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https://github.com/c64scene-ar/llvm-6502.git
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fe5e584cd9
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@698 91177308-0d34-0410-b5e6-96231b3b80d8
60 lines
1.4 KiB
LLVM
60 lines
1.4 KiB
LLVM
const long 12
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implementation
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ulong "const removal"()
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const long 12345
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%q = const uint 4000000000 ; Def %q - uint plane
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const ulong 123 ; Def 0 - ulong plane
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const ulong 4000000000000 ; Def 1 - ulong plane
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begin
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ret ulong %1
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end
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void "dce #1"()
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const int 0
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begin
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ret void
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ret void ; Unreachable label
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end
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void "basic block merge #1"(int %a, uint %b, bool %c, ulong %d)
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begin
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add int %0, %0
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br label %TestName ; Can be merged with next block
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TestName:
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add uint %0, %0
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br label %1 ; Can be merged with next block
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add ulong %0, %0
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ret void
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end
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void "const prop #1"()
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%x = const int 0 ; Def %x - int plane
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const int 0 ; Def 0 - int plane
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const bool false
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begin
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Startup:
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%x = seteq int %0, %x
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br bool %x, label %0, label %Startup ; Can be eliminated by const prop
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ret void
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end
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int "const prop #2"()
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begin
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%x = add int 1, 1 ; Instrs can be const prop'd away
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%y = sub int -1, 1
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%z = add int %x, %y
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ret int %z ; Should equal %0
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end
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sbyte "const prop #3"() ; Instrs can be const prop'd away
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begin
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%x = add sbyte 127, 127 ; Must wrap around correctly!
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%y = sub sbyte 1, -1
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%z = add sbyte %x, %y
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ret sbyte %z ; Should equal %0!
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end
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