FileCheck'ize and expand LDA testcases.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@76880 91177308-0d34-0410-b5e6-96231b3b80d8

10 files changed, 292 insertions, 137 deletions

diff --git a/test/Analysis/LoopDependenceAnalysis/alias.ll b/test/Analysis/LoopDependenceAnalysis/alias.ll
new file mode 100644
index 0000000000..6c613269bd
--- /dev/null
+++ b/test/Analysis/LoopDependenceAnalysis/alias.ll
@@ -0,0 +1,44 @@
+; RUN: llvm-as < %s | opt -disable-output -analyze -lda | FileCheck %s
+
+; x[5] = x[6] // with x being a pointer passed as argument
+
+define void @f1(i32* nocapture %xptr) nounwind {
+entry:
+  %x.ld.addr = getelementptr i32* %xptr, i64 6
+  %x.st.addr = getelementptr i32* %xptr, i64 5
+  br label %for.body
+
+for.body:
+  %i = phi i64 [ 0, %entry ], [ %i.next, %for.body ]
+  %x = load i32* %x.ld.addr
+  store i32 %x, i32* %x.st.addr
+; CHECK: 0,1: dep
+  %i.next = add i64 %i, 1
+  %exitcond = icmp eq i64 %i.next, 256
+  br i1 %exitcond, label %for.end, label %for.body
+
+for.end:
+  ret void
+}
+
+; x[5] = x[6] // with x being an array on the stack
+
+define void @foo(...) nounwind {
+entry:
+  %xptr = alloca [256 x i32], align 4
+  %x.ld.addr = getelementptr [256 x i32]* %xptr, i64 0, i64 6
+  %x.st.addr = getelementptr [256 x i32]* %xptr, i64 0, i64 5
+  br label %for.body
+
+for.body:
+  %i = phi i64 [ 0, %entry ], [ %i.next, %for.body ]
+  %x = load i32* %x.ld.addr
+  store i32 %x, i32* %x.st.addr
+; CHECK: 0,1: dep
+  %i.next = add i64 %i, 1
+  %exitcond = icmp eq i64 %i.next, 256
+  br i1 %exitcond, label %for.end, label %for.body
+
+for.end:
+  ret void
+}
diff --git a/test/Analysis/LoopDependenceAnalysis/local-array.ll b/test/Analysis/LoopDependenceAnalysis/local-array.ll
deleted file mode 100644
index c42e0fad43..0000000000
--- a/test/Analysis/LoopDependenceAnalysis/local-array.ll
+++ /dev/null
@@ -1,24 +0,0 @@
-; RUN: llvm-as < %s | opt -disable-output -analyze -lda > %t
-; RUN: grep {instructions: 2} %t | count 1
-; RUN: grep {0,1: dependent} %t | count 1
-
-; x[5] = x[6] // with x being an array on the stack
-
-define void @foo(...) nounwind {
-entry:
-  %xptr = alloca [256 x i32], align 4
-  %x.ld.addr = getelementptr [256 x i32]* %xptr, i64 0, i64 6
-  %x.st.addr = getelementptr [256 x i32]* %xptr, i64 0, i64 5
-  br label %for.body
-
-for.body:
-  %i = phi i64 [ 0, %entry ], [ %i.next, %for.body ]
-  %x = load i32* %x.ld.addr
-  store i32 %x, i32* %x.st.addr
-  %i.next = add i64 %i, 1
-  %exitcond = icmp eq i64 %i.next, 256
-  br i1 %exitcond, label %for.end, label %for.body
-
-for.end:
-  ret void
-}
diff --git a/test/Analysis/LoopDependenceAnalysis/no-array.ll b/test/Analysis/LoopDependenceAnalysis/no-array.ll
deleted file mode 100644
index 03b9f4d8b8..0000000000
--- a/test/Analysis/LoopDependenceAnalysis/no-array.ll
+++ /dev/null
@@ -1,23 +0,0 @@
-; RUN: llvm-as < %s | opt -disable-output -analyze -lda > %t
-; RUN: grep {instructions: 2} %t | count 1
-; RUN: grep {0,1: dependent} %t | count 1
-
-; x[5] = x[6] // with x being a pointer passed as argument
