[Hexagon] Generate loop1 instruction for nested loops
loop1 is for the outer loop and loop0 is for the inner loop.
Differential Revision: http://reviews.llvm.org/D9680
llvm-svn: 237266
diff --git a/llvm/test/CodeGen/Hexagon/hwloop-loop1.ll b/llvm/test/CodeGen/Hexagon/hwloop-loop1.ll
new file mode 100644
index 0000000..8b02736
--- /dev/null
+++ b/llvm/test/CodeGen/Hexagon/hwloop-loop1.ll
@@ -0,0 +1,68 @@
+; RUN: llc -march=hexagon -mcpu=hexagonv5 < %s | FileCheck %s
+;
+; Generate loop1 instruction for double loop sequence.
+
+; CHECK: loop0(.LBB{{.}}_{{.}}, #100)
+; CHECK: endloop0
+; CHECK: loop1(.LBB{{.}}_{{.}}, #100)
+; CHECK: loop0(.LBB{{.}}_{{.}}, #100)
+; CHECK: endloop0
+; CHECK: endloop1
+
+define i32 @main() #0 {
+entry:
+ %array = alloca [100 x i32], align 8
+ %doublearray = alloca [100 x [100 x i32]], align 8
+ %0 = bitcast [100 x i32]* %array to i8*
+ call void @llvm.lifetime.start(i64 400, i8* %0) #1
+ %1 = bitcast [100 x [100 x i32]]* %doublearray to i8*
+ call void @llvm.lifetime.start(i64 40000, i8* %1) #1
+ %arrayidx1 = getelementptr inbounds [100 x [100 x i32]], [100 x [100 x i32]]* %doublearray, i32 0, i32 10, i32 10
+ %arrayidx2.gep = getelementptr [100 x i32], [100 x i32]* %array, i32 0, i32 0
+ br label %for.body
+
+for.body:
+ %2 = phi i32 [ undef, %entry ], [ %.pre, %for.body.for.body_crit_edge ]
+ %sum.031 = phi i32 [ undef, %entry ], [ %add, %for.body.for.body_crit_edge ]
+ %arrayidx2.phi = phi i32* [ %arrayidx2.gep, %entry ], [ %arrayidx2.inc, %for.body.for.body_crit_edge ]
+ %i.030 = phi i32 [ 1, %entry ], [ %phitmp, %for.body.for.body_crit_edge ]
+ %add = add nsw i32 %2, %sum.031
+ %exitcond33 = icmp eq i32 %i.030, 100
+ %arrayidx2.inc = getelementptr i32, i32* %arrayidx2.phi, i32 1
+ br i1 %exitcond33, label %for.cond7.preheader.preheader, label %for.body.for.body_crit_edge
+
+for.cond7.preheader.preheader:
+ br label %for.cond7.preheader
+
+for.body.for.body_crit_edge:
+ %.pre = load i32, i32* %arrayidx2.inc, align 4
+ %phitmp = add i32 %i.030, 1
+ br label %for.body
+
+for.cond7.preheader:
+ %i.129 = phi i32 [ %inc16, %for.inc15 ], [ 0, %for.cond7.preheader.preheader ]
+ br label %for.body9
+
+for.body9:
+ %j.028 = phi i32 [ 0, %for.cond7.preheader ], [ %inc13, %for.body9 ]
+ %arrayidx11 = getelementptr inbounds [100 x [100 x i32]], [100 x [100 x i32]]* %doublearray, i32 0, i32 %i.129, i32 %j.028
+ store i32 %add, i32* %arrayidx11, align 4
+ %inc13 = add nsw i32 %j.028, 1
+ %exitcond = icmp eq i32 %inc13, 100
+ br i1 %exitcond, label %for.inc15, label %for.body9
+
+for.inc15:
+ %inc16 = add nsw i32 %i.129, 1
+ %exitcond32 = icmp eq i32 %inc16, 100
+ br i1 %exitcond32, label %for.end17, label %for.cond7.preheader
+
+for.end17:
+ %3 = load i32, i32* %arrayidx1, align 8
+ call void @llvm.lifetime.end(i64 40000, i8* %1) #1
+ call void @llvm.lifetime.end(i64 400, i8* %0) #1
+ ret i32 %3
+}
+
+declare void @llvm.lifetime.start(i64, i8* nocapture) #1
+
+declare void @llvm.lifetime.end(i64, i8* nocapture) #1