; RUN: opt -S -passes="print<stack-safety-local>" -disable-output < %s 2>&1 | FileCheck %s --check-prefixes=CHECK,LOCAL
; RUN: opt -S -passes="print-stack-safety" -disable-output < %s 2>&1 | FileCheck %s --check-prefixes=CHECK,GLOBAL
target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"
target triple = "x86_64-unknown-linux-gnu"
@sink = global i8* null, align 8
declare void @llvm.memset.p0i8.i32(i8* %dest, i8 %val, i32 %len, i1 %isvolatile)
declare void @llvm.memcpy.p0i8.p0i8.i32(i8* %dest, i8* %src, i32 %len, i1 %isvolatile)
declare void @llvm.memmove.p0i8.p0i8.i32(i8* %dest, i8* %src, i32 %len, i1 %isvolatile)
declare void @llvm.memset.p0i8.i64(i8* %dest, i8 %val, i64 %len, i1 %isvolatile)
declare void @unknown_call(i8* %dest)
declare i8* @retptr(i8* returned)
; Address leaked.
define void @LeakAddress() {
; CHECK-LABEL: @LeakAddress dso_preemptable{{$}}
; CHECK-NEXT: args uses:
; CHECK-NEXT: allocas uses:
; CHECK-NEXT: x[4]: full-set{{$}}
; GLOBAL-NEXT: safe accesses:
; CHECK-EMPTY:
entry:
%x = alloca i32, align 4
%x1 = bitcast i32* %x to i8*
store i8* %x1, i8** @sink, align 8
ret void
}
define void @StoreInBounds() {
; CHECK-LABEL: @StoreInBounds dso_preemptable{{$}}
; CHECK-NEXT: args uses:
; CHECK-NEXT: allocas uses:
; CHECK-NEXT: x[4]: [0,1){{$}}
; GLOBAL-NEXT: safe accesses:
; GLOBAL-NEXT: store i8 0, i8* %x1, align 1
; CHECK-EMPTY:
entry:
%x = alloca i32, align 4
%x1 = bitcast i32* %x to i8*
store i8 0, i8* %x1, align 1
ret void
}
define void @StoreInBoundsCond(i64 %i) {
; CHECK-LABEL: @StoreInBoundsCond dso_preemptable{{$}}
; CHECK-NEXT: args uses:
; CHECK-NEXT: allocas uses:
; CHECK-NEXT: x[4]: full-set{{$}}
; GLOBAL-NEXT: safe accesses:
; GLOBAL-NEXT: store i8 0, i8* %x2, align 1
; CHECK-EMPTY:
entry:
%x = alloca i32, align 4
%x1 = bitcast i32* %x to i8*
%c1 = icmp sge i64 %i, 0
%c2 = icmp slt i64 %i, 4
br i1 %c1, label %c1.true, label %false
c1.true:
br i1 %c2, label %c2.true, label %false
c2.true:
%x2 = getelementptr i8, i8* %x1, i64 %i
store i8 0, i8* %x2, align 1
br label %false
false:
ret void
}
define void @StoreInBoundsMinMax(i64 %i) {
; CHECK-LABEL: @StoreInBoundsMinMax dso_preemptable{{$}}
; CHECK-NEXT: args uses:
; CHECK-NEXT: allocas uses:
; CHECK-NEXT: x[4]: [0,4){{$}}
; GLOBAL-NEXT: safe accesses:
; GLOBAL-NEXT: store i8 0, i8* %x2, align 1
; CHECK-EMPTY:
entry:
%x = alloca i32, align 4
%x1 = bitcast i32* %x to i8*
%c1 = icmp sge i64 %i, 0
%i1 = select i1 %c1, i64 %i, i64 0
%c2 = icmp slt i64 %i1, 3
%i2 = select i1 %c2, i64 %i1, i64 3
%x2 = getelementptr i8, i8* %x1, i64 %i2
store i8 0, i8* %x2, align 1
ret void
}
define void @StoreInBounds2() {
; CHECK-LABEL: @StoreInBounds2 dso_preemptable{{$}}
; CHECK-NEXT: args uses:
; CHECK-NEXT: allocas uses:
; CHECK-NEXT: x[4]: [0,4){{$}}
; GLOBAL-NEXT: safe accesses:
; GLOBAL-NEXT: store i32 0, i32* %x, align 4
; CHECK-EMPTY:
entry:
%x = alloca i32, align 4
store i32 0, i32* %x, align 4
ret void
}
define void @StoreInBounds3() {
; CHECK-LABEL: @StoreInBounds3 dso_preemptable{{$}}
; CHECK-NEXT: args uses:
; CHECK-NEXT: allocas uses:
; CHECK-NEXT: x[4]: [2,3){{$}}
; GLOBAL-NEXT: safe accesses:
; GLOBAL-NEXT: store i8 0, i8* %x2, align 1
; CHECK-EMPTY:
entry:
%x = alloca i32, align 4
%x1 = bitcast i32* %x to i8*
%x2 = getelementptr i8, i8* %x1, i64 2
store i8 0, i8* %x2, align 1
ret void
}
; FIXME: ScalarEvolution does not look through ptrtoint/inttoptr.
