From d9b720d279cc0627b10adf9f7516bf355a0a2174 Mon Sep 17 00:00:00 2001 From: Bill Wendling Date: Thu, 16 May 2013 00:27:57 +0000 Subject: Merging r181580: ------------------------------------------------------------------------ r181580 | tstellar | 2013-05-09 19:09:45 -0700 (Thu, 09 May 2013) | 10 lines MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit R600: Remove AMDILPeeopholeOptimizer and replace optimizations with tablegen patterns The BFE optimization was the only one we were actually using, and it was emitting an intrinsic that we don't support. https://bugs.freedesktop.org/show_bug.cgi?id=64201 Reviewed-by: Christian König NOTE: This is a candidate for the 3.3 branch. ------------------------------------------------------------------------ git-svn-id: https://llvm.org/svn/llvm-project/llvm/branches/release_33@181954 91177308-0d34-0410-b5e6-96231b3b80d8 --- test/CodeGen/R600/bfe_uint.ll | 26 ++++++++++++++++++++++++++ 1 file changed, 26 insertions(+) create mode 100644 test/CodeGen/R600/bfe_uint.ll (limited to 'test/CodeGen') diff --git a/test/CodeGen/R600/bfe_uint.ll b/test/CodeGen/R600/bfe_uint.ll new file mode 100644 index 0000000000..92570c3152 --- /dev/null +++ b/test/CodeGen/R600/bfe_uint.ll @@ -0,0 +1,26 @@ +; RUN: llc < %s -march=r600 -mcpu=redwood | FileCheck %s + +; CHECK: @bfe_def +; CHECK: BFE_UINT +define void @bfe_def(i32 addrspace(1)* %out, i32 %x) { +entry: + %0 = lshr i32 %x, 5 + %1 = and i32 %0, 15 ; 0xf + store i32 %1, i32 addrspace(1)* %out + ret void +} + +; This program could be implemented using a BFE_UINT instruction, however +; since the lshr constant + number of bits in the mask is >= 32, it can also be +; implmented with a LSHR instruction, which is better, because LSHR has less +; operands and requires less constants. + +; CHECK: @bfe_shift +; CHECK-NOT: BFE_UINT +define void @bfe_shift(i32 addrspace(1)* %out, i32 %x) { +entry: + %0 = lshr i32 %x, 16 + %1 = and i32 %0, 65535 ; 0xffff + store i32 %1, i32 addrspace(1)* %out + ret void +} -- cgit v1.2.3