2014-04-01 23:19:23 +00:00
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; RUN: llc -O1 -filetype=obj -mtriple=x86_64-apple-darwin < %s > %t
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; RUN: llvm-dwarfdump %t | FileCheck %s
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2014-04-03 23:20:02 +00:00
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; RUN: llvm-objdump -r %t | FileCheck -check-prefix=DARWIN %s
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2014-04-01 23:19:23 +00:00
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; RUN: llc -O1 -filetype=obj -mtriple=x86_64-pc-linux-gnu < %s > %t
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; RUN: llvm-dwarfdump %t | FileCheck %s
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; RUN: llvm-objdump -r %t | FileCheck -check-prefix=LINUX %s
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2012-06-22 01:25:12 +00:00
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; PR9493
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; Adapted from the original test case in r127757.
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; We use 'llc -O1' to induce variable 'x' to live in different locations.
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; We don't actually care where 'x' lives, or what exact optimizations get
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; used, as long as 'x' moves around we're fine.
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; // The variable 'x' lives in different locations, so it needs an entry in
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; // the .debug_loc table section, referenced by DW_AT_location.
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; // This ref is not relocatable on Darwin, and is relocatable elsewhere.
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; extern int g(int, int);
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; extern int a;
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;
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; void f(void) {
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; int x;
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; a = g(0, 0);
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; x = 1;
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; while (x & 1) { x *= a; }
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; a = g(x, 0);
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; x = 2;
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; while (x & 2) { x *= a; }
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; a = g(0, x);
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; }
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; // The 'x' variable and its symbol reference location
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2014-04-01 23:19:23 +00:00
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; CHECK: .debug_info contents:
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; CHECK: DW_TAG_variable
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2014-06-13 22:18:23 +00:00
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; CHECK-NEXT: DW_AT_location [DW_FORM_sec_offset] (0x00000000)
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2014-04-01 23:19:23 +00:00
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; CHECK-NEXT: DW_AT_name {{.*}} "x"
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; CHECK-NEXT: DW_AT_decl_file
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; CHECK-NEXT: DW_AT_decl_line
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; CHECK-NEXT: DW_AT_type
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; Check that the location contains only 4 ranges - this verifies that the 4th
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; and 5th ranges were successfully merged into a single range.
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; CHECK: .debug_loc contents:
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; CHECK: 0x00000000:
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; CHECK: Beginning address offset:
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; CHECK: Beginning address offset:
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; CHECK: Beginning address offset:
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; CHECK: Beginning address offset:
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; CHECK-NOT: Beginning address offset:
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; Check that we have no relocations in Darwin's output.
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; DARWIN-NOT: X86_64_RELOC{{.*}} __debug_loc
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2012-06-22 01:25:12 +00:00
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2014-04-01 23:19:23 +00:00
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; Check we have a relocation for the debug_loc entry in Linux output.
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; LINUX: RELOCATION RECORDS FOR [.rela.debug_info]
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; LINUX-NOT: RELOCATION RECORDS
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; LINUX: R_X86_64{{.*}} .debug_loc+0
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2012-06-22 01:25:12 +00:00
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; ModuleID = 'simple.c'
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target datalayout = "e-p:32:32:32-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-v64:64:64-v128:128:128-a0:0:64-n32"
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@a = external global i32
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define void @f() nounwind {
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entry:
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%call = tail call i32 @g(i32 0, i32 0) nounwind, !dbg !8
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2013-04-30 17:52:57 +00:00
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store i32 %call, i32* @a, align 4, !dbg !8
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2014-10-03 20:01:09 +00:00
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tail call void @llvm.dbg.value(metadata !12, i64 0, metadata !5, metadata !{metadata !"0x102"}), !dbg !13
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2012-06-22 01:25:12 +00:00
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br label %while.body
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while.body: ; preds = %entry, %while.body
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%x.017 = phi i32 [ 1, %entry ], [ %mul, %while.body ]
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%mul = mul nsw i32 %call, %x.017, !dbg !14
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%and = and i32 %mul, 1, !dbg !14
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%tobool = icmp eq i32 %and, 0, !dbg !14
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br i1 %tobool, label %while.end, label %while.body, !dbg !14
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while.end: ; preds = %while.body
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2014-10-03 20:01:09 +00:00
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tail call void @llvm.dbg.value(metadata !{i32 %mul}, i64 0, metadata !5, metadata !{metadata !"0x102"}), !dbg !14
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2012-06-22 01:25:12 +00:00
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%call4 = tail call i32 @g(i32 %mul, i32 0) nounwind, !dbg !15
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2013-04-30 17:52:57 +00:00
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store i32 %call4, i32* @a, align 4, !dbg !15
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2014-10-03 20:01:09 +00:00
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tail call void @llvm.dbg.value(metadata !16, i64 0, metadata !5, metadata !{metadata !"0x102"}), !dbg !17
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2012-06-22 01:25:12 +00:00
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br label %while.body9
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while.body9: ; preds = %while.end, %while.body9
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%x.116 = phi i32 [ 2, %while.end ], [ %mul12, %while.body9 ]
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%mul12 = mul nsw i32 %call4, %x.116, !dbg !18
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%and7 = and i32 %mul12, 2, !dbg !18
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%tobool8 = icmp eq i32 %and7, 0, !dbg !18
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br i1 %tobool8, label %while.end13, label %while.body9, !dbg !18
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while.end13: ; preds = %while.body9
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2014-10-03 20:01:09 +00:00
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tail call void @llvm.dbg.value(metadata !{i32 %mul12}, i64 0, metadata !5, metadata !{metadata !"0x102"}), !dbg !18
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2012-06-22 01:25:12 +00:00
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%call15 = tail call i32 @g(i32 0, i32 %mul12) nounwind, !dbg !19
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2013-04-30 17:52:57 +00:00
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store i32 %call15, i32* @a, align 4, !dbg !19
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2012-06-22 01:25:12 +00:00
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ret void, !dbg !20
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}
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declare i32 @g(i32, i32)
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Move the complex address expression out of DIVariable and into an extra
argument of the llvm.dbg.declare/llvm.dbg.value intrinsics.