define void @StoreInBounds4() {
; CHECK-LABEL: @StoreInBounds4 dso_preemptable{{$}}
; CHECK-NEXT: args uses:
; CHECK-NEXT: allocas uses:
; CHECK-NEXT: x[4]: full-set{{$}}
; GLOBAL-NEXT: safe accesses:
; CHECK-EMPTY:
entry:
%x = alloca i32, align 4
%x1 = ptrtoint i32* %x to i64
%x2 = add i64 %x1, 2
%x3 = inttoptr i64 %x2 to i8*
store i8 0, i8* %x3, align 1
ret void
}
define void @StoreInBounds6() {
; CHECK-LABEL: @StoreInBounds6 dso_preemptable{{$}}
; CHECK-NEXT: args uses:
; CHECK-NEXT: allocas uses:
; GLOBAL-NEXT: x[4]: full-set, @retptr(arg0, [0,1)){{$}}
; LOCAL-NEXT: x[4]: [0,1), @retptr(arg0, [0,1)){{$}}
; GLOBAL-NEXT: safe accesses:
; GLOBAL-NEXT: store i8 0, i8* %x2, align 1
; CHECK-EMPTY:
entry:
%x = alloca i32, align 4
%x1 = bitcast i32* %x to i8*
%x2 = call i8* @retptr(i8* %x1)
store i8 0, i8* %x2, align 1
ret void
}
define dso_local void @WriteMinMax(i8* %p) {
; CHECK-LABEL: @WriteMinMax{{$}}
; CHECK-NEXT: args uses:
; CHECK-NEXT: p[]: full-set
; CHECK-NEXT: allocas uses:
; GLOBAL-NEXT: safe accesses:
; GLOBAL-NEXT: store i8 0, i8* %p1, align 1
; GLOBAL-NEXT: store i8 0, i8* %p2, align 1
; CHECK-EMPTY:
entry:
%p1 = getelementptr i8, i8* %p, i64 9223372036854775805
store i8 0, i8* %p1, align 1
%p2 = getelementptr i8, i8* %p, i64 -9223372036854775805
store i8 0, i8* %p2, align 1
ret void
}
define dso_local void @WriteMax(i8* %p) {
; CHECK-LABEL: @WriteMax{{$}}
; CHECK-NEXT: args uses:
; CHECK-NEXT: p[]: [-9223372036854775807,9223372036854775806)
; CHECK-NEXT: allocas uses:
; GLOBAL-NEXT: safe accesses:
; GLOBAL-NEXT: call void @llvm.memset.p0i8.i64(i8* %p, i8 1, i64 9223372036854775806, i1 false)
; GLOBAL-NEXT: call void @llvm.memset.p0i8.i64(i8* %p2, i8 1, i64 9223372036854775806, i1 false)
; CHECK-EMPTY:
entry:
call void @llvm.memset.p0i8.i64(i8* %p, i8 1, i64 9223372036854775806, i1 0)
%p2 = getelementptr i8, i8* %p, i64 -9223372036854775807
call void @llvm.memset.p0i8.i64(i8* %p2, i8 1, i64 9223372036854775806, i1 0)
ret void
}
define void @StoreOutOfBounds() {
; CHECK-LABEL: @StoreOutOfBounds dso_preemptable{{$}}
; CHECK-NEXT: args uses:
; CHECK-NEXT: allocas uses:
; CHECK-NEXT: x[4]: [2,6){{$}}
; GLOBAL-NEXT: safe accesses:
; CHECK-EMPTY:
entry:
%x = alloca i32, align 4
%x1 = bitcast i32* %x to i8*
%x2 = getelementptr i8, i8* %x1, i64 2
%x3 = bitcast i8* %x2 to i32*
store i32 0, i32* %x3, align 1
ret void
}
define void @StoreOutOfBoundsCond(i64 %i) {
; CHECK-LABEL: @StoreOutOfBoundsCond dso_preemptable{{$}}
; CHECK-NEXT: args uses:
; CHECK-NEXT: allocas uses:
; CHECK-NEXT: x[4]: full-set{{$}}
; GLOBAL-NEXT: safe accesses:
; CHECK-EMPTY:
entry:
%x = alloca i32, align 4
%x1 = bitcast i32* %x to i8*
%c1 = icmp sge i64 %i, 0
%c2 = icmp slt i64 %i, 5
br i1 %c1, label %c1.true, label %false
c1.true:
br i1 %c2, label %c2.true, label %false
c2.true:
%x2 = getelementptr i8, i8* %x1, i64 %i
store i8 0, i8* %x2, align 1
br label %false
false:
ret void
}
define void @StoreOutOfBoundsCond2(i64 %i) {
; CHECK-LABEL: @StoreOutOfBoundsCond2 dso_preemptable{{$}}
; CHECK-NEXT: args uses:
; CHECK-NEXT: allocas uses:
; CHECK-NEXT: x[4]: full-set{{$}}
; GLOBAL-NEXT: safe accesses:
; CHECK-EMPTY:
entry:
%x = alloca i32, align 4
%x1 = bitcast i32* %x to i8*
%c2 = icmp slt i64 %i, 5
br i1 %c2, label %c2.true, label %false
c2.true:
%x2 = getelementptr i8, i8* %x1, i64 %i
store i8 0, i8* %x2, align 1
br label %false
false:
ret void
}
define void @StoreOutOfBounds2() {
; CHECK-LABEL: @StoreOutOfBounds2 dso_preemptable{{$}}
; CHECK-NEXT: args uses:
; CHECK-NEXT: allocas uses:
; GLOBAL-NEXT: x[4]: full-set, @retptr(arg0, [2,3)){{$}}
; LOCAL-NEXT: x[4]: [2,6), @retptr(arg0, [2,3)){{$}}
; GLOBAL-NEXT: safe accesses:
; CHECK-EMPTY:
entry:
%x = alloca i32, align 4
%x1 = bitcast i32* %x to i8*
%x2 = getelementptr i8, i8* %x1, i64 2
%x3 = call i8* @retptr(i8* %x2)
%x4 = bitcast i8* %x3 to i32*
store i32 0, i32* %x4, align 1
ret void
}
; There is no difference in load vs store handling.
