mirror of
https://github.com/c64scene-ar/llvm-6502.git
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faf601ee93
This was introduced in r173293. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@174424 91177308-0d34-0410-b5e6-96231b3b80d8
79 lines
2.5 KiB
LLVM
79 lines
2.5 KiB
LLVM
; RUN: opt < %s -instsimplify -S | FileCheck %s
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target datalayout = "e-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-v64:64:64-v128:128:128-a0:0:64-s0:64:64-f80:128:128-n8:16:32:64-S128"
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target triple = "x86_64-unknown-linux-gnu"
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define i64 @ptrdiff1(i8* %ptr) {
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; CHECK: @ptrdiff1
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; CHECK-NEXT: ret i64 42
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%first = getelementptr inbounds i8* %ptr, i32 0
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%last = getelementptr inbounds i8* %ptr, i32 42
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%first.int = ptrtoint i8* %first to i64
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%last.int = ptrtoint i8* %last to i64
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%diff = sub i64 %last.int, %first.int
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ret i64 %diff
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}
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define i64 @ptrdiff2(i8* %ptr) {
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; CHECK: @ptrdiff2
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; CHECK-NEXT: ret i64 42
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%first1 = getelementptr inbounds i8* %ptr, i32 0
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%first2 = getelementptr inbounds i8* %first1, i32 1
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%first3 = getelementptr inbounds i8* %first2, i32 2
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%first4 = getelementptr inbounds i8* %first3, i32 4
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%last1 = getelementptr inbounds i8* %first2, i32 48
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%last2 = getelementptr inbounds i8* %last1, i32 8
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%last3 = getelementptr inbounds i8* %last2, i32 -4
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%last4 = getelementptr inbounds i8* %last3, i32 -4
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%first.int = ptrtoint i8* %first4 to i64
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%last.int = ptrtoint i8* %last4 to i64
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%diff = sub i64 %last.int, %first.int
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ret i64 %diff
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}
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define i64 @ptrdiff3(i8* %ptr) {
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; Don't bother with non-inbounds GEPs.
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; CHECK: @ptrdiff3
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; CHECK: getelementptr
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; CHECK: sub
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; CHECK: ret
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%first = getelementptr i8* %ptr, i32 0
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%last = getelementptr i8* %ptr, i32 42
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%first.int = ptrtoint i8* %first to i64
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%last.int = ptrtoint i8* %last to i64
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%diff = sub i64 %last.int, %first.int
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ret i64 %diff
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}
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define <4 x i32> @ptrdiff4(<4 x i8*> %arg) nounwind {
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; Handle simple cases of vectors of pointers.
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; CHECK: @ptrdiff4
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; CHECK: ret <4 x i32> zeroinitializer
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%p1 = ptrtoint <4 x i8*> %arg to <4 x i32>
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%bc = bitcast <4 x i8*> %arg to <4 x i32*>
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%p2 = ptrtoint <4 x i32*> %bc to <4 x i32>
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%sub = sub <4 x i32> %p1, %p2
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ret <4 x i32> %sub
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}
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%struct.ham = type { i32, [2 x [2 x i32]] }
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@global = internal global %struct.ham zeroinitializer, align 4
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define i32 @ptrdiff5() nounwind {
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bb:
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%tmp = getelementptr inbounds %struct.ham* @global, i32 0, i32 1
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%tmp1 = getelementptr inbounds [2 x [2 x i32]]* %tmp, i32 0, i32 0
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%tmp2 = bitcast [2 x i32]* %tmp1 to i32*
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%tmp3 = ptrtoint i32* %tmp2 to i32
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%tmp4 = getelementptr inbounds %struct.ham* @global, i32 0, i32 1
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%tmp5 = getelementptr inbounds [2 x [2 x i32]]* %tmp4, i32 0, i32 0
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%tmp6 = ptrtoint [2 x i32]* %tmp5 to i32
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%tmp7 = sub i32 %tmp3, %tmp6
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ret i32 %tmp7
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; CHECK: @ptrdiff5
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; CHECK: ret i32 0
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}
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