From ee6f78817a57f016137f33b2b77ec7f7ecb01fd3 Mon Sep 17 00:00:00 2001 From: Daniel Jasper Date: Tue, 7 Apr 2015 11:41:40 +0000 Subject: [PATCH] Add test showing that MachineLICM is calculating register pressure wrong More details: http://llvm.org/PR23143 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@234309 91177308-0d34-0410-b5e6-96231b3b80d8 --- test/CodeGen/X86/licm-regpressure.ll | 39 ++++++++++++++++++++++++++++ 1 file changed, 39 insertions(+) create mode 100644 test/CodeGen/X86/licm-regpressure.ll diff --git a/test/CodeGen/X86/licm-regpressure.ll b/test/CodeGen/X86/licm-regpressure.ll new file mode 100644 index 00000000000..0ab655419c8 --- /dev/null +++ b/test/CodeGen/X86/licm-regpressure.ll @@ -0,0 +1,39 @@ +; RUN: llc < %s -mtriple=x86_64-linux | FileCheck %s +; This tests currently fails as MachineLICM does not compute register pressure +; correctly. More details: llvm.org/PR23143 +; XFAIL: * + +; MachineLICM should take register pressure into account. +; CHECK-NOT: Spill + +%struct.A = type { i32, i32, i32, i32, i32, i32, i32 } + +define void @test(i1 %b, %struct.A* %a) nounwind { +entry: + br label %loop-header + +loop-header: + br label %loop-body + +loop-body: + %0 = getelementptr inbounds %struct.A, %struct.A* %a, i64 0, i32 0 + %1 = getelementptr inbounds %struct.A, %struct.A* %a, i64 0, i32 1 + %2 = getelementptr inbounds %struct.A, %struct.A* %a, i64 0, i32 2 + %3 = getelementptr inbounds %struct.A, %struct.A* %a, i64 0, i32 3 + %4 = getelementptr inbounds %struct.A, %struct.A* %a, i64 0, i32 4 + %5 = getelementptr inbounds %struct.A, %struct.A* %a, i64 0, i32 5 + %6 = getelementptr inbounds %struct.A, %struct.A* %a, i64 0, i32 6 + call void @assign(i32* %0) + call void @assign(i32* %1) + call void @assign(i32* %2) + call void @assign(i32* %3) + call void @assign(i32* %4) + call void @assign(i32* %5) + call void @assign(i32* %6) + br i1 %b, label %loop-body, label %loop-exit + +loop-exit: + ret void +} + +declare void @assign(i32*) -- 2.34.1