define void @LoadInBounds() {
; CHECK-LABEL: @LoadInBounds dso_preemptable{{$}}
; CHECK-NEXT: args uses:
; CHECK-NEXT: allocas uses:
; CHECK-NEXT: x[4]: [0,1){{$}}
; GLOBAL-NEXT: safe accesses:
; GLOBAL-NEXT: %v = load i8, i8* %x1, align 1
; CHECK-EMPTY:
entry:
%x = alloca i32, align 4
%x1 = bitcast i32* %x to i8*
%v = load i8, i8* %x1, align 1
ret void
}
define void @LoadOutOfBounds() {
; CHECK-LABEL: @LoadOutOfBounds dso_preemptable{{$}}
; CHECK-NEXT: args uses:
; CHECK-NEXT: allocas uses:
; CHECK-NEXT: x[4]: [2,6){{$}}
; GLOBAL-NEXT: safe accesses:
; CHECK-EMPTY:
entry:
%x = alloca i32, align 4
%x1 = bitcast i32* %x to i8*
%x2 = getelementptr i8, i8* %x1, i64 2
%x3 = bitcast i8* %x2 to i32*
%v = load i32, i32* %x3, align 1
ret void
}
; Leak through ret.
define i8* @Ret() {
; CHECK-LABEL: @Ret dso_preemptable{{$}}
; CHECK-NEXT: args uses:
; CHECK-NEXT: allocas uses:
; CHECK-NEXT: x[4]: full-set{{$}}
; GLOBAL-NEXT: safe accesses:
; CHECK-EMPTY:
entry:
%x = alloca i32, align 4
%x1 = bitcast i32* %x to i8*
%x2 = getelementptr i8, i8* %x1, i64 2
ret i8* %x2
}
declare void @Foo(i16* %p)
define void @DirectCall() {
; CHECK-LABEL: @DirectCall dso_preemptable{{$}}
; CHECK-NEXT: args uses:
; CHECK-NEXT: allocas uses:
; LOCAL-NEXT: x[8]: empty-set, @Foo(arg0, [2,3)){{$}}
; GLOBAL-NEXT: x[8]: full-set, @Foo(arg0, [2,3)){{$}}
; GLOBAL-NEXT: safe accesses:
; CHECK-EMPTY:
entry:
%x = alloca i64, align 4
%x1 = bitcast i64* %x to i16*
%x2 = getelementptr i16, i16* %x1, i64 1
call void @Foo(i16* %x2);
ret void
}
; Indirect calls can not be analyzed (yet).
; FIXME: %p[]: full-set looks invalid
define void @IndirectCall(void (i8*)* %p) {
; CHECK-LABEL: @IndirectCall dso_preemptable{{$}}
; CHECK-NEXT: args uses:
; CHECK-NEXT: p[]: full-set{{$}}
; CHECK-NEXT: allocas uses:
; CHECK-NEXT: x[4]: full-set{{$}}
; GLOBAL-NEXT: safe accesses:
; CHECK-EMPTY:
entry:
%x = alloca i32, align 4
%x1 = bitcast i32* %x to i8*
call void %p(i8* %x1);
ret void
}
define void @NonConstantOffset(i1 zeroext %z) {
; CHECK-LABEL: @NonConstantOffset dso_preemptable{{$}}
; CHECK-NEXT: args uses:
; CHECK-NEXT: allocas uses:
; FIXME: SCEV can't look through selects.
; CHECK-NEXT: x[4]: [0,4){{$}}
; GLOBAL-NEXT: safe accesses:
; GLOBAL-NEXT: store i8 0, i8* %x2, align 1
; CHECK-EMPTY:
entry:
%x = alloca i32, align 4
%x1 = bitcast i32* %x to i8*
%idx = select i1 %z, i64 1, i64 2
%x2 = getelementptr i8, i8* %x1, i64 %idx
store i8 0, i8* %x2, align 1
ret void
}
define void @NegativeOffset() {
; CHECK-LABEL: @NegativeOffset dso_preemptable{{$}}
; CHECK-NEXT: args uses:
; CHECK-NEXT: allocas uses:
; CHECK-NEXT: x[40]: [-1600000000000,-1599999999996){{$}}
; GLOBAL-NEXT: safe accesses:
; CHECK-EMPTY:
entry:
%x = alloca i32, i32 10, align 4
%x2 = getelementptr i32, i32* %x, i64 -400000000000
store i32 0, i32* %x2, align 1
ret void
}
define void @PossiblyNegativeOffset(i16 %z) {
; CHECK-LABEL: @PossiblyNegativeOffset dso_preemptable{{$}}
; CHECK-NEXT: args uses:
; CHECK-NEXT: allocas uses:
; CHECK-NEXT: x[40]: [-131072,131072){{$}}
; GLOBAL-NEXT: safe accesses:
; CHECK-EMPTY:
entry:
%x = alloca i32, i32 10, align 4
%x2 = getelementptr i32, i32* %x, i16 %z
store i32 0, i32* %x2, align 1
ret void
}
define void @NonConstantOffsetOOB(i1 zeroext %z) {
; CHECK-LABEL: @NonConstantOffsetOOB dso_preemptable{{$}}
; CHECK-NEXT: args uses:
; CHECK-NEXT: allocas uses:
; CHECK-NEXT: x[4]: [0,6){{$}}
; GLOBAL-NEXT: safe accesses:
; CHECK-EMPTY:
entry:
%x = alloca i32, align 4
%x1 = bitcast i32* %x to i8*
%idx = select i1 %z, i64 1, i64 4
%x2 = getelementptr i8, i8* %x1, i64 %idx
store i8 0, i8* %x2, align 1
ret void
}
define void @ArrayAlloca() {
; CHECK-LABEL: @ArrayAlloca dso_preemptable{{$}}
; CHECK-NEXT: args uses:
; CHECK-NEXT: allocas uses:
; CHECK-NEXT: x[40]: [36,40){{$}}
; GLOBAL-NEXT: safe accesses:
; GLOBAL-NEXT: store i32 0, i32* %x3, align 1
; CHECK-EMPTY:
entry:
%x = alloca i32, i32 10, align 4
%x1 = bitcast i32* %x to i8*
