derek.holloway
7502bf64a4
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146 lines
7.0 KiB
LLVM
146 lines
7.0 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --version 5
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; RUN: opt -S -passes=instsimplify < %s | FileCheck %s
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;; Check that we do not create new inttoptr instructions for unstable pointers
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;; or pointers with external state (even if the values are all constants).
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;; NOTE: for all but the zero address space, the GEP should only modify the
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;; low 8 bits of the pointer.
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target datalayout = "p:16:16:16:16-p1:16:16:16:8-pu2:16:16:16:8-pe3:16:16:16:8"
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define ptr @test_null_base_normal() {
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; CHECK-LABEL: define ptr @test_null_base_normal() {
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; CHECK-NEXT: ret ptr inttoptr (i16 -2 to ptr)
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;
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%gep = getelementptr i8, ptr null, i8 -2
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ret ptr %gep
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}
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define ptr @test_inttoptr_base_normal() {
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; CHECK-LABEL: define ptr @test_inttoptr_base_normal() {
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; CHECK-NEXT: ret ptr null
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;
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%base = inttoptr i16 -1 to ptr
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%gep = getelementptr i8, ptr %base, i8 1
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ret ptr %gep
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}
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;; Transformation is fine for non-integral address space, but we can only change
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;; the index bits: (i8 -2 == i16 254)
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define ptr addrspace(1) @test_null_base_nonintegral() {
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; CHECK-LABEL: define ptr addrspace(1) @test_null_base_nonintegral() {
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; CHECK-NEXT: ret ptr addrspace(1) inttoptr (i16 254 to ptr addrspace(1))
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;
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%gep = getelementptr i8, ptr addrspace(1) null, i8 -2
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ret ptr addrspace(1) %gep
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}
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define ptr addrspace(1) @test_inttoptr_base_nonintegral() {
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; CHECK-LABEL: define ptr addrspace(1) @test_inttoptr_base_nonintegral() {
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; CHECK-NEXT: ret ptr addrspace(1) inttoptr (i16 -256 to ptr addrspace(1))
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;
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%base = inttoptr i16 -1 to ptr addrspace(1)
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%gep = getelementptr i8, ptr addrspace(1) %base, i8 1
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ret ptr addrspace(1) %gep
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}
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;; For unstable pointers we should avoid any introduction of inttoptr
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define ptr addrspace(2) @test_null_base_unstable() {
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; CHECK-LABEL: define ptr addrspace(2) @test_null_base_unstable() {
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; CHECK-NEXT: ret ptr addrspace(2) getelementptr (i8, ptr addrspace(2) null, i8 -2)
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;
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%gep = getelementptr i8, ptr addrspace(2) null, i8 -2
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ret ptr addrspace(2) %gep
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}
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define ptr addrspace(2) @test_inttoptr_base_unstable() {
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; CHECK-LABEL: define ptr addrspace(2) @test_inttoptr_base_unstable() {
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; CHECK-NEXT: ret ptr addrspace(2) getelementptr (i8, ptr addrspace(2) inttoptr (i16 -1 to ptr addrspace(2)), i8 1)
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;
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%base = inttoptr i16 -1 to ptr addrspace(2)
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%gep = getelementptr i8, ptr addrspace(2) %base, i8 1
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ret ptr addrspace(2) %gep
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}
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;; The same is true for pointers with external state: no new inttoptr
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define ptr addrspace(3) @test_null_base_external() {
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; CHECK-LABEL: define ptr addrspace(3) @test_null_base_external() {
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; CHECK-NEXT: ret ptr addrspace(3) getelementptr (i8, ptr addrspace(3) null, i8 -2)
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;
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%gep = getelementptr i8, ptr addrspace(3) null, i8 -2
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ret ptr addrspace(3) %gep
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}
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define ptr addrspace(3) @test_inttoptr_base_external() {
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; CHECK-LABEL: define ptr addrspace(3) @test_inttoptr_base_external() {
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; CHECK-NEXT: ret ptr addrspace(3) getelementptr (i8, ptr addrspace(3) inttoptr (i16 -1 to ptr addrspace(3)), i8 1)
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;
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%base = inttoptr i16 -1 to ptr addrspace(3)
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%gep = getelementptr i8, ptr addrspace(3) %base, i8 1
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ret ptr addrspace(3) %gep
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}
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define <2 x ptr> @test_vec_null_base_normal() {
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; CHECK-LABEL: define <2 x ptr> @test_vec_null_base_normal() {
