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llvm-6502/test/Transforms/LICM/2008-07-22-LoadGlobalConstant.ll

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Enable hoisting of loads from constant memory by default. In cases where they are lowered to instruction sequences more complex than a simple load, such that CodeGen cannot rematerialize them, a reload from a spill slot is likely to be cheaper than the complex sequence. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@89374 91177308-0d34-0410-b5e6-96231b3b80d8
2009-11-19 19:00:10 +00:00
; RUN: opt < %s -licm -S | FileCheck %s
Convert a few tests to FileCheck for PR5307. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@85171 91177308-0d34-0410-b5e6-96231b3b80d8
2009-10-26 22:52:03 +00:00
"Allow LICM to sink or lift loads from constant memory. Also add a test case for this. This allows instructions like loads from global variables declared to be constant to be moved out of loops." Patch by Stefanus Du Toit! git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@53945 91177308-0d34-0410-b5e6-96231b3b80d8
2008-07-23 05:06:28 +00:00
@a = external constant float*
define void @test(i32 %count) {
entry:
br label %forcond
Convert a few tests to FileCheck for PR5307. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@85171 91177308-0d34-0410-b5e6-96231b3b80d8
2009-10-26 22:52:03 +00:00
; CHECK: %tmp3 = load float** @a
; CHECK: br label %forcond
"Allow LICM to sink or lift loads from constant memory. Also add a test case for this. This allows instructions like loads from global variables declared to be constant to be moved out of loops." Patch by Stefanus Du Toit! git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@53945 91177308-0d34-0410-b5e6-96231b3b80d8
2008-07-23 05:06:28 +00:00
forcond:
%i.0 = phi i32 [ 0, %entry ], [ %inc, %forbody ]
%cmp = icmp ult i32 %i.0, %count
br i1 %cmp, label %forbody, label %afterfor
Convert a few tests to FileCheck for PR5307. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@85171 91177308-0d34-0410-b5e6-96231b3b80d8
2009-10-26 22:52:03 +00:00
; CHECK: %i.0 = phi i32 [ 0, %entry ], [ %inc, %forbody ]
; CHECK: %cmp = icmp ult i32 %i.0, %count
; CHECK: br i1 %cmp, label %forbody, label %afterfor
"Allow LICM to sink or lift loads from constant memory. Also add a test case for this. This allows instructions like loads from global variables declared to be constant to be moved out of loops." Patch by Stefanus Du Toit! git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@53945 91177308-0d34-0410-b5e6-96231b3b80d8
2008-07-23 05:06:28 +00:00
forbody:
%tmp3 = load float** @a
%arrayidx = getelementptr float* %tmp3, i32 %i.0
%tmp7 = uitofp i32 %i.0 to float
store float %tmp7, float* %arrayidx
%inc = add i32 %i.0, 1
br label %forcond
Convert a few tests to FileCheck for PR5307. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@85171 91177308-0d34-0410-b5e6-96231b3b80d8
2009-10-26 22:52:03 +00:00
; CHECK: %arrayidx = getelementptr float* %tmp3, i32 %i.0
; CHECK: %tmp7 = uitofp i32 %i.0 to float
; CHECK: store float %tmp7, float* %arrayidx
; CHECK: %inc = add i32 %i.0, 1
; CHECK: br label %forcond
"Allow LICM to sink or lift loads from constant memory. Also add a test case for this. This allows instructions like loads from global variables declared to be constant to be moved out of loops." Patch by Stefanus Du Toit! git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@53945 91177308-0d34-0410-b5e6-96231b3b80d8
2008-07-23 05:06:28 +00:00
afterfor:
ret void
}
Convert a few tests to FileCheck for PR5307. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@85171 91177308-0d34-0410-b5e6-96231b3b80d8
2009-10-26 22:52:03 +00:00
; CHECK: ret void
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