f8d5a003fa
Conservatively treat unstable pointers as SCEVCouldNotCompute in getPtrToAddrExpr, and return SCEVUnknown when constructing from IR. This surfaced as part of the discussion in https://github.com/llvm/llvm-project/pull/178861. PR: https://github.com/llvm/llvm-project/pull/180718
161 lines
6.6 KiB
LLVM
161 lines
6.6 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_analyze_test_checks.py
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; RUN: opt -passes='print<scalar-evolution>' -disable-output %s 2>&1 | FileCheck %s
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; Address space 2 has unstable pointer representation.
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; Address space 3 has external state but stable representation.
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target datalayout="p:64:64:64:64-pu2:64:64:64:64-pe3:64:64:64:64"
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define void @ptrtoaddr(ptr %in, ptr %out0, ptr %out1, ptr %out2, ptr %out3) {
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; CHECK-LABEL: 'ptrtoaddr'
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; CHECK-NEXT: Classifying expressions for: @ptrtoaddr
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; CHECK-NEXT: %p0 = ptrtoaddr ptr %in to i64
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; CHECK-NEXT: --> (ptrtoaddr ptr %in to i64) U: full-set S: full-set
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; CHECK-NEXT: Determining loop execution counts for: @ptrtoaddr
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;
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%p0 = ptrtoaddr ptr %in to i64
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store i64 %p0, ptr %out0
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ret void
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}
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define void @ptrtoaddr_as1(ptr addrspace(1) %in, ptr %out0, ptr %out1, ptr %out2, ptr %out3) {
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; CHECK-LABEL: 'ptrtoaddr_as1'
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; CHECK-NEXT: Classifying expressions for: @ptrtoaddr_as1
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; CHECK-NEXT: %p0 = ptrtoaddr ptr addrspace(1) %in to i64
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; CHECK-NEXT: --> (ptrtoaddr ptr addrspace(1) %in to i64) U: full-set S: full-set
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; CHECK-NEXT: Determining loop execution counts for: @ptrtoaddr_as1
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;
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%p0 = ptrtoaddr ptr addrspace(1) %in to i64
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store i64 %p0, ptr %out0
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ret void
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}
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define void @ptrtoaddr_of_bitcast(ptr %in, ptr %out0) {
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; CHECK-LABEL: 'ptrtoaddr_of_bitcast'
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; CHECK-NEXT: Classifying expressions for: @ptrtoaddr_of_bitcast
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; CHECK-NEXT: %in_casted = bitcast ptr %in to ptr
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; CHECK-NEXT: --> %in U: full-set S: full-set
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; CHECK-NEXT: %p0 = ptrtoaddr ptr %in_casted to i64
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; CHECK-NEXT: --> (ptrtoaddr ptr %in to i64) U: full-set S: full-set
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; CHECK-NEXT: Determining loop execution counts for: @ptrtoaddr_of_bitcast
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;
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%in_casted = bitcast ptr %in to ptr
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%p0 = ptrtoaddr ptr %in_casted to i64
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store i64 %p0, ptr %out0
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ret void
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}
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define void @ptrtoaddr_of_nullptr(ptr %out0) {
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; CHECK-LABEL: 'ptrtoaddr_of_nullptr'
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; CHECK-NEXT: Classifying expressions for: @ptrtoaddr_of_nullptr
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; CHECK-NEXT: %p0 = ptrtoaddr ptr null to i64
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; CHECK-NEXT: --> 0 U: [0,1) S: [0,1)
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; CHECK-NEXT: Determining loop execution counts for: @ptrtoaddr_of_nullptr
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;
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%p0 = ptrtoaddr ptr null to i64
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store i64 %p0, ptr %out0
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ret void
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}
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define void @ptrtoaddr_of_gep(ptr %in, ptr %out0) {
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; CHECK-LABEL: 'ptrtoaddr_of_gep'
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; CHECK-NEXT: Classifying expressions for: @ptrtoaddr_of_gep
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; CHECK-NEXT: %in_adj = getelementptr inbounds i8, ptr %in, i64 42
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; CHECK-NEXT: --> (42 + %in) U: full-set S: full-set
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; CHECK-NEXT: %p0 = ptrtoaddr ptr %in_adj to i64
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; CHECK-NEXT: --> (42 + (ptrtoaddr ptr %in to i64)) U: full-set S: full-set
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; CHECK-NEXT: Determining loop execution counts for: @ptrtoaddr_of_gep
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;
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%in_adj = getelementptr inbounds i8, ptr %in, i64 42
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%p0 = ptrtoaddr ptr %in_adj to i64
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store i64 %p0, ptr %out0
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ret void
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}
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define void @ptrtoaddr_of_gep_with_unknown_int(ptr %in, ptr %out0, ptr %offset) {
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; CHECK-LABEL: 'ptrtoaddr_of_gep_with_unknown_int'
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; CHECK-NEXT: Classifying expressions for: @ptrtoaddr_of_gep_with_unknown_int
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; CHECK-NEXT: %l = load i64, ptr %offset, align 4
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; CHECK-NEXT: --> %l U: full-set S: full-set
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; CHECK-NEXT: %in_adj = getelementptr inbounds i8, ptr %in, i64 %l
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; CHECK-NEXT: --> (%l + %in) U: full-set S: full-set
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; CHECK-NEXT: %p0 = ptrtoaddr ptr %in_adj to i64
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; CHECK-NEXT: --> ((ptrtoaddr ptr %in to i64) + %l) U: full-set S: full-set
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; CHECK-NEXT: Determining loop execution counts for: @ptrtoaddr_of_gep_with_unknown_int
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;
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%l = load i64, ptr %offset
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%in_adj = getelementptr inbounds i8, ptr %in, i64 %l
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%p0 = ptrtoaddr ptr %in_adj to i64
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store i64 %p0, ptr %out0
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ret void
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}
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; ptrtoaddr of a pointer with unstable representation should return SCEVUnknown.