%x2 = getelementptr i8, i8* %x1, i64 36
%x3 = bitcast i8* %x2 to i32*
store i32 0, i32* %x3, align 1
ret void
}
define void @ArrayAllocaOOB() {
; CHECK-LABEL: @ArrayAllocaOOB dso_preemptable{{$}}
; CHECK-NEXT: args uses:
; CHECK-NEXT: allocas uses:
; CHECK-NEXT: x[40]: [37,41){{$}}
; GLOBAL-NEXT: safe accesses:
; CHECK-EMPTY:
entry:
%x = alloca i32, i32 10, align 4
%x1 = bitcast i32* %x to i8*
%x2 = getelementptr i8, i8* %x1, i64 37
%x3 = bitcast i8* %x2 to i32*
store i32 0, i32* %x3, align 1
ret void
}
define void @DynamicAllocaUnused(i64 %size) {
; CHECK-LABEL: @DynamicAllocaUnused dso_preemptable{{$}}
; CHECK-NEXT: args uses:
; CHECK-NEXT: allocas uses:
; CHECK-NEXT: x[0]: empty-set{{$}}
; GLOBAL-NEXT: safe accesses:
; CHECK-EMPTY:
entry:
%x = alloca i32, i64 %size, align 16
ret void
}
; Dynamic alloca with unknown size.
define void @DynamicAlloca(i64 %size) {
; CHECK-LABEL: @DynamicAlloca dso_preemptable{{$}}
; CHECK-NEXT: args uses:
; CHECK-NEXT: allocas uses:
; CHECK-NEXT: x[0]: [0,4){{$}}
; GLOBAL-NEXT: safe accesses:
; CHECK-EMPTY:
entry:
%x = alloca i32, i64 %size, align 16
store i32 0, i32* %x, align 1
ret void
}
; Dynamic alloca with limited size.
; FIXME: could be proved safe. Implement.
define void @DynamicAllocaFiniteSizeRange(i1 zeroext %z) {
; CHECK-LABEL: @DynamicAllocaFiniteSizeRange dso_preemptable{{$}}
; CHECK-NEXT: args uses:
; CHECK-NEXT: allocas uses:
; CHECK-NEXT: x[0]: [0,4){{$}}
; GLOBAL-NEXT: safe accesses:
; CHECK-EMPTY:
entry:
%size = select i1 %z, i64 3, i64 5
%x = alloca i32, i64 %size, align 16
store i32 0, i32* %x, align 1
ret void
}
define signext i8 @SimpleLoop() {
; CHECK-LABEL: @SimpleLoop dso_preemptable{{$}}
; CHECK-NEXT: args uses:
; CHECK-NEXT: allocas uses:
; CHECK-NEXT: x[10]: [0,10){{$}}
; GLOBAL-NEXT: safe accesses:
; GLOBAL-NEXT: %1 = load volatile i8, i8* %p.09, align 1
; CHECK-EMPTY:
entry:
%x = alloca [10 x i8], align 1
%0 = getelementptr inbounds [10 x i8], [10 x i8]* %x, i64 0, i64 0
%lftr.limit = getelementptr inbounds [10 x i8], [10 x i8]* %x, i64 0, i64 10
br label %for.body
for.body:
%sum.010 = phi i8 [ 0, %entry ], [ %add, %for.body ]
%p.09 = phi i8* [ %0, %entry ], [ %incdec.ptr, %for.body ]
%incdec.ptr = getelementptr inbounds i8, i8* %p.09, i64 1
%1 = load volatile i8, i8* %p.09, align 1
%add = add i8 %1, %sum.010
%exitcond = icmp eq i8* %incdec.ptr, %lftr.limit
br i1 %exitcond, label %for.cond.cleanup, label %for.body
for.cond.cleanup:
ret i8 %add
}
; OOB in a loop.
define signext i8 @SimpleLoopOOB() {
; CHECK-LABEL: @SimpleLoopOOB dso_preemptable{{$}}
; CHECK-NEXT: args uses:
; CHECK-NEXT: allocas uses:
; CHECK-NEXT: x[10]: [0,11){{$}}
; GLOBAL-NEXT: safe accesses:
; CHECK-EMPTY:
entry:
%x = alloca [10 x i8], align 1
%0 = getelementptr inbounds [10 x i8], [10 x i8]* %x, i64 0, i64 0
; 11 iterations
%lftr.limit = getelementptr inbounds [10 x i8], [10 x i8]* %x, i64 0, i64 11
br label %for.body
for.body:
%sum.010 = phi i8 [ 0, %entry ], [ %add, %for.body ]
%p.09 = phi i8* [ %0, %entry ], [ %incdec.ptr, %for.body ]
%incdec.ptr = getelementptr inbounds i8, i8* %p.09, i64 1
%1 = load volatile i8, i8* %p.09, align 1
%add = add i8 %1, %sum.010
%exitcond = icmp eq i8* %incdec.ptr, %lftr.limit
br i1 %exitcond, label %for.cond.cleanup, label %for.body
for.cond.cleanup:
ret i8 %add
}
define dso_local void @SizeCheck(i32 %sz) {
; CHECK-LABEL: @SizeCheck{{$}}
; CHECK-NEXT: args uses:
; CHECK-NEXT: allocas uses:
; CHECK-NEXT: x1[128]: [0,4294967295){{$}}
; GLOBAL-NEXT: safe accesses:
; CHECK-EMPTY:
entry:
%x1 = alloca [128 x i8], align 16
%x1.sub = getelementptr inbounds [128 x i8], [128 x i8]* %x1, i64 0, i64 0
%cmp = icmp slt i32 %sz, 129
br i1 %cmp, label %if.then, label %if.end
if.then:
call void @llvm.memset.p0i8.i32(i8* nonnull align 16 %x1.sub, i8 0, i32 %sz, i1 false)
br label %if.end
if.end:
ret void
}
; FIXME: scalable allocas are considered to be of size zero, and scalable accesses to be full-range.