-
-define void @foo(i32* nocapture %xptr) nounwind {
-entry:
-  %x.ld.addr = getelementptr i32* %xptr, i64 6
-  %x.st.addr = getelementptr i32* %xptr, i64 5
-  br label %for.body
-
-for.body:
-  %i = phi i64 [ 0, %entry ], [ %i.next, %for.body ]
-  %x = load i32* %x.ld.addr
-  store i32 %x, i32* %x.st.addr
-  %i.next = add i64 %i, 1
-  %exitcond = icmp eq i64 %i.next, 256
-  br i1 %exitcond, label %for.end, label %for.body
-
-for.end:
-  ret void
-}
diff --git a/test/Analysis/LoopDependenceAnalysis/siv-strong.ll b/test/Analysis/LoopDependenceAnalysis/siv-strong.ll
new file mode 100644
index 0000000000..9536645e4c
--- /dev/null
+++ b/test/Analysis/LoopDependenceAnalysis/siv-strong.ll
@@ -0,0 +1,82 @@
+; RUN: llvm-as < %s | opt -disable-output -analyze -lda | FileCheck %s
+
+@x = common global [256 x i32] zeroinitializer, align 4
+@y = common global [256 x i32] zeroinitializer, align 4
+
+; for (i = 0; i < 256; i++)
+;   x[i] = x[i] + y[i]
+
+define void @f1(...) nounwind {
+entry:
+  br label %for.body
+
+for.body:
+  %i = phi i64 [ 0, %entry ], [ %i.next, %for.body ]
+  %y.addr = getelementptr [256 x i32]* @y, i64 0, i64 %i
+  %x.addr = getelementptr [256 x i32]* @x, i64 0, i64 %i
+  %x = load i32* %x.addr      ; 0
+  %y = load i32* %y.addr      ; 1
+  %r = add i32 %y, %x
+  store i32 %r, i32* %x.addr  ; 2
+; CHECK: 0,2: dep
+; CHECK: 1,2: ind
+  %i.next = add i64 %i, 1
+  %exitcond = icmp eq i64 %i.next, 256
+  br i1 %exitcond, label %for.end, label %for.body
+
+for.end:
+  ret void
+}
+
+; for (i = 0; i < 256; i++)
+;   x[i+1] = x[i] + y[i]
+
+define void @f2(...) nounwind {
+entry:
+  br label %for.body
+
+for.body:
+  %i = phi i64 [ 0, %entry ], [ %i.next, %for.body ]
+  %y.ld.addr = getelementptr [256 x i32]* @y, i64 0, i64 %i
+  %x.ld.addr = getelementptr [256 x i32]* @x, i64 0, i64 %i
+  %i.next = add i64 %i, 1
+  %x.st.addr = getelementptr [256 x i32]* @x, i64 0, i64 %i.next
+  %x = load i32* %x.ld.addr     ; 0
+  %y = load i32* %y.ld.addr     ; 1
+  %r = add i32 %y, %x
+  store i32 %r, i32* %x.st.addr ; 2
+; CHECK: 0,2: dep
+; CHECK: 1,2: ind
+  %exitcond = icmp eq i64 %i.next, 256
+  br i1 %exitcond, label %for.end, label %for.body
+
+for.end:
+  ret void
+}
+
+; for (i = 0; i < 10; i++)
+;   x[i+20] = x[i] + y[i]
+
+define void @f3(...) nounwind {
+entry:
+  br label %for.body
+
+for.body:
+  %i = phi i64 [ 0, %entry ], [ %i.next, %for.body ]
+  %y.ld.addr = getelementptr [256 x i32]* @y, i64 0, i64 %i
+  %x.ld.addr = getelementptr [256 x i32]* @x, i64 0, i64 %i
+  %i.20 = add i64 %i, 20
+  %x.st.addr = getelementptr [256 x i32]* @x, i64 0, i64 %i.20
+  %x = load i32* %x.ld.addr     ; 0
+  %y = load i32* %y.ld.addr     ; 1
+  %r = add i32 %y, %x
+  store i32 %r, i32* %x.st.addr ; 2
+; CHECK: 0,2: dep
+; CHECK: 1,2: ind
+  %i.next = add i64 %i, 1
+  %exitcond = icmp eq i64 %i.next, 256
+  br i1 %exitcond, label %for.end, label %for.body
+
+for.end:
+  ret void
+}
diff --git a/test/Analysis/LoopDependenceAnalysis/siv-strong1.ll b/test/Analysis/LoopDependenceAnalysis/siv-strong1.ll
