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https://github.com/RPCS3/llvm-mirror.git
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55f89e91ff
On x86_86 the lea instruction can only use a 32 bit immediate value. When the code is compiled statically the RIP register is not used, meaning the immediate is all that can be used for the relocation, which is not sufficient in the case of targets more than +/- 2GB away. This patch bails out of fast isel in those cases and reverts to DAG which does the right thing. Test case included. llvm-svn: 211040
187 lines
7.3 KiB
LLVM
187 lines
7.3 KiB
LLVM
; RUN: llc -O0 -mtriple=x86_64-unknown-linux-gnu < %s | FileCheck %s
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; Verify that we have correct debug info for local variables in code
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; instrumented with AddressSanitizer.
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; Generated from the source file test.cc:
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; int bar(int y) {
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; return y + 2;
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; }
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; with "clang++ -S -emit-llvm -fsanitize=address -O0 -g test.cc"
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; First, argument variable "y" resides in %rdi:
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; CHECK: DEBUG_VALUE: bar:y <- RDX
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; Then its address is stored in a location on a stack:
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; CHECK: movq %rdx, [[OFFSET:[0-9]+]](%rsp)
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; CHECK-NEXT: [[START_LABEL:.Ltmp[0-9]+]]
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; CHECK-NEXT: DEBUG_VALUE: bar:y <- [RSP+[[OFFSET]]]
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; This location should be valid until the end of the function.
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; CHECK: .Ldebug_loc{{[0-9]+}}:
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; We expect two location ranges for the variable.
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; First, it is stored in %rdi:
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; CHECK: .Lset{{[0-9]+}} = .Lfunc_begin0-.Lfunc_begin0
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; CHECK-NEXT: .quad .Lset{{[0-9]+}}
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; CHECK-NEXT: .Lset{{[0-9]+}} = [[START_LABEL]]-.Lfunc_begin0
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; CHECK-NEXT: .quad .Lset{{[0-9]+}}
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; CHECK: DW_OP_reg1
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; Then it's addressed via %rsp:
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; CHECK: .Lset{{[0-9]+}} = [[START_LABEL]]-.Lfunc_begin0
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; CHECK-NEXT: .quad .Lset{{[0-9]+}}
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; CHECK-NEXT: .Lset{{[0-9]+}} = .Lfunc_end0-.Lfunc_begin0
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; CHECK-NEXT: .quad .Lset{{[0-9]+}}
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; CHECK: DW_OP_breg7
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; CHECK-NEXT: [[OFFSET]]
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; CHECK: DW_OP_deref
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; ModuleID = 'test.cc'
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target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"
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target triple = "x86_64-unknown-linux-gnu"
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@llvm.global_ctors = appending global [1 x { i32, void ()* }] [{ i32, void ()* } { i32 1, void ()* @asan.module_ctor }]
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@__asan_option_detect_stack_use_after_return = external global i32
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@__asan_gen_ = private unnamed_addr constant [16 x i8] c"1 32 4 6 y.addr\00", align 1
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; Function Attrs: nounwind sanitize_address uwtable
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define i32 @_Z3bari(i32 %y) #0 {
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entry:
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%MyAlloca = alloca [64 x i8], align 32
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%0 = ptrtoint [64 x i8]* %MyAlloca to i64
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%1 = load i32* @__asan_option_detect_stack_use_after_return
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%2 = icmp ne i32 %1, 0
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br i1 %2, label %3, label %5
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; <label>:3 ; preds = %entry
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%4 = call i64 @__asan_stack_malloc_0(i64 64, i64 %0)
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br label %5
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; <label>:5 ; preds = %entry, %3
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%6 = phi i64 [ %0, %entry ], [ %4, %3 ]
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%7 = add i64 %6, 32
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%8 = inttoptr i64 %7 to i32*
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%9 = inttoptr i64 %6 to i64*
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store i64 1102416563, i64* %9
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%10 = add i64 %6, 8
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%11 = inttoptr i64 %10 to i64*
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store i64 ptrtoint ([16 x i8]* @__asan_gen_ to i64), i64* %11
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%12 = add i64 %6, 16
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%13 = inttoptr i64 %12 to i64*
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store i64 ptrtoint (i32 (i32)* @_Z3bari to i64), i64* %13
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%14 = lshr i64 %6, 3
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%15 = add i64 %14, 2147450880
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%16 = add i64 %15, 0
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%17 = inttoptr i64 %16 to i64*
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store i64 -868083100587789839, i64* %17
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%18 = ptrtoint i32* %8 to i64
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%19 = lshr i64 %18, 3
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%20 = add i64 %19, 2147450880
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%21 = inttoptr i64 %20 to i8*
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%22 = load i8* %21
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%23 = icmp ne i8 %22, 0
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call void @llvm.dbg.declare(metadata !{i32* %8}, metadata !12)
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br i1 %23, label %24, label %30
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; <label>:24 ; preds = %5
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%25 = and i64 %18, 7
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%26 = add i64 %25, 3
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%27 = trunc i64 %26 to i8
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%28 = icmp sge i8 %27, %22
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br i1 %28, label %29, label %30
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; <label>:29 ; preds = %24
