[dwarfdump] Pretty print location expressions and location lists
Summary:
Based on Fred's patch here: https://reviews.llvm.org/D6771
I can't seem to commandeer the old review, so I'm creating a new one.
With that change the locations exrpessions are pretty printed inline in the
DIE tree. The output looks like this for debug_loc entries:
DW_AT_location [DW_FORM_data4] (0x00000000
0x0000000000000001 - 0x000000000000000b: DW_OP_consts +3
0x000000000000000b - 0x0000000000000012: DW_OP_consts +7
0x0000000000000012 - 0x000000000000001b: DW_OP_reg0 RAX, DW_OP_piece 0x4
0x000000000000001b - 0x0000000000000024: DW_OP_breg5 RDI+0)
And like this for debug_loc.dwo entries:
DW_AT_location [DW_FORM_sec_offset] (0x00000000
Addr idx 2 (w/ length 190): DW_OP_consts +0, DW_OP_stack_value
Addr idx 3 (w/ length 23): DW_OP_reg0 RAX, DW_OP_piece 0x4)
Simple locations without ranges are printed inline:
DW_AT_location [DW_FORM_block1] (DW_OP_reg4 RSI, DW_OP_piece 0x4, DW_OP_bit_piece 0x20 0x0)
The debug_loc(.dwo) dumping in changed accordingly to factor the code.
Reviewers: dblaikie, aprantl, friss
Subscribers: mgorny, javed.absar, hiraditya, llvm-commits, JDevlieghere
Differential Revision: https://reviews.llvm.org/D37123
llvm-svn: 312042
diff --git a/llvm/test/CodeGen/X86/dbg-baseptr.ll b/llvm/test/CodeGen/X86/dbg-baseptr.ll
index 893ca93..5dd1056 100644
--- a/llvm/test/CodeGen/X86/dbg-baseptr.ll
+++ b/llvm/test/CodeGen/X86/dbg-baseptr.ll
@@ -22,12 +22,10 @@
; DWARF-LABEL: .debug_info contents:
; DWARF-LABEL: DW_TAG_subprogram
-; DWARF: DW_AT_frame_base [DW_FORM_exprloc] (<0x1> 57 )
-; 0x57 -> RSP
+; DWARF: DW_AT_frame_base [DW_FORM_exprloc] (DW_OP_reg7 RSP)
; DWARF: DW_AT_name [DW_FORM_strp] ( {{.*}}"f0")
; DWARF: DW_TAG_formal_parameter
-; DWARF-NEXT: DW_AT_location [DW_FORM_exprloc] (<0x2> 91 08 )
-; DW_OP_fbreg (0x91) 0x08
+; DWARF-NEXT: DW_AT_location [DW_FORM_exprloc] (DW_OP_fbreg +8)
; DWARF-NEXT: DW_AT_name [DW_FORM_strp] ( {{.*}}"input")
@@ -48,12 +46,10 @@
}
; DWARF-LABEL: DW_TAG_subprogram
-; DWARF: DW_AT_frame_base [DW_FORM_exprloc] (<0x1> 56 )
-; 0x56 -> RBP
+; DWARF: DW_AT_frame_base [DW_FORM_exprloc] (DW_OP_reg6 RBP)
; DWARF: DW_AT_name [DW_FORM_strp] ( {{.*}}"f1")
; DWARF: DW_TAG_formal_parameter
-; DWARF-NEXT: DW_AT_location [DW_FORM_exprloc] (<0x2> 91 10 )
-; DW_OP_fbreg (0x91) 0x10
+; DWARF-NEXT: DW_AT_location [DW_FORM_exprloc] (DW_OP_fbreg +16)
; DWARF-NEXT: DW_AT_name [DW_FORM_strp] ( {{.*}}"input")
; CHECK-LABEL: f2:
@@ -75,12 +71,10 @@
; "input" should still be referred to through RBP.
; DWARF-LABEL: DW_TAG_subprogram
-; DWARF: DW_AT_frame_base [DW_FORM_exprloc] (<0x1> 56 )
-; 0x56 -> RBP
+; DWARF: DW_AT_frame_base [DW_FORM_exprloc] (DW_OP_reg6 RBP)
; DWARF: DW_AT_name [DW_FORM_strp] ( {{.*}}"f2")
; DWARF: DW_TAG_formal_parameter
-; DWARF-NEXT: DW_AT_location [DW_FORM_exprloc] (<0x2> 91 10 )
-; DW_OP_fbreg (0x91) 0x10
+; DWARF-NEXT: DW_AT_location [DW_FORM_exprloc] (DW_OP_fbreg +16)
; DWARF-NEXT: DW_AT_name [DW_FORM_strp] ( {{.*}}"input")
declare void @llvm.dbg.declare(metadata, metadata, metadata)