; This effectively disables safety analysis for scalable allocations.
define void @Scalable(<vscale x 4 x i32>* %p, <vscale x 4 x i32>* %unused, <vscale x 4 x i32> %v) {
; CHECK-LABEL: @Scalable dso_preemptable{{$}}
; CHECK-NEXT: args uses:
; CHECK-NEXT: p[]: full-set
; CHECK-NEXT: unused[]: empty-set
; CHECK-NEXT: allocas uses:
; CHECK-NEXT: x[0]: [0,1){{$}}
; GLOBAL-NEXT: safe accesses:
; GLOBAL-NEXT: store <vscale x 4 x i32> %v, <vscale x 4 x i32>* %p, align 4
; CHECK-EMPTY:
entry:
%x = alloca <vscale x 4 x i32>, align 4
%x1 = bitcast <vscale x 4 x i32>* %x to i8*
store i8 0, i8* %x1, align 1
store <vscale x 4 x i32> %v, <vscale x 4 x i32>* %p, align 4
ret void
}
%zerosize_type = type {}
define void @ZeroSize(%zerosize_type *%p) {
; CHECK-LABEL: @ZeroSize dso_preemptable{{$}}
; CHECK-NEXT: args uses:
; CHECK-NEXT: p[]: empty-set
; CHECK-NEXT: allocas uses:
; CHECK-NEXT: x[0]: empty-set
; GLOBAL-NEXT: safe accesses:
; GLOBAL-NEXT: store %zerosize_type undef, %zerosize_type* %x, align 4
; GLOBAL-NEXT: store %zerosize_type undef, %zerosize_type* undef, align 4
; GLOBAL-NEXT: load %zerosize_type, %zerosize_type* %p, align
; CHECK-EMPTY:
entry:
%x = alloca %zerosize_type, align 4
store %zerosize_type undef, %zerosize_type* %x, align 4
store %zerosize_type undef, %zerosize_type* undef, align 4
%val = load %zerosize_type, %zerosize_type* %p, align 4
ret void
}
define void @OperandBundle() {
; CHECK-LABEL: @OperandBundle dso_preemptable{{$}}
; CHECK-NEXT: args uses:
; CHECK-NEXT: allocas uses:
; CHECK-NEXT: a[4]: full-set
; GLOBAL-NEXT: safe accesses:
; CHECK-EMPTY:
entry:
%a = alloca i32, align 4
call void @LeakAddress() ["unknown"(i32* %a)]
ret void
}
define void @ByVal(i16* byval(i16) %p) {
; CHECK-LABEL: @ByVal dso_preemptable{{$}}
; CHECK-NEXT: args uses:
; CHECK-NEXT: allocas uses:
; GLOBAL-NEXT: safe accesses:
; CHECK-EMPTY:
entry:
ret void
}
define void @TestByVal() {
; CHECK-LABEL: @TestByVal dso_preemptable{{$}}
; CHECK-NEXT: args uses:
; CHECK-NEXT: allocas uses:
; CHECK-NEXT: x[2]: [0,2)
; CHECK-NEXT: y[8]: [0,2)
; GLOBAL-NEXT: safe accesses:
; GLOBAL-NEXT: call void @ByVal(i16* byval(i16) %x)
; GLOBAL-NEXT: call void @ByVal(i16* byval(i16) %y1)
; CHECK-EMPTY:
entry:
%x = alloca i16, align 4
call void @ByVal(i16* byval(i16) %x)
%y = alloca i64, align 4
%y1 = bitcast i64* %y to i16*
call void @ByVal(i16* byval(i16) %y1)
ret void
}
declare void @ByValArray([100000 x i64]* byval([100000 x i64]) %p)
define void @TestByValArray() {
; CHECK-LABEL: @TestByValArray dso_preemptable{{$}}
; CHECK-NEXT: args uses:
; CHECK-NEXT: allocas uses:
; CHECK-NEXT: z[800000]: [500000,1300000)
; GLOBAL-NEXT: safe accesses:
; CHECK-EMPTY:
entry:
%z = alloca [100000 x i64], align 4
%z1 = bitcast [100000 x i64]* %z to i8*
%z2 = getelementptr i8, i8* %z1, i64 500000
%z3 = bitcast i8* %z2 to [100000 x i64]*
call void @ByValArray([100000 x i64]* byval([100000 x i64]) %z3)
ret void
}
define dso_local i8 @LoadMinInt64(i8* %p) {
; CHECK-LABEL: @LoadMinInt64{{$}}
; CHECK-NEXT: args uses:
; CHECK-NEXT: p[]: [-9223372036854775808,-9223372036854775807){{$}}
; CHECK-NEXT: allocas uses:
; GLOBAL-NEXT: safe accesses:
; GLOBAL-NEXT: load i8, i8* %p2, align 1
; CHECK-EMPTY:
%p2 = getelementptr i8, i8* %p, i64 -9223372036854775808
%v = load i8, i8* %p2, align 1
ret i8 %v
}
define void @Overflow() {
; CHECK-LABEL: @Overflow dso_preemptable{{$}}
; CHECK-NEXT: args uses:
; CHECK-NEXT: allocas uses:
; LOCAL-NEXT: x[1]: empty-set, @LoadMinInt64(arg0, [-9223372036854775808,-9223372036854775807)){{$}}