deleted file mode 100644
index c416ff377f..0000000000
--- a/test/Analysis/LoopDependenceAnalysis/siv-strong1.ll
+++ /dev/null
@@ -1,30 +0,0 @@
-; RUN: llvm-as < %s | opt -disable-output -analyze -lda > %t
-; RUN: grep {instructions: 3} %t | count 1
-; RUN: grep {0,2: dependent} %t | count 1
-; RUN: grep {1,2: independent} %t | count 1
-
-; for (i = 0; i < 256; i++)
-;   x[i] = x[i] + y[i]
-
-@x = common global [256 x i32] zeroinitializer, align 4
-@y = common global [256 x i32] zeroinitializer, align 4
-
-define void @foo(...) nounwind {
-entry:
-  br label %for.body
-
-for.body:
-  %i = phi i64 [ 0, %entry ], [ %i.next, %for.body ]
-  %y.addr = getelementptr [256 x i32]* @y, i64 0, i64 %i
-  %x.addr = getelementptr [256 x i32]* @x, i64 0, i64 %i
-  %x = load i32* %x.addr
-  %y = load i32* %y.addr
-  %r = add i32 %y, %x
-  store i32 %r, i32* %x.addr
-  %i.next = add i64 %i, 1
-  %exitcond = icmp eq i64 %i.next, 256
-  br i1 %exitcond, label %for.end, label %for.body
-
-for.end:
-  ret void
-}
diff --git a/test/Analysis/LoopDependenceAnalysis/siv-strong2.ll b/test/Analysis/LoopDependenceAnalysis/siv-strong2.ll
deleted file mode 100644
index 7295863e37..0000000000
--- a/test/Analysis/LoopDependenceAnalysis/siv-strong2.ll
+++ /dev/null
@@ -1,31 +0,0 @@
-; RUN: llvm-as < %s | opt -disable-output -analyze -lda > %t
-; RUN: grep {instructions: 3} %t | count 1
-; RUN: grep {0,2: dependent} %t | count 1
-; RUN: grep {1,2: independent} %t | count 1
-
-; for (i = 0; i < 256; i++)
-;   x[i+1] = x[i] + y[i]
-
-@x = common global [256 x i32] zeroinitializer, align 4
-@y = common global [256 x i32] zeroinitializer, align 4
-
-define void @foo(...) nounwind {
-entry:
-  br label %for.body
-
-for.body:
-  %i = phi i64 [ 0, %entry ], [ %i.next, %for.body ]
-  %y.ld.addr = getelementptr [256 x i32]* @y, i64 0, i64 %i
-  %x.ld.addr = getelementptr [256 x i32]* @x, i64 0, i64 %i
-  %i.next = add i64 %i, 1
-  %x.st.addr = getelementptr [256 x i32]* @x, i64 0, i64 %i.next
-  %x = load i32* %x.ld.addr
-  %y = load i32* %y.ld.addr
-  %r = add i32 %y, %x
-  store i32 %r, i32* %x.st.addr
-  %exitcond = icmp eq i64 %i.next, 256
-  br i1 %exitcond, label %for.end, label %for.body
-
-for.end:
-  ret void
-}
diff --git a/test/Analysis/LoopDependenceAnalysis/siv-weak-crossing.ll b/test/Analysis/LoopDependenceAnalysis/siv-weak-crossing.ll
new file mode 100644
index 0000000000..eff3644d90
--- /dev/null
+++ b/test/Analysis/LoopDependenceAnalysis/siv-weak-crossing.ll
@@ -0,0 +1,86 @@
+; RUN: llvm-as < %s | opt -disable-output -analyze -lda | FileCheck %s
+
+@x = common global [256 x i32] zeroinitializer, align 4
+@y = common global [256 x i32] zeroinitializer, align 4
+
+; for (i = 0; i < 256; i++)
+;   x[i] = x[256 - i] + y[i]
+
+define void @f1(...) nounwind {
+entry:
+  br label %for.body
+
+for.body:
+  %i = phi i64 [ 0, %entry ], [ %i.next, %for.body ]
+  %i.256 = sub i64 256, %i
+  %y.ld.addr = getelementptr [256 x i32]* @y, i64 0, i64 %i.256
+  %x.ld.addr = getelementptr [256 x i32]* @x, i64 0, i64 %i
