[llvm] 288c9e8 - [GlobalISel] Remove debug locations when emitting G_FCONSTANT.

[Davide Italiano via llvm-commits]

Author: Davide Italiano
Date: 2020-05-11T16:25:03-07:00
New Revision: 288c9e81781e5468cf6db5c4f6e579f39cfe72ba

URL: https://github.com/llvm/llvm-project/commit/288c9e81781e5468cf6db5c4f6e579f39cfe72ba
DIFF: https://github.com/llvm/llvm-project/commit/288c9e81781e5468cf6db5c4f6e579f39cfe72ba.diff

LOG: [GlobalISel] Remove debug locations when emitting G_FCONSTANT.

<rdar://problem/62991543>

Added: 
    llvm/test/CodeGen/AArch64/GlobalISel/fconstant-dbg-loc.ll

Modified: 
    llvm/lib/CodeGen/GlobalISel/MachineIRBuilder.cpp

Removed: 
    


################################################################################
diff  --git a/llvm/lib/CodeGen/GlobalISel/MachineIRBuilder.cpp b/llvm/lib/CodeGen/GlobalISel/MachineIRBuilder.cpp
index 2ae2cba745ef..7af8332bbce3 100644
--- a/llvm/lib/CodeGen/GlobalISel/MachineIRBuilder.cpp
+++ b/llvm/lib/CodeGen/GlobalISel/MachineIRBuilder.cpp
@@ -324,6 +324,7 @@ MachineInstrBuilder MachineIRBuilder::buildFConstant(const DstOp &Res,
   }
 
   auto Const = buildInstr(TargetOpcode::G_FCONSTANT);
+  Const->setDebugLoc(DebugLoc());
   Res.addDefToMIB(*getMRI(), Const);
   Const.addFPImm(&Val);
   return Const;

diff  --git a/llvm/test/CodeGen/AArch64/GlobalISel/fconstant-dbg-loc.ll b/llvm/test/CodeGen/AArch64/GlobalISel/fconstant-dbg-loc.ll
new file mode 100644
index 000000000000..c1c918ff64a6
--- /dev/null
+++ b/llvm/test/CodeGen/AArch64/GlobalISel/fconstant-dbg-loc.ll
@@ -0,0 +1,25 @@
+; Make sure we don't assign debug locations to G_FCONSTANT(s) when lowering.
+
+; RUN: llc -mtriple aarch64 -O0 -stop-after=irtranslator -global-isel -verify-machineinstrs %s -o - 2>&1 | FileCheck --match-full-lines %s
+target datalayout = "e-m:o-i64:64-i128:128-n32:64-S128"
+target triple = "arm64-apple-ios5.0.0"
+
+define float @main() #0 !dbg !14 {
+; CHECK: %0:_(s32) = G_FCONSTANT float 0.000000e+00
+  ret float 0.000000e+00, !dbg !24
+}
+
+!llvm.dbg.cu = !{!2}
+!llvm.module.flags = !{!9, !10, !11, !12}
+!llvm.ident = !{!13}
+
+!2 = distinct !DICompileUnit(language: DW_LANG_C99, file: !3, isOptimized: false, runtimeVersion: 0, emissionKind: FullDebug, enums: !4, nameTableKind: GNU)
+!3 = !DIFile(filename: "dbg.c", directory: "/")
+!4 = !{}
+!9 = !{i32 2, !"Dwarf Version", i32 2}
+!10 = !{i32 2, !"Debug Info Version", i32 3}
+!11 = !{i32 1, !"wchar_size", i32 4}
+!12 = !{i32 7, !"PIC Level", i32 2}
+!13 = !{!"clang"}
+!14 = distinct !DISubprogram(name: "main", scope: !3, file: !3, line: 3, scopeLine: 3, spFlags: DISPFlagDefinition, unit: !2, retainedNodes: !4)
+!24 = !DILocation(line: 7, column: 3, scope: !14)