; GLOBAL-NEXT: x[1]: full-set, @LoadMinInt64(arg0, [-9223372036854775808,-9223372036854775807)){{$}}
; GLOBAL-NEXT: safe accesses:
; CHECK-EMPTY:
entry:
%x = alloca i8, align 4
%x2 = getelementptr i8, i8* %x, i64 -9223372036854775808
%v = call i8 @LoadMinInt64(i8* %x2)
ret void
}
define void @DeadBlock(i64* %p) {
; CHECK-LABEL: @DeadBlock dso_preemptable{{$}}
; CHECK-NEXT: args uses:
; CHECK-NEXT: p[]: empty-set{{$}}
; CHECK-NEXT: allocas uses:
; CHECK-NEXT: x[1]: empty-set{{$}}
; GLOBAL-NEXT: safe accesses:
; GLOBAL-NEXT: store i8 5, i8* %x
; GLOBAL-NEXT: store i64 -5, i64* %p
; CHECK-EMPTY:
entry:
%x = alloca i8, align 4
br label %end
dead:
store i8 5, i8* %x
store i64 -5, i64* %p
br label %end
end:
ret void
}
define void @LifeNotStarted() {
; CHECK-LABEL: @LifeNotStarted dso_preemptable{{$}}
; CHECK-NEXT: args uses:
; CHECK-NEXT: allocas uses:
; CHECK: x[1]: full-set{{$}}
; CHECK: y[1]: full-set{{$}}
; CHECK: z[1]: full-set{{$}}
; GLOBAL-NEXT: safe accesses:
; CHECK-EMPTY:
entry:
%x = alloca i8, align 4
%y = alloca i8, align 4
%z = alloca i8, align 4
store i8 5, i8* %x
%n = load i8, i8* %y
call void @llvm.memset.p0i8.i32(i8* nonnull %z, i8 0, i32 1, i1 false)
call void @llvm.lifetime.start.p0i8(i64 1, i8* %x)
call void @llvm.lifetime.start.p0i8(i64 1, i8* %y)
call void @llvm.lifetime.start.p0i8(i64 1, i8* %z)
ret void
}
define void @LifeOK() {
; CHECK-LABEL: @LifeOK dso_preemptable{{$}}
; CHECK-NEXT: args uses:
; CHECK-NEXT: allocas uses:
; CHECK: x[1]: [0,1){{$}}
; CHECK: y[1]: [0,1){{$}}
; CHECK: z[1]: [0,1){{$}}
; GLOBAL-NEXT: safe accesses:
; GLOBAL-NEXT: store i8 5, i8* %x
; GLOBAL-NEXT: %n = load i8, i8* %y
; GLOBAL-NEXT: call void @llvm.memset.p0i8.i32(i8* nonnull %z, i8 0, i32 1, i1 false)
; CHECK-EMPTY:
entry:
%x = alloca i8, align 4
%y = alloca i8, align 4
%z = alloca i8, align 4
call void @llvm.lifetime.start.p0i8(i64 1, i8* %x)
call void @llvm.lifetime.start.p0i8(i64 1, i8* %y)
call void @llvm.lifetime.start.p0i8(i64 1, i8* %z)
store i8 5, i8* %x
%n = load i8, i8* %y
call void @llvm.memset.p0i8.i32(i8* nonnull %z, i8 0, i32 1, i1 false)
ret void
}
define void @LifeEnded() {
; CHECK-LABEL: @LifeEnded dso_preemptable{{$}}
; CHECK-NEXT: args uses:
; CHECK-NEXT: allocas uses:
; CHECK: x[1]: full-set{{$}}
; CHECK: y[1]: full-set{{$}}
; CHECK: z[1]: full-set{{$}}
; GLOBAL-NEXT: safe accesses:
; CHECK-EMPTY:
entry:
%x = alloca i8, align 4
%y = alloca i8, align 4
%z = alloca i8, align 4
call void @llvm.lifetime.start.p0i8(i64 1, i8* %x)
call void @llvm.lifetime.start.p0i8(i64 1, i8* %y)
call void @llvm.lifetime.start.p0i8(i64 1, i8* %z)
call void @llvm.lifetime.end.p0i8(i64 1, i8* %x)
call void @llvm.lifetime.end.p0i8(i64 1, i8* %y)
call void @llvm.lifetime.end.p0i8(i64 1, i8* %z)
store i8 5, i8* %x
%n = load i8, i8* %y
call void @llvm.memset.p0i8.i32(i8* nonnull %z, i8 0, i32 1, i1 false)
ret void
}
define void @TwoAllocasOK() {
; CHECK-LABEL: @TwoAllocasOK
; CHECK-NEXT: args uses:
; CHECK-NEXT: allocas uses:
; CHECK: a[4]: [0,1){{$}}
; CHECK: y[1]: [0,1){{$}}
; GLOBAL-NEXT: safe accesses:
; GLOBAL-NEXT: call void @llvm.memcpy.p0i8.p0i8.i32(i8* %y, i8* %x, i32 1, i1 false)
; CHECK-EMPTY:
entry:
%a = alloca i32, align 4
%x = bitcast i32* %a to i8*
%y = alloca i8, align 4
call void @llvm.memcpy.p0i8.p0i8.i32(i8* %y, i8* %x, i32 1, i1 false)
ret void
}
define void @TwoAllocasOOBDest() {
; CHECK-LABEL: @TwoAllocasOOBDest
; CHECK-NEXT: args uses:
; CHECK-NEXT: allocas uses:
; CHECK: a[4]: [0,4){{$}}
; CHECK: y[1]: [0,4){{$}}
; GLOBAL-NEXT: safe accesses:
; CHECK-EMPTY:
entry:
%a = alloca i32, align 4
