diff options
| author | Duncan Sands <baldrick@free.fr> | 2010-11-13 21:33:19 +0000 |
|---|---|---|
| committer | Duncan Sands <baldrick@free.fr> | 2010-11-13 21:33:19 +0000 |
| commit | dd609e912ba439c1f4f0a5d09ce9327debc9f486 (patch) | |
| tree | 8bb2f5b8a4a1562a8eecdbd3fe413edbc4335c2e /test/Transforms/GVN | |
| parent | 948cf0289f8280f7e069603837d56c862515c6e1 (diff) | |
| download | llvm-dd609e912ba439c1f4f0a5d09ce9327debc9f486.tar.gz llvm-dd609e912ba439c1f4f0a5d09ce9327debc9f486.tar.bz2 llvm-dd609e912ba439c1f4f0a5d09ce9327debc9f486.tar.xz | |
Testcase to go along with commit 118923 ("Have GVN simplify instructions
as it goes"). Before -std-compile-opts only got it down to
%a = tail call i32 @foo(i32 0) readnone
%x = tail call i32 @foo(i32 %a) readnone
%y = tail call i32 @foo(i32 %a) readnone
%z = icmp eq i32 %x, %y
ret i1 %z
while now -basicaa -gvn alone reduce it to
%a = call i32 @foo(i32 0) readnone
%x = call i32 @foo(i32 %a) readnone
ret i1 true
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@119009 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'test/Transforms/GVN')
| -rw-r--r-- | test/Transforms/GVN/2010-11-13-Simplify.ll | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/test/Transforms/GVN/2010-11-13-Simplify.ll b/test/Transforms/GVN/2010-11-13-Simplify.ll new file mode 100644 index 0000000000..07585a20b6 --- /dev/null +++ b/test/Transforms/GVN/2010-11-13-Simplify.ll @@ -0,0 +1,15 @@ +; RUN: opt < %s -basicaa -gvn -S | FileCheck %s + +declare i32 @foo(i32) readnone + +define i1 @bar() { +; CHECK: @bar + %a = call i32 @foo (i32 0) readnone + %b = call i32 @foo (i32 0) readnone + %c = and i32 %a, %b + %x = call i32 @foo (i32 %a) readnone + %y = call i32 @foo (i32 %c) readnone + %z = icmp eq i32 %x, %y + ret i1 %z +; CHECK: ret i1 true +} |