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define void @ptrtoaddr_unstable(ptr addrspace(2) %in, ptr %out) {
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; CHECK-LABEL: 'ptrtoaddr_unstable'
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; CHECK-NEXT: Classifying expressions for: @ptrtoaddr_unstable
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; CHECK-NEXT: %p = ptrtoaddr ptr addrspace(2) %in to i64
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; CHECK-NEXT: --> %p U: full-set S: full-set
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; CHECK-NEXT: Determining loop execution counts for: @ptrtoaddr_unstable
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;
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%p = ptrtoaddr ptr addrspace(2) %in to i64
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store i64 %p, ptr %out
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ret void
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}
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; ptrtoaddr of GEP on unstable pointer should return SCEVUnknown.
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define void @ptrtoaddr_unstable_gep(ptr addrspace(2) %in, ptr %out) {
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; CHECK-LABEL: 'ptrtoaddr_unstable_gep'
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; CHECK-NEXT: Classifying expressions for: @ptrtoaddr_unstable_gep
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; CHECK-NEXT: %gep = getelementptr inbounds i8, ptr addrspace(2) %in, i64 42
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; CHECK-NEXT: --> (42 + %in) U: full-set S: full-set
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; CHECK-NEXT: %p = ptrtoaddr ptr addrspace(2) %gep to i64
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; CHECK-NEXT: --> %p U: full-set S: full-set
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; CHECK-NEXT: Determining loop execution counts for: @ptrtoaddr_unstable_gep
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;
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%gep = getelementptr inbounds i8, ptr addrspace(2) %in, i64 42
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%p = ptrtoaddr ptr addrspace(2) %gep to i64
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store i64 %p, ptr %out
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ret void
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}
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; ptrtoaddr of nullptr in unstable address space should return SCEVUnknown.
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define void @ptrtoaddr_unstable_null(ptr %out) {
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; CHECK-LABEL: 'ptrtoaddr_unstable_null'
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; CHECK-NEXT: Classifying expressions for: @ptrtoaddr_unstable_null
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; CHECK-NEXT: %p = ptrtoaddr ptr addrspace(2) null to i64
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; CHECK-NEXT: --> %p U: [0,1) S: [0,1)
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; CHECK-NEXT: Determining loop execution counts for: @ptrtoaddr_unstable_null
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;
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%p = ptrtoaddr ptr addrspace(2) null to i64
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store i64 %p, ptr %out
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ret void
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}
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; Address space 3 is non-integral with external state but stable representation.
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define void @ptrtoaddr_nonintegral_stable(ptr addrspace(3) %in, ptr %out) {
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; CHECK-LABEL: 'ptrtoaddr_nonintegral_stable'
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; CHECK-NEXT: Classifying expressions for: @ptrtoaddr_nonintegral_stable
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; CHECK-NEXT: %p = ptrtoaddr ptr addrspace(3) %in to i64
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; CHECK-NEXT: --> (ptrtoaddr ptr addrspace(3) %in to i64) U: full-set S: full-set
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; CHECK-NEXT: Determining loop execution counts for: @ptrtoaddr_nonintegral_stable
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;
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%p = ptrtoaddr ptr addrspace(3) %in to i64
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store i64 %p, ptr %out
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ret void
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}
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define void @ptrtoaddr_nonintegral_stable_gep(ptr addrspace(3) %in, ptr %out) {
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; CHECK-LABEL: 'ptrtoaddr_nonintegral_stable_gep'
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; CHECK-NEXT: Classifying expressions for: @ptrtoaddr_nonintegral_stable_gep
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; CHECK-NEXT: %gep = getelementptr inbounds i8, ptr addrspace(3) %in, i64 42
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; CHECK-NEXT: --> (42 + %in) U: full-set S: full-set
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; CHECK-NEXT: %p = ptrtoaddr ptr addrspace(3) %gep to i64
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; CHECK-NEXT: --> (42 + (ptrtoaddr ptr addrspace(3) %in to i64)) U: full-set S: full-set
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; CHECK-NEXT: Determining loop execution counts for: @ptrtoaddr_nonintegral_stable_gep
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;
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%gep = getelementptr inbounds i8, ptr addrspace(3) %in, i64 42
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%p = ptrtoaddr ptr addrspace(3) %gep to i64
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store i64 %p, ptr %out
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ret void
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}
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