%x = bitcast i32* %a to i8*
%y = alloca i8, align 4
call void @llvm.memcpy.p0i8.p0i8.i32(i8* %y, i8* %x, i32 4, i1 false)
ret void
}
define void @TwoAllocasOOBSource() {
; CHECK-LABEL: @TwoAllocasOOBSource
; CHECK-NEXT: args uses:
; CHECK-NEXT: allocas uses:
; CHECK: a[4]: [0,4){{$}}
; CHECK: y[1]: [0,4){{$}}
; GLOBAL-NEXT: safe accesses:
; CHECK-EMPTY:
entry:
%a = alloca i32, align 4
%x = bitcast i32* %a to i8*
%y = alloca i8, align 4
call void @llvm.memcpy.p0i8.p0i8.i32(i8* %x, i8* %y, i32 4, i1 false)
ret void
}
define void @TwoAllocasOOBBoth() {
; CHECK-LABEL: @TwoAllocasOOBBoth
; CHECK-NEXT: args uses:
; CHECK-NEXT: allocas uses:
; CHECK: a[4]: [0,5){{$}}
; CHECK: y[1]: [0,5){{$}}
; GLOBAL-NEXT: safe accesses:
; CHECK-EMPTY:
entry:
%a = alloca i32, align 4
%x = bitcast i32* %a to i8*
%y = alloca i8, align 4
call void @llvm.memcpy.p0i8.p0i8.i32(i8* %y, i8* %x, i32 5, i1 false)
ret void
}
define void @MixedAccesses() {
; CHECK-LABEL: @MixedAccesses
; CHECK-NEXT: args uses:
; CHECK-NEXT: allocas uses:
; CHECK: a[4]: [0,5){{$}}
; GLOBAL-NEXT: safe accesses:
; GLOBAL-NEXT: call void @llvm.memset.p0i8.i32(i8* %x, i8 1, i32 4, i1 false)
; CHECK-EMPTY:
entry:
%a = alloca i32, align 4
%x = bitcast i32* %a to i8*
call void @llvm.memset.p0i8.i32(i8* %x, i8 1, i32 5, i1 false)
call void @llvm.memset.p0i8.i32(i8* %x, i8 1, i32 4, i1 false)
ret void
}
define void @MixedAccesses2() {
; CHECK-LABEL: @MixedAccesses2
; CHECK-NEXT: args uses:
; CHECK-NEXT: allocas uses:
; CHECK: a[4]: [0,8){{$}}
; GLOBAL-NEXT: safe accesses:
; GLOBAL-NEXT: load i32, i32* %a, align 4
; CHECK-EMPTY:
entry:
%a = alloca i32, align 4
%a1 = bitcast i32* %a to i64*
%n1 = load i64, i64* %a1, align 4
%n2 = load i32, i32* %a, align 4
ret void
}
define void @MixedAccesses3(void (i8*)* %func) {
; CHECK-LABEL: @MixedAccesses3
; CHECK-NEXT: args uses:
; CHECK-NEXT: func[]: full-set
; CHECK-NEXT: allocas uses:
; CHECK: a[4]: full-set{{$}}
; GLOBAL-NEXT: safe accesses:
; GLOBAL-NEXT: load i32, i32* %a, align 4
; CHECK-EMPTY:
entry:
%a = alloca i32, align 4
%x = bitcast i32* %a to i8*
%n2 = load i32, i32* %a, align 4
call void %func(i8* %x)
ret void
}
define void @MixedAccesses4() {
; CHECK-LABEL: @MixedAccesses4
; CHECK-NEXT: args uses:
; CHECK-NEXT: allocas uses:
; CHECK: a[4]: full-set{{$}}
; CHECK: a1[8]: [0,8){{$}}
; GLOBAL-NEXT: safe accesses:
; GLOBAL-NEXT: load i32, i32* %a, align 4
; CHECK-EMPTY:
entry:
%a = alloca i32, align 4
%a1 = alloca i32*, align 4
%n2 = load i32, i32* %a, align 4
store i32* %a, i32** %a1
ret void
}
define i32* @MixedAccesses5(i1 %x, i32* %y) {
; CHECK-LABEL: @MixedAccesses5
; CHECK-NEXT: args uses:
; CHECK: y[]: full-set
; CHECK-NEXT: allocas uses:
; CHECK: a[4]: full-set{{$}}
; GLOBAL-NEXT: safe accesses:
; GLOBAL-NEXT: load i32, i32* %a, align 4
; CHECK-EMPTY:
entry:
%a = alloca i32, align 4
br i1 %x, label %tlabel, label %flabel
flabel:
%n = load i32, i32* %a, align 4
ret i32* %y
tlabel:
ret i32* %a
}
define void @MixedAccesses6(i8* %arg) {
; CHECK-LABEL: @MixedAccesses6
; CHECK-NEXT: args uses:
; CHECK-NEXT: arg[]: [0,4)
; CHECK-NEXT: allocas uses:
; CHECK: a[4]: [0,4)
; GLOBAL-NEXT: safe accesses:
; GLOBAL-NEXT: call void @llvm.memcpy.p0i8.p0i8.i32(i8* %x, i8* %arg, i32 4, i1 false)
; CHECK-EMPTY:
entry:
%a = alloca i32, align 4
%x = bitcast i32* %a to i8*
call void @llvm.memcpy.p0i8.p0i8.i32(i8* %x, i8* %arg, i32 4, i1 false)
ret void
}
define void @MixedAccesses7(i1 %cond, i8* %arg) {
; SECV doesn't support select, so we consider this non-stack-safe, even through
; it is.
