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Add test showing that MachineLICM is calculating register pressure wrong

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More details: http://llvm.org/PR23143

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@234309 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Daniel Jasper 2015-04-07 11:41:40 +00:00
parent 78906c6555
commit ee6f78817a
1 changed files with 39 additions and 0 deletions
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39
test/CodeGen/X86/licm-regpressure.ll Normal file
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; 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*)