e39f6c1844
There are many tests that specify a target triple/CPU flags but no DataLayout which can lead to IR being generated that has unusual behaviour. This commit attempts to use the default DataLayout based on the relevant flags if there is no explicit override on the command line or in the IR file. One thing that is not currently possible to differentiate from a missing datalayout `target datalayout = ""` in the IR file since the current APIs don't allow detecting this case. If it is considered useful to support this case (instead of passing "-data-layout=" on the command line), I can change IR parsers to track whether they have seen such a directive and change the callback type. Differential Revision: https://reviews.llvm.org/D141060
69 lines
3.4 KiB
LLVM
69 lines
3.4 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --version 3
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; RUN: opt -safe-stack -S -mtriple=i386-pc-linux-gnu < %s -o - | FileCheck %s --check-prefix=I386
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; RUN: opt -safe-stack -S -mtriple=x86_64-pc-linux-gnu < %s -o - | FileCheck %s --check-prefix=X86-64
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%struct.__jmp_buf_tag = type { [8 x i64], i32, %struct.__sigset_t }
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%struct.__sigset_t = type { [16 x i64] }
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@.str = private unnamed_addr constant [4 x i8] c"%s\0A\00", align 1
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@buf = internal global [1 x %struct.__jmp_buf_tag] zeroinitializer, align 16
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; setjmp/longjmp test with dynamically sized array.
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; Requires protector.
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define i32 @foo(i32 %size) nounwind uwtable safestack {
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; I386-LABEL: define i32 @foo(
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; I386-SAME: i32 [[SIZE:%.*]]) #[[ATTR0:[0-9]+]] {
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; I386-NEXT: entry:
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; I386-NEXT: [[UNSAFE_STACK_PTR:%.*]] = load ptr, ptr @__safestack_unsafe_stack_ptr, align 4
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; I386-NEXT: [[UNSAFE_STACK_DYNAMIC_PTR:%.*]] = alloca ptr, align 4
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; I386-NEXT: store ptr [[UNSAFE_STACK_PTR]], ptr [[UNSAFE_STACK_DYNAMIC_PTR]], align 4
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; I386-NEXT: [[TMP0:%.*]] = mul i32 [[SIZE]], 4
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; I386-NEXT: [[TMP1:%.*]] = load ptr, ptr @__safestack_unsafe_stack_ptr, align 4
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; I386-NEXT: [[TMP2:%.*]] = ptrtoint ptr [[TMP1]] to i32
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; I386-NEXT: [[TMP3:%.*]] = sub i32 [[TMP2]], [[TMP0]]
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; I386-NEXT: [[TMP4:%.*]] = and i32 [[TMP3]], -16
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; I386-NEXT: [[A:%.*]] = inttoptr i32 [[TMP4]] to ptr
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; I386-NEXT: store ptr [[A]], ptr @__safestack_unsafe_stack_ptr, align 4
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; I386-NEXT: store ptr [[A]], ptr [[UNSAFE_STACK_DYNAMIC_PTR]], align 4
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; I386-NEXT: [[CALL:%.*]] = call i32 @_setjmp(ptr @buf) #[[ATTR1:[0-9]+]]
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; I386-NEXT: [[TMP5:%.*]] = load ptr, ptr [[UNSAFE_STACK_DYNAMIC_PTR]], align 4
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; I386-NEXT: store ptr [[TMP5]], ptr @__safestack_unsafe_stack_ptr, align 4
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; I386-NEXT: call void @funcall(ptr [[A]])
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; I386-NEXT: store ptr [[UNSAFE_STACK_PTR]], ptr @__safestack_unsafe_stack_ptr, align 4
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; I386-NEXT: ret i32 0
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;
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; X86-64-LABEL: define i32 @foo(
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; X86-64-SAME: i32 [[SIZE:%.*]]) #[[ATTR0:[0-9]+]] {
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; X86-64-NEXT: entry:
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; X86-64-NEXT: [[UNSAFE_STACK_PTR:%.*]] = load ptr, ptr @__safestack_unsafe_stack_ptr, align 8
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; X86-64-NEXT: [[UNSAFE_STACK_DYNAMIC_PTR:%.*]] = alloca ptr, align 8
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; X86-64-NEXT: store ptr [[UNSAFE_STACK_PTR]], ptr [[UNSAFE_STACK_DYNAMIC_PTR]], align 8
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; X86-64-NEXT: [[TMP0:%.*]] = zext i32 [[SIZE]] to i64
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; X86-64-NEXT: [[TMP1:%.*]] = mul i64 [[TMP0]], 4
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; X86-64-NEXT: [[TMP2:%.*]] = load ptr, ptr @__safestack_unsafe_stack_ptr, align 8
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; X86-64-NEXT: [[TMP3:%.*]] = ptrtoint ptr [[TMP2]] to i64
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; X86-64-NEXT: [[TMP4:%.*]] = sub i64 [[TMP3]], [[TMP1]]
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; X86-64-NEXT: [[TMP5:%.*]] = and i64 [[TMP4]], -16
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; X86-64-NEXT: [[A:%.*]] = inttoptr i64 [[TMP5]] to ptr
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; X86-64-NEXT: store ptr [[A]], ptr @__safestack_unsafe_stack_ptr, align 8
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; X86-64-NEXT: store ptr [[A]], ptr [[UNSAFE_STACK_DYNAMIC_PTR]], align 8
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; X86-64-NEXT: [[CALL:%.*]] = call i32 @_setjmp(ptr @buf) #[[ATTR1:[0-9]+]]
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; X86-64-NEXT: [[TMP6:%.*]] = load ptr, ptr [[UNSAFE_STACK_DYNAMIC_PTR]], align 8
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; X86-64-NEXT: store ptr [[TMP6]], ptr @__safestack_unsafe_stack_ptr, align 8
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; X86-64-NEXT: call void @funcall(ptr [[A]])
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; X86-64-NEXT: store ptr [[UNSAFE_STACK_PTR]], ptr @__safestack_unsafe_stack_ptr, align 8
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; X86-64-NEXT: ret i32 0
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;
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entry:
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%a = alloca i32, i32 %size
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%call = call i32 @_setjmp(ptr @buf) returns_twice
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call void @funcall(ptr %a)
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ret i32 0
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}
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declare i32 @_setjmp(ptr)
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declare void @funcall(ptr)
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