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call void @__asan_report_store4(i64 %18)
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call void asm sideeffect "", ""()
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unreachable
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; <label>:30 ; preds = %24, %5
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store i32 %y, i32* %8, align 4
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%31 = ptrtoint i32* %8 to i64, !dbg !13
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%32 = lshr i64 %31, 3, !dbg !13
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%33 = add i64 %32, 2147450880, !dbg !13
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%34 = inttoptr i64 %33 to i8*, !dbg !13
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%35 = load i8* %34, !dbg !13
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%36 = icmp ne i8 %35, 0, !dbg !13
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br i1 %36, label %37, label %43, !dbg !13
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; <label>:37 ; preds = %30
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%38 = and i64 %31, 7, !dbg !13
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%39 = add i64 %38, 3, !dbg !13
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%40 = trunc i64 %39 to i8, !dbg !13
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%41 = icmp sge i8 %40, %35, !dbg !13
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br i1 %41, label %42, label %43
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; <label>:42 ; preds = %37
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call void @__asan_report_load4(i64 %31), !dbg !13
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call void asm sideeffect "", ""()
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unreachable
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; <label>:43 ; preds = %37, %30
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%44 = load i32* %8, align 4, !dbg !13
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%add = add nsw i32 %44, 2, !dbg !13
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store i64 1172321806, i64* %9, !dbg !13
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%45 = icmp ne i64 %6, %0, !dbg !13
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br i1 %45, label %46, label %53, !dbg !13
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; <label>:46 ; preds = %43
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%47 = add i64 %15, 0, !dbg !13
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%48 = inttoptr i64 %47 to i64*, !dbg !13
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store i64 -723401728380766731, i64* %48, !dbg !13
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%49 = add i64 %6, 56, !dbg !13
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%50 = inttoptr i64 %49 to i64*, !dbg !13
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%51 = load i64* %50, !dbg !13
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%52 = inttoptr i64 %51 to i8*, !dbg !13
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store i8 0, i8* %52, !dbg !13
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br label %56, !dbg !13
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; <label>:53 ; preds = %43
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%54 = add i64 %15, 0, !dbg !13
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%55 = inttoptr i64 %54 to i64*, !dbg !13
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store i64 0, i64* %55, !dbg !13
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br label %56, !dbg !13
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; <label>:56 ; preds = %53, %46
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ret i32 %add, !dbg !13
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}
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; Function Attrs: nounwind readnone
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declare void @llvm.dbg.declare(metadata, metadata) #1
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define internal void @asan.module_ctor() {
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call void @__asan_init_v3()
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ret void
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}
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declare void @__asan_init_v3()
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declare void @__asan_report_load4(i64)
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declare void @__asan_report_store4(i64)
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declare i64 @__asan_stack_malloc_0(i64, i64)
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attributes #0 = { nounwind sanitize_address uwtable "less-precise-fpmad"="false" "no-frame-pointer-elim"="true" "no-frame-pointer-elim-non-leaf" "no-infs-fp-math"="false" "no-nans-fp-math"="false" "stack-protector-buffer-size"="8" "unsafe-fp-math"="false" "use-soft-float"="false" }
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attributes #1 = { nounwind readnone }
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!llvm.dbg.cu = !{!0}
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!llvm.module.flags = !{!9, !10}
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!llvm.ident = !{!11}
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!0 = metadata !{i32 786449, metadata !1, i32 4, metadata !"clang version 3.5.0 (209308)", i1 false, metadata !"", i32 0, metadata !2, metadata !2, metadata !3, metadata !2, metadata !2, metadata !"", i32 1} ; [ DW_TAG_compile_unit ] [/llvm_cmake_gcc/test.cc] [DW_LANG_C_plus_plus]
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!1 = metadata !{metadata !"test.cc", metadata !"/llvm_cmake_gcc"}
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!2 = metadata !{}
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!3 = metadata !{metadata !4}
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!4 = metadata !{i32 786478, metadata !1, metadata !5, metadata !"bar", metadata !"bar", metadata !"_Z3bari", i32 1, metadata !6, i1 false, i1 true, i32 0, i32 0, null, i32 256, i1 false, i32 (i32)* @_Z3bari, null, null, metadata !2, i32 1} ; [ DW_TAG_subprogram ] [line 1] [def] [bar]
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!5 = metadata !{i32 786473, metadata !1} ; [ DW_TAG_file_type ] [/llvm_cmake_gcc/test.cc]
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!6 = metadata !{i32 786453, i32 0, null, metadata !"", i32 0, i64 0, i64 0, i64 0, i32 0, null, metadata !7, i32 0, null, null, null} ; [ DW_TAG_subroutine_type ] [line 0, size 0, align 0, offset 0] [from ]
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!7 = metadata !{metadata !8, metadata !8}
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!8 = metadata !{i32 786468, null, null, metadata !"int", i32 0, i64 32, i64 32, i64 0, i32 0, i32 5} ; [ DW_TAG_base_type ] [int] [line 0, size 32, align 32, offset 0, enc DW_ATE_signed]
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!9 = metadata !{i32 2, metadata !"Dwarf Version", i32 4}
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!10 = metadata !{i32 2, metadata !"Debug Info Version", i32 1}
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!11 = metadata !{metadata !"clang version 3.5.0 (209308)"}
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!12 = metadata !{i32 786689, metadata !4, metadata !"y", metadata !5, i32 16777217, metadata !8, i32 0, i32 0, i64 2} ; [ DW_TAG_arg_variable ] [y] [line 1]
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!13 = metadata !{i32 2, i32 0, metadata !4, null}
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