From a37e165e436c421db61bdfb4e93b20ad7282f9dd Mon Sep 17 00:00:00 2001 From: Adrian Prantl Date: Tