From dd609e912ba439c1f4f0a5d09ce9327debc9f486 Mon Sep 17 00:00:00 2001 From: Duncan Sands Date: Sat, 13 Nov 2010 21:33:19 +0000 Subject: [PATCH] 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 --- test/Transforms/GVN/2010-11-13-Simplify.ll | 15 +++++++++++++++ 1 file changed, 15 insertions(+) create mode 100644 test/Transforms/GVN/2010-11-13-Simplify.ll 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 00000000000..07585a20b6c --- /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 +} -- 2.34.1