;
; CHECK-LABEL: @MixedAccesses7
; CHECK-NEXT: args uses:
; CHECK-NEXT: arg[]: full-set
; CHECK-NEXT: allocas uses:
; CHECK: a[4]: full-set
; GLOBAL-NEXT: safe accesses:
; CHECK-EMPTY:
entry:
%a = alloca i32, align 4
%x = bitcast i32* %a to i8*
%x1 = select i1 %cond, i8* %arg, i8* %x
call void @llvm.memcpy.p0i8.p0i8.i32(i8* %x1, i8* %arg, i32 4, i1 false)
ret void
}
define void @NoStackAccess(i8* %arg1, i8* %arg2) {
; CHECK-LABEL: @NoStackAccess
; CHECK-NEXT: args uses:
; CHECK-NEXT: arg1[]: [0,4)
; CHECK-NEXT: arg2[]: [0,4)
; CHECK-NEXT: allocas uses:
; CHECK: a[4]: empty-set{{$}}
; GLOBAL-NEXT: safe accesses:
; GLOBAL-NEXT: call void @llvm.memcpy.p0i8.p0i8.i32(i8* %arg1, i8* %arg2, i32 4, i1 false)
; CHECK-EMPTY:
entry:
%a = alloca i32, align 4
%x = bitcast i32* %a to i8*
call void @llvm.memcpy.p0i8.p0i8.i32(i8* %arg1, i8* %arg2, i32 4, i1 false)
ret void
}
define void @DoubleLifetime() {
; CHECK-LABEL: @DoubleLifetime
; CHECK-NEXT: args uses:
; CHECK-NEXT: allocas uses:
; CHECK: a[4]: full-set{{$}}
; GLOBAL-NEXT: safe accesses:
; GLOBAL-NEXT: call void @llvm.memset.p0i8.i32(i8* %x, i8 1, i32 4, i1 false)
; CHECK-EMPTY:
entry:
%a = alloca i32, align 4
%x = bitcast i32* %a to i8*
call void @llvm.lifetime.start.p0i8(i64 4, i8* %x)
call void @llvm.lifetime.end.p0i8(i64 4, i8* %x)
call void @llvm.memset.p0i8.i32(i8* %x, i8 1, i32 4, i1 true)
call void @llvm.lifetime.start.p0i8(i64 4, i8* %x)
call void @llvm.memset.p0i8.i32(i8* %x, i8 1, i32 4, i1 false)
call void @llvm.lifetime.end.p0i8(i64 4, i8* %x)
ret void
}
define void @DoubleLifetime2() {
; CHECK-LABEL: @DoubleLifetime2
; CHECK-NEXT: args uses:
; CHECK-NEXT: allocas uses:
; CHECK: a[4]: full-set{{$}}
; GLOBAL-NEXT: safe accesses:
; GLOBAL-NEXT: call void @llvm.memset.p0i8.i32(i8* %x, i8 1, i32 4, i1 false)
; CHECK-EMPTY:
entry:
%a = alloca i32, align 4
%x = bitcast i32* %a to i8*
call void @llvm.lifetime.start.p0i8(i64 4, i8* %x)
call void @llvm.lifetime.end.p0i8(i64 4, i8* %x)
%n = load i32, i32* %a
call void @llvm.lifetime.start.p0i8(i64 4, i8* %x)
call void @llvm.memset.p0i8.i32(i8* %x, i8 1, i32 4, i1 false)
call void @llvm.lifetime.end.p0i8(i64 4, i8* %x)
ret void
}
define void @DoubleLifetime3() {
; CHECK-LABEL: @DoubleLifetime3
; CHECK-NEXT: args uses:
; CHECK-NEXT: allocas uses:
; CHECK: a[4]: full-set{{$}}
; GLOBAL-NEXT: safe accesses:
; GLOBAL-NEXT: call void @llvm.memset.p0i8.i32(i8* %x, i8 1, i32 4, i1 false)
; CHECK-EMPTY:
entry:
%a = alloca i32, align 4
%x = bitcast i32* %a to i8*
call void @llvm.lifetime.start.p0i8(i64 4, i8* %x)
call void @llvm.lifetime.end.p0i8(i64 4, i8* %x)
store i32 5, i32* %a
call void @llvm.lifetime.start.p0i8(i64 4, i8* %x)
call void @llvm.memset.p0i8.i32(i8* %x, i8 1, i32 4, i1 false)
call void @llvm.lifetime.end.p0i8(i64 4, i8* %x)
ret void
}
define void @DoubleLifetime4() {
; CHECK-LABEL: @DoubleLifetime4
; CHECK-NEXT: args uses:
; CHECK-NEXT: allocas uses:
; CHECK: a[4]: full-set{{$}}
; GLOBAL-NEXT: safe accesses:
; GLOBAL-NEXT: call void @llvm.memset.p0i8.i32(i8* %x, i8 1, i32 4, i1 false)
; CHECK-EMPTY:
entry:
%a = alloca i32, align 4
%x = bitcast i32* %a to i8*
call void @llvm.lifetime.start.p0i8(i64 4, i8* %x)
call void @llvm.memset.p0i8.i32(i8* %x, i8 1, i32 4, i1 false)
call void @llvm.lifetime.end.p0i8(i64 4, i8* %x)
call void @unknown_call(i8* %x)
ret void
}
declare void @llvm.lifetime.start.p0i8(i64, i8* nocapture)
declare void @llvm.lifetime.end.p0i8(i64, i8* nocapture)