From dc40be75f8537e036b593f454765940e69ef7025 Mon Sep 17 00:00:00 2001
From: Volkan Keles <vkeles@apple.com>
Date: Tue, 23 Jan 2018 21:51:34 +0000
Subject: [llvm-extract] Support extracting basic blocks

Summary:
Currently, there is no way to extract a basic block from a function easily. This patch
extends llvm-extract to extract the specified basic block(s).

Reviewers: loladiro, rafael, bogner

Reviewed By: bogner

Subscribers: hintonda, mgorny, qcolombet, llvm-commits

Differential Revision: https://reviews.llvm.org/D41638

llvm-svn: 323266
---
 llvm/test/tools/llvm-extract/extract-block.ll | 29 +++++++++++++++++++++++++++
 1 file changed, 29 insertions(+)
 create mode 100644 llvm/test/tools/llvm-extract/extract-block.ll

(limited to 'llvm/test/tools/llvm-extract/extract-block.ll')

diff --git a/llvm/test/tools/llvm-extract/extract-block.ll b/llvm/test/tools/llvm-extract/extract-block.ll
new file mode 100644
index 00000000000..761ed3268aa
--- /dev/null
+++ b/llvm/test/tools/llvm-extract/extract-block.ll
@@ -0,0 +1,29 @@
+; RUN: llvm-extract -S -bb foo:bb4 %s | FileCheck %s
+
+; CHECK: @foo_bb4
+; CHECK: %tmp5
+define i32 @foo(i32 %arg) {
+bb:
+  %tmp = alloca i32, align 4
+  %tmp1 = alloca i32, align 4
+  store i32 %arg, i32* %tmp1, align 4
+  %tmp2 = load i32, i32* %tmp1, align 4
+  %tmp3 = icmp sgt i32 %tmp2, 0
+  br i1 %tmp3, label %bb4, label %bb7
+
+bb4:                                              ; preds = %bb
+  %tmp5 = load i32, i32* %tmp1, align 4
+  %tmp6 = add nsw i32 %tmp5, 1
+  store i32 %tmp6, i32* %tmp1, align 4
+  store i32 %tmp6, i32* %tmp, align 4
+  br label %bb8
+
+bb7:                                              ; preds = %bb
+  store i32 0, i32* %tmp, align 4
+  br label %bb8
+
+bb8:                                              ; preds = %bb7, %bb4
+  %tmp9 = load i32, i32* %tmp, align 4
+  ret i32 %tmp9
+}
+
-- 
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