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; CHECK-NEXT: ret <2 x ptr> getelementptr (i8, <2 x ptr> splat (ptr null), <2 x i16> <i16 -2, i16 -3>)
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;
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%gep = getelementptr i8, <2 x ptr> <ptr null, ptr null>, <2 x i8> <i8 -2, i8 -3>
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ret <2 x ptr> %gep
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}
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define <2 x ptr> @test_vec_inttoptr_base_normal() {
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; CHECK-LABEL: define <2 x ptr> @test_vec_inttoptr_base_normal() {
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; CHECK-NEXT: ret <2 x ptr> getelementptr (i8, <2 x ptr> <ptr inttoptr (i16 -1 to ptr), ptr inttoptr (i16 -2 to ptr)>, <2 x i16> <i16 1, i16 2>)
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;
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%base = inttoptr <2 x i16> <i16 -1, i16 -2> to <2 x ptr>
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%gep = getelementptr i8, <2 x ptr> %base, <2 x i8> <i8 1, i8 2>
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ret <2 x ptr> %gep
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}
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;; Transformation is fine for non-integral address space, but we can only change
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;; the index bits: (i8 -2 == i16 254)
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define <2 x ptr addrspace(1)> @test_vec_null_base_nonintegral() {
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; CHECK-LABEL: define <2 x ptr addrspace(1)> @test_vec_null_base_nonintegral() {
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; CHECK-NEXT: ret <2 x ptr addrspace(1)> getelementptr (i8, <2 x ptr addrspace(1)> splat (ptr addrspace(1) null), <2 x i8> <i8 -2, i8 -3>)
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;
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%gep = getelementptr i8, <2 x ptr addrspace(1)> <ptr addrspace(1) null, ptr addrspace(1) null>, <2 x i8> <i8 -2, i8 -3>
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ret <2 x ptr addrspace(1)> %gep
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}
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define <2 x ptr addrspace(1)> @test_vec_inttoptr_base_nonintegral() {
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; CHECK-LABEL: define <2 x ptr addrspace(1)> @test_vec_inttoptr_base_nonintegral() {
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; CHECK-NEXT: ret <2 x ptr addrspace(1)> getelementptr (i8, <2 x ptr addrspace(1)> <ptr addrspace(1) inttoptr (i16 -1 to ptr addrspace(1)), ptr addrspace(1) inttoptr (i16 -2 to ptr addrspace(1))>, <2 x i8> <i8 1, i8 2>)
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;
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%base = inttoptr <2 x i16> <i16 -1, i16 -2> to <2 x ptr addrspace(1)>
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%gep = getelementptr i8, <2 x ptr addrspace(1)> %base, <2 x i8> <i8 1, i8 2>
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ret <2 x ptr addrspace(1)> %gep
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}
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;; For unstable pointers we should avoid any introduction of inttoptr
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define <2 x ptr addrspace(2)> @test_vec_null_base_unstable() {
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; CHECK-LABEL: define <2 x ptr addrspace(2)> @test_vec_null_base_unstable() {
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; CHECK-NEXT: ret <2 x ptr addrspace(2)> getelementptr (i8, <2 x ptr addrspace(2)> splat (ptr addrspace(2) null), <2 x i8> <i8 -2, i8 -3>)
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;
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%gep = getelementptr i8, <2 x ptr addrspace(2)> <ptr addrspace(2) null, ptr addrspace(2) null>, <2 x i8> <i8 -2, i8 -3>
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ret <2 x ptr addrspace(2)> %gep
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}
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define <2 x ptr addrspace(2)> @test_vec_inttoptr_base_unstable() {
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; CHECK-LABEL: define <2 x ptr addrspace(2)> @test_vec_inttoptr_base_unstable() {
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; CHECK-NEXT: ret <2 x ptr addrspace(2)> getelementptr (i8, <2 x ptr addrspace(2)> <ptr addrspace(2) inttoptr (i16 -1 to ptr addrspace(2)), ptr addrspace(2) inttoptr (i16 -2 to ptr addrspace(2))>, <2 x i8> <i8 1, i8 2>)
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;
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%base = inttoptr <2 x i16> <i16 -1, i16 -2> to <2 x ptr addrspace(2)>
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%gep = getelementptr i8, <2 x ptr addrspace(2)> %base, <2 x i8> <i8 1, i8 2>
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ret <2 x ptr addrspace(2)> %gep
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}
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;; The same is true for pointers with external state: no new inttoptr
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define <2 x ptr addrspace(3)> @test_vec_null_base_external() {
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; CHECK-LABEL: define <2 x ptr addrspace(3)> @test_vec_null_base_external() {
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; CHECK-NEXT: ret <2 x ptr addrspace(3)> getelementptr (i8, <2 x ptr addrspace(3)> splat (ptr addrspace(3) null), <2 x i8> <i8 -2, i8 -3>)
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;
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%gep = getelementptr i8, <2 x ptr addrspace(3)> <ptr addrspace(3) null, ptr addrspace(3) null>, <2 x i8> <i8 -2, i8 -3>
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ret <2 x ptr addrspace(3)> %gep
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}
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define <2 x ptr addrspace(3)> @test_vec_inttoptr_base_external() {
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; CHECK-LABEL: define <2 x ptr addrspace(3)> @test_vec_inttoptr_base_external() {
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; CHECK-NEXT: ret <2 x ptr addrspace(3)> getelementptr (i8, <2 x ptr addrspace(3)> <ptr addrspace(3) inttoptr (i16 -1 to ptr addrspace(3)), ptr addrspace(3) inttoptr (i16 -2 to ptr addrspace(3))>, <2 x i8> <i8 1, i8 2>)
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;
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%base = inttoptr <2 x i16> <i16 -1, i16 -2> to <2 x ptr addrspace(3)>
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%gep = getelementptr i8, <2 x ptr addrspace(3)> %base, <2 x i8> <i8 1, i8 2>
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ret <2 x ptr addrspace(3)> %gep
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}
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