CHECK: for.body4.split1:
+; CHECK: %arrayidx6 = getelementptr inbounds [3 x [3 x i32]], [3 x [3 x i32]]* @A10, i64 0, i64 %indvars.iv, i64 %indvars.iv26
+; CHECK: %tmp = trunc i64 %indvars.iv26 to i32
+; CHECK: store i32 %tmp, i32* %arrayidx6, align 4
+; CHECK: %arrayidx10 = getelementptr inbounds [3 x [3 x i32]], [3 x [3 x i32]]* @A10, i64 0, i64 %indvars.iv, i64 %indvars.iv.next27
+; CHECK: %tmp1 = trunc i64 %indvars.iv to i32
+; CHECK: store i32 %tmp1, i32* %arrayidx10, align 4
+; CHECK: br label %for.cond.loopexit
+
+; CHECK: for.body4.split:
+; CHECK: %indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
+; CHECK: %exitcond = icmp ne i64 %indvars.iv.next, 3
+; CHECK: br i1 %exitcond, label %for.body4, label %for.cond.cleanup