81 lines
2.1 KiB
LLVM
81 lines
2.1 KiB
LLVM
; RUN: opt -S -instsimplify < %s | FileCheck %s
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target datalayout = "e-m:o-i64:64-f80:128-n8:16:32:64-S128"
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%struct.A = type { [7 x i8] }
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define %struct.A* @test1(%struct.A* %b, %struct.A* %e) {
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%e_ptr = ptrtoint %struct.A* %e to i64
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%b_ptr = ptrtoint %struct.A* %b to i64
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%sub = sub i64 %e_ptr, %b_ptr
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%sdiv = sdiv exact i64 %sub, 7
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%gep = getelementptr inbounds %struct.A, %struct.A* %b, i64 %sdiv
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ret %struct.A* %gep
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; CHECK-LABEL: @test1
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; CHECK-NEXT: ret %struct.A* %e
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}
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define i8* @test2(i8* %b, i8* %e) {
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%e_ptr = ptrtoint i8* %e to i64
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%b_ptr = ptrtoint i8* %b to i64
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%sub = sub i64 %e_ptr, %b_ptr
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%gep = getelementptr inbounds i8, i8* %b, i64 %sub
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ret i8* %gep
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; CHECK-LABEL: @test2
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; CHECK-NEXT: ret i8* %e
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}
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define i64* @test3(i64* %b, i64* %e) {
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%e_ptr = ptrtoint i64* %e to i64
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%b_ptr = ptrtoint i64* %b to i64
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%sub = sub i64 %e_ptr, %b_ptr
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%ashr = ashr exact i64 %sub, 3
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%gep = getelementptr inbounds i64, i64* %b, i64 %ashr
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ret i64* %gep
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; CHECK-LABEL: @test3
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; CHECK-NEXT: ret i64* %e
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}
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define %struct.A* @test4(%struct.A* %b) {
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%b_ptr = ptrtoint %struct.A* %b to i64
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%sub = sub i64 0, %b_ptr
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%sdiv = sdiv exact i64 %sub, 7
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%gep = getelementptr inbounds %struct.A, %struct.A* %b, i64 %sdiv
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ret %struct.A* %gep
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; CHECK-LABEL: @test4
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; CHECK-NEXT: ret %struct.A* null
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}
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define i8* @test5(i8* %b) {
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%b_ptr = ptrtoint i8* %b to i64
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%sub = sub i64 0, %b_ptr
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%gep = getelementptr inbounds i8, i8* %b, i64 %sub
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ret i8* %gep
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; CHECK-LABEL: @test5
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; CHECK-NEXT: ret i8* null
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}
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define i64* @test6(i64* %b) {
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%b_ptr = ptrtoint i64* %b to i64
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%sub = sub i64 0, %b_ptr
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%ashr = ashr exact i64 %sub, 3
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%gep = getelementptr inbounds i64, i64* %b, i64 %ashr
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ret i64* %gep
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; CHECK-LABEL: @test6
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; CHECK-NEXT: ret i64* null
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}
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define i8* @test7(i8* %b, i8** %e) {
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%e_ptr = ptrtoint i8** %e to i64
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%b_ptr = ptrtoint i8* %b to i64
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%sub = sub i64 %e_ptr, %b_ptr
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%gep = getelementptr inbounds i8, i8* %b, i64 %sub
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ret i8* %gep
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; CHECK-LABEL: @test7
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; CHECK-NEXT: ptrtoint
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; CHECK-NEXT: ptrtoint
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; CHECK-NEXT: sub
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; CHECK-NEXT: getelementptr
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; CHECK-NEXT: ret
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}
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