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https://github.com/c64scene-ar/llvm-6502.git
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b1e1e82c54
of using llvm-as, now that opt supports this. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@81226 91177308-0d34-0410-b5e6-96231b3b80d8
30 lines
946 B
LLVM
30 lines
946 B
LLVM
; Tests to make sure elimination of casts is working correctly
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; RUN: opt %s -instcombine | llvm-dis | FileCheck %s
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target datalayout = "p:32:32"
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; This shouldn't convert to getelementptr because the relationship
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; between the arithmetic and the layout of allocated memory is
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; entirely unknown.
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; CHECK: @test1
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; CHECK: ptrtoint
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; CHECK: add
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; CHECK: inttoptr
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define i8* @test1(i8* %t) {
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%tmpc = ptrtoint i8* %t to i32 ; <i32> [#uses=1]
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%tmpa = add i32 %tmpc, 32 ; <i32> [#uses=1]
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%tv = inttoptr i32 %tmpa to i8* ; <i8*> [#uses=1]
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ret i8* %tv
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}
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; These casts should be folded away.
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; CHECK: @test2
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; CHECK: icmp eq i8* %a, %b
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define i1 @test2(i8* %a, i8* %b) {
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%tmpa = ptrtoint i8* %a to i32 ; <i32> [#uses=1]
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%tmpb = ptrtoint i8* %b to i32 ; <i32> [#uses=1]
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%r = icmp eq i32 %tmpa, %tmpb ; <i1> [#uses=1]
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ret i1 %r
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}
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