+  %x.st.addr = getelementptr [256 x i32]* @x, i64 0, i64 %i
+  %x = load i32* %x.ld.addr     ; 0
+  %y = load i32* %y.ld.addr     ; 1
+  %r = add i32 %y, %x
+  store i32 %r, i32* %x.st.addr ; 2
+; CHECK: 0,2: dep
+; CHECK: 1,2: ind
+  %i.next = add i64 %i, 1
+  %exitcond = icmp eq i64 %i.next, 256
+  br i1 %exitcond, label %for.end, label %for.body
+
+for.end:
+  ret void
+}
+
+; // the same example, using more realistic IR
+; for (i = 0; i < 256; i++)
+;   x[i] = x[256 - i] + y[i]
+
+define void @f2(...) nounwind {
+entry:
+  br label %for.body
+
+for.body:
+  %i = phi i64 [ 0, %entry ], [ %i.next, %for.body ]
+  %i.256 = sub i64 0, %i
+  %y.ld.addr = getelementptr [256 x i32]* @y, i64 0, i64 %i
+  %x.ld.addr = getelementptr [256 x i32]* @x, i64 1, i64 %i.256
+  %x.st.addr = getelementptr [256 x i32]* @x, i64 0, i64 %i
+  %x = load i32* %x.ld.addr     ; 0
+  %y = load i32* %y.ld.addr     ; 1
+  %r = add i32 %y, %x
+  store i32 %r, i32* %x.st.addr ; 2
+; CHECK: 0,2: dep
+; CHECK: 1,2: ind
+  %i.next = add i64 %i, 1
+  %exitcond = icmp eq i64 %i.next, 256
+  br i1 %exitcond, label %for.end, label %for.body
+
+for.end:
+  ret void
+}
+
+; for (i = 0; i < 100; i++)
+;   x[i] = x[256 - i] + y[i]
+
+define void @f3(...) nounwind {
+entry:
+  br label %for.body
+
+for.body:
+  %i = phi i64 [ 0, %entry ], [ %i.next, %for.body ]
+  %i.256 = sub i64 0, %i
+  %y.ld.addr = getelementptr [256 x i32]* @y, i64 0, i64 %i
+  %x.ld.addr = getelementptr [256 x i32]* @x, i64 1, i64 %i.256
+  %x.st.addr = getelementptr [256 x i32]* @x, i64 0, i64 %i
+  %x = load i32* %x.ld.addr     ; 0
+  %y = load i32* %y.ld.addr     ; 1
+  %r = add i32 %y, %x
+  store i32 %r, i32* %x.st.addr ; 2
+; CHECK: 0,2: dep
+; CHECK: 1,2: ind
+  %i.next = add i64 %i, 1
+  %exitcond = icmp eq i64 %i.next, 100
+  br i1 %exitcond, label %for.end, label %for.body
+
+for.end:
+  ret void
+}
diff --git a/test/Analysis/LoopDependenceAnalysis/siv-weak-zero.ll b/test/Analysis/LoopDependenceAnalysis/siv-weak-zero.ll
new file mode 100644
index 0000000000..12c90ba4cb
--- /dev/null
+++ b/test/Analysis/LoopDependenceAnalysis/siv-weak-zero.ll
@@ -0,0 +1,56 @@
+; RUN: llvm-as < %s | opt -disable-output -analyze -lda | FileCheck %s
+
+@x = common global [256 x i32] zeroinitializer, align 4
+@y = common global [256 x i32] zeroinitializer, align 4
+
+; for (i = 0; i < 256; i++)
+;   x[i] = x[42] + y[i]
+
+define void @f1(...) nounwind {
+entry:
+  %x.ld.addr = getelementptr [256 x i32]* @x, i64 0, i64 42
+  br label %for.body
+
+for.body:
+  %i = phi i64 [ 0, %entry ], [ %i.next, %for.body ]
+  %x.addr = getelementptr [256 x i32]* @x, i64 0, i64 %i
+  %y.addr = getelementptr [256 x i32]* @y, i64 0, i64 %i
+  %x = load i32* %x.ld.addr   ; 0
+  %y = load i32* %y.addr      ; 1
+  %r = add i32 %y, %x
+  store i32 %r, i32* %x.addr  ; 2
+; CHECK: 0,2: dep
+; CHECK: 1,2: ind
+  %i.next = add i64 %i, 1
+  %exitcond = icmp eq i64 %i.next, 256
+  br i1 %exitcond, label %for.end, label %for.body
+
+for.end:
+  ret void
+}
+
+; for (i = 0; i < 250; i++)
+;   x[i] = x[255] + y[i]
+