Previously, DIVariable was a variable-length field that has an optional
reference to a Metadata array consisting of a variable number of
complex address expressions. In the case of OpPiece expressions this is
wasting a lot of storage in IR, because when an aggregate type is, e.g.,
SROA'd into all of its n individual members, the IR will contain n copies
of the DIVariable, all alike, only differing in the complex address
reference at the end.
By making the complex address into an extra argument of the
dbg.value/dbg.declare intrinsics, all of the pieces can reference the
same variable and the complex address expressions can be uniqued across
the CU, too.
Down the road, this will allow us to move other flags, such as
"indirection" out of the DIVariable, too.
The new intrinsics look like this:
declare void @llvm.dbg.declare(metadata %storage, metadata %var, metadata %expr)
declare void @llvm.dbg.value(metadata %storage, i64 %offset, metadata %var, metadata %expr)
This patch adds a new LLVM-local tag to DIExpressions, so we can detect
and pretty-print DIExpression metadata nodes.
What this patch doesn't do:
This patch does not touch the "Indirect" field in DIVariable; but moving
that into the expression would be a natural next step.
http://reviews.llvm.org/D4919
rdar://problem/17994491
Thanks to dblaikie and dexonsmith for reviewing this patch!
Note: I accidentally committed a bogus older version of this patch previously.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@218787 91177308-0d34-0410-b5e6-96231b3b80d8
2014-10-01 18:55:02 +00:00
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declare void @llvm.dbg.value(metadata, i64, metadata, metadata) nounwind readnone
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2012-06-22 01:25:12 +00:00
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2013-03-08 00:23:31 +00:00
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!llvm.dbg.cu = !{!2}
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2013-11-22 21:49:45 +00:00
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!llvm.module.flags = !{!24}
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2012-06-22 01:25:12 +00:00
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2014-10-03 20:01:09 +00:00
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!0 = metadata !{metadata !"0x2e\00f\00f\00\004\000\001\000\006\00256\001\004", metadata !23, metadata !1, metadata !3, null, void ()* @f, null, null, metadata !22} ; [ DW_TAG_subprogram ] [line 4] [def] [f]
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!1 = metadata !{metadata !"0x29", metadata !23} ; [ DW_TAG_file_type ]
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!2 = metadata !{metadata !"0x11\0012\00clang version 3.0 (trunk)\001\00\000\00\001", metadata !23, metadata !4, metadata !4, metadata !21, null, null} ; [ DW_TAG_compile_unit ]
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!3 = metadata !{metadata !"0x15\00\000\000\000\000\000\000", metadata !23, metadata !1, null, metadata !4, null, null, null} ; [ DW_TAG_subroutine_type ] [line 0, size 0, align 0, offset 0] [from ]
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2012-06-22 01:25:12 +00:00
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!4 = metadata !{null}
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2014-10-03 20:01:09 +00:00
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!5 = metadata !{metadata !"0x100\00x\005\000", metadata !6, metadata !1, metadata !7} ; [ DW_TAG_auto_variable ]
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!6 = metadata !{metadata !"0xb\004\0014\000", metadata !23, metadata !0} ; [ DW_TAG_lexical_block ]
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!7 = metadata !{metadata !"0x24\00int\000\0032\0032\000\000\005", null, metadata !2} ; [ DW_TAG_base_type ]
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2012-06-22 01:25:12 +00:00
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!8 = metadata !{i32 6, i32 3, metadata !6, null}
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!12 = metadata !{i32 1}
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!13 = metadata !{i32 7, i32 3, metadata !6, null}
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!14 = metadata !{i32 8, i32 3, metadata !6, null}
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!15 = metadata !{i32 9, i32 3, metadata !6, null}
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!16 = metadata !{i32 2}
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!17 = metadata !{i32 10, i32 3, metadata !6, null}
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!18 = metadata !{i32 11, i32 3, metadata !6, null}
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!19 = metadata !{i32 12, i32 3, metadata !6, null}
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!20 = metadata !{i32 13, i32 1, metadata !6, null}
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2013-03-17 21:13:55 +00:00
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!21 = metadata !{metadata !0}
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!22 = metadata !{metadata !5}
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!23 = metadata !{metadata !"simple.c", metadata !"/home/rengol01/temp/tests/dwarf/relocation"}
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2014-10-03 20:01:09 +00:00
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!24 = metadata !{i32 1, metadata !"Debug Info Version", i32 2}
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