From 2da863984bdd0123fa53ab3f5439d239a5a9e419 Mon Sep 17 00:00:00 2001 From: Michael Liao Date: Fri, 21 Jun 2013 18:45:27 +0000 Subject: Fix PR16360 When (srl (anyextend x), c) is folded into (anyextend (srl x, c)), the high bits are not cleared. Add 'and' to clear off them. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@184575 91177308-0d34-0410-b5e6-96231b3b80d8 --- test/CodeGen/X86/pr16360.ll | 16 ++++++++++++++++ 1 file changed, 16 insertions(+) create mode 100644 test/CodeGen/X86/pr16360.ll (limited to 'test/CodeGen/X86/pr16360.ll') diff --git a/test/CodeGen/X86/pr16360.ll b/test/CodeGen/X86/pr16360.ll new file mode 100644 index 0000000000..247d5100b4 --- /dev/null +++ b/test/CodeGen/X86/pr16360.ll @@ -0,0 +1,16 @@ +; RUN: llc < %s -mtriple=i686-pc-linux | FileCheck %s + +define i64 @foo(i32 %sum) { +entry: + %conv = sext i32 %sum to i64 + %shr = lshr i64 %conv, 2 + %or = or i64 4611686018360279040, %shr + ret i64 %or +} + +; CHECK: foo +; CHECK: shrl $2 +; CHECK: orl $-67108864 +; CHECK-NOT: movl $-1 +; CHECK: movl $1073741823 +; CHECK: ret -- cgit v1.2.3