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; RUN: opt -print-memderefs -analyze -S <%s | FileCheck %s
; Uses the print-deref (+ analyze to print) pass to run
; isDereferenceablePointer() on many load instruction operands
target datalayout = "e"
declare zeroext i1 @return_i1()
declare i32* @foo()
@globalstr = global [6 x i8] c"hello\00"
@globali32ptr = external global i32*
%struct.A = type { [8 x i8], [5 x i8] }
@globalstruct = external global %struct.A
@globalptr.align1 = external global i8, align 1
@globalptr.align16 = external global i8, align 16
define void @test(i32 addrspace(1)* dereferenceable(8) %dparam,
i8 addrspace(1)* dereferenceable(32) align 1 %dparam.align1,
i8 addrspace(1)* dereferenceable(32) align 16 %dparam.align16)
gc "statepoint-example" {
; CHECK: The following are dereferenceable:
entry:
; CHECK: %globalptr{{.*}}(aligned)
%globalptr = getelementptr inbounds [6 x i8], [6 x i8]* @globalstr, i32 0, i32 0
%load1 = load i8, i8* %globalptr
; CHECK: %alloca{{.*}}(aligned)
%alloca = alloca i1
%load2 = load i1, i1* %alloca
; CHECK: %dparam{{.*}}(aligned)
%load3 = load i32, i32 addrspace(1)* %dparam
; CHECK: %relocate{{.*}}(aligned)
%tok = tail call i32 (i64, i32, i1 ()*, i32, i32, ...) @llvm.experimental.gc.statepoint.p0f_i1f(i64 0, i32 0, i1 ()* @return_i1, i32 0, i32 0, i32 0, i32 0, i32 addrspace(1)* %dparam)
%relocate = call i32 addrspace(1)* @llvm.experimental.gc.relocate.p1i32(i32 %tok, i32 7, i32 7)
%load4 = load i32, i32 addrspace(1)* %relocate
; CHECK-NOT: %nparam
%nparam = getelementptr i32, i32 addrspace(1)* %dparam, i32 5
%load5 = load i32, i32 addrspace(1)* %nparam
; Load from a non-dereferenceable load
; CHECK-NOT: %nd_load
%nd_load = load i32*, i32** @globali32ptr
%load6 = load i32, i32* %nd_load
; Load from a dereferenceable load
; CHECK: %d4_load{{.*}}(aligned)
%d4_load = load i32*, i32** @globali32ptr, !dereferenceable !0
%load7 = load i32, i32* %d4_load
; Load from an offset not covered by the dereferenceable portion
; CHECK-NOT: %d2_load
%d2_load = load i32*, i32** @globali32ptr, !dereferenceable !1
%load8 = load i32, i32* %d2_load
; Load from a potentially null pointer with dereferenceable_or_null
; CHECK-NOT: %d_or_null_load
%d_or_null_load = load i32*, i32** @globali32ptr, !dereferenceable_or_null !0
%load9 = load i32, i32* %d_or_null_load
; Load from a non-null pointer with dereferenceable_or_null
; CHECK: %d_or_null_non_null_load{{.*}}(aligned)
%d_or_null_non_null_load = load i32*, i32** @globali32ptr, !nonnull !2, !dereferenceable_or_null !0
%load10 = load i32, i32* %d_or_null_non_null_load
; It's OK to overrun static array size as long as we stay within underlying object size
; CHECK: %within_allocation{{.*}}(aligned)
%within_allocation = getelementptr inbounds %struct.A, %struct.A* @globalstruct, i64 0, i32 0, i64 10
%load11 = load i8, i8* %within_allocation
; GEP is outside the underlying object size
; CHECK-NOT: %outside_allocation
%outside_allocation = getelementptr inbounds %struct.A, %struct.A* @globalstruct, i64 0, i32 1, i64 10
%load12 = load i8, i8* %outside_allocation
; Loads from aligned globals
; CHECK: @globalptr.align1{{.*}}(unaligned)
; CHECK: @globalptr.align16{{.*}}(aligned)
%load13 = load i8, i8* @globalptr.align1, align 16
%load14 = load i8, i8* @globalptr.align16, align 16
; Loads from aligned arguments
; CHECK: %dparam.align1{{.*}}(unaligned)
; CHECK: %dparam.align16{{.*}}(aligned)
%load15 = load i8, i8 addrspace(1)* %dparam.align1, align 16
%load16 = load i8, i8 addrspace(1)* %dparam.align16, align 16
; Loads from aligned allocas
; CHECK: %alloca.align1{{.*}}(unaligned)
; CHECK: %alloca.align16{{.*}}(aligned)
%alloca.align1 = alloca i1, align 1
%alloca.align16 = alloca i1, align 16
%load17 = load i1, i1* %alloca.align1, align 16
%load18 = load i1, i1* %alloca.align16, align 16
; Loads from GEPs
; CHECK: %gep.align1.offset1{{.*}}(unaligned)
; CHECK: %gep.align16.offset1{{.*}}(unaligned)
; CHECK: %gep.align1.offset16{{.*}}(unaligned)
; CHECK: %gep.align16.offset16{{.*}}(aligned)
%gep.align1.offset1 = getelementptr inbounds i8, i8 addrspace(1)* %dparam.align1, i32 1
%gep.align16.offset1 = getelementptr inbounds i8, i8 addrspace(1)* %dparam.align16, i32 1
%gep.align1.offset16 = getelementptr inbounds i8, i8 addrspace(1)* %dparam.align1, i32 16
%gep.align16.offset16 = getelementptr inbounds i8, i8 addrspace(1)* %dparam.align16, i32 16
%load19 = load i8, i8 addrspace(1)* %gep.align1.offset1, align 16
%load20 = load i8, i8 addrspace(1)* %gep.align16.offset1, align 16
%load21 = load i8, i8 addrspace(1)* %gep.align1.offset16, align 16
%load22 = load i8, i8 addrspace(1)* %gep.align16.offset16, align 16
; CHECK-NOT: %no_deref_return
; CHECK: %deref_return{{.*}}(unaligned)
; CHECK: %deref_and_aligned_return{{.*}}(aligned)
%no_deref_return = call i32* @foo()
%deref_return = call dereferenceable(32) i32* @foo()
%deref_and_aligned_return = call dereferenceable(32) align 16 i32* @foo()
%load23 = load i32, i32* %no_deref_return
%load24 = load i32, i32* %deref_return, align 16
%load25 = load i32, i32* %deref_and_aligned_return, align 16
; Load from a dereferenceable and aligned load
; CHECK: %d4_unaligned_load{{.*}}(unaligned)
; CHECK: %d4_aligned_load{{.*}}(aligned)
%d4_unaligned_load = load i32*, i32** @globali32ptr, !dereferenceable !0
%d4_aligned_load = load i32*, i32** @globali32ptr, !dereferenceable !0, !align !{i64 16}
%load26 = load i32, i32* %d4_unaligned_load, align 16
%load27 = load i32, i32* %d4_aligned_load, align 16
ret void
}
declare i32 @llvm.experimental.gc.statepoint.p0f_i1f(i64, i32, i1 ()*, i32, i32, ...)
declare i32 addrspace(1)* @llvm.experimental.gc.relocate.p1i32(i32, i32, i32)
!0 = !{i64 4}
!1 = !{i64 2}
!2 = !{}
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