+define void @f2(...) nounwind {
+entry:
+  %x.ld.addr = getelementptr [256 x i32]* @x, i64 0, i64 255
+  br label %for.body
+
+for.body:
+  %i = phi i64 [ 0, %entry ], [ %i.next, %for.body ]
+  %x.addr = getelementptr [256 x i32]* @x, i64 0, i64 %i
+  %y.addr = getelementptr [256 x i32]* @y, i64 0, i64 %i
+  %x = load i32* %x.ld.addr   ; 0
+  %y = load i32* %y.addr      ; 1
+  %r = add i32 %y, %x
+  store i32 %r, i32* %x.addr  ; 2
+; CHECK: 0,2: dep
+; CHECK: 1,2: ind
+  %i.next = add i64 %i, 1
+  %exitcond = icmp eq i64 %i.next, 250
+  br i1 %exitcond, label %for.end, label %for.body
+
+for.end:
+  ret void
+}
diff --git a/test/Analysis/LoopDependenceAnalysis/ziv2.ll b/test/Analysis/LoopDependenceAnalysis/ziv.ll
index cecf3a750b..b099a57ae7 100644
--- a/test/Analysis/LoopDependenceAnalysis/ziv2.ll
+++ b/test/Analysis/LoopDependenceAnalysis/ziv.ll
@@ -1,12 +1,29 @@
-; RUN: llvm-as < %s | opt -disable-output -analyze -lda > %t
-; RUN: grep {instructions: 2} %t | count 1
-; RUN: grep {0,1: dependent} %t | count 1
-
-; x[c] = x[c+1] // with c being a loop-invariant constant
+; RUN: llvm-as < %s | opt -disable-output -analyze -lda | FileCheck %s
 
 @x = common global [256 x i32] zeroinitializer, align 4
 
-define void @foo(i64 %c0) nounwind {
+; x[5] = x[6]
+
+define void @f1(...) nounwind {
+entry:
+  br label %for.body
+
+for.body:
+  %i = phi i64 [ 0, %entry ], [ %i.next, %for.body ]
+  %x = load i32* getelementptr ([256 x i32]* @x, i32 0, i64 6)
+  store i32 %x, i32* getelementptr ([256 x i32]* @x, i32 0, i64 5)
+; CHECK: 0,1: dep
+  %i.next = add i64 %i, 1
+  %exitcond = icmp eq i64 %i.next, 256
+  br i1 %exitcond, label %for.end, label %for.body
+
+for.end:
+  ret void
+}
+
+; x[c] = x[c+1] // with c being a loop-invariant constant
+
+define void @f2(i64 %c0) nounwind {
 entry:
   %c1 = add i64 %c0, 1
   %x.ld.addr = getelementptr [256 x i32]* @x, i64 0, i64 %c0
@@ -17,6 +34,7 @@ for.body:
   %i = phi i64 [ 0, %entry ], [ %i.next, %for.body ]
   %x = load i32* %x.ld.addr
   store i32 %x, i32* %x.st.addr
+; CHECK: 0,1: dep
   %i.next = add i64 %i, 1
   %exitcond = icmp eq i64 %i.next, 256
   br i1 %exitcond, label %for.end, label %for.body
diff --git a/test/Analysis/LoopDependenceAnalysis/ziv1.ll b/test/Analysis/LoopDependenceAnalysis/ziv1.ll
deleted file mode 100644
index e42c0a08cb..0000000000
--- a/test/Analysis/LoopDependenceAnalysis/ziv1.ll
+++ /dev/null
@@ -1,23 +0,0 @@
-; RUN: llvm-as < %s | opt -disable-output -analyze -lda > %t
-; RUN: grep {instructions: 2} %t | count 1
-; RUN: grep {0,1: dependent} %t | count 1
-
-; x[5] = x[6]
-
-@x = common global [256 x i32] zeroinitializer, align 4
-
-define void @foo(...) nounwind {
-entry:
-  br label %for.body
-
-for.body:
-  %i = phi i64 [ 0, %entry ], [ %i.next, %for.body ]
-  %x = load i32* getelementptr ([256 x i32]* @x, i32 0, i64 6)
-  store i32 %x, i32* getelementptr ([256 x i32]* @x, i32 0, i64 5)
-  %i.next = add i64 %i, 1
-  %exitcond = icmp eq i64 %i.next, 256
-  br i1 %exitcond, label %for.end, label %for.body
-
-for.end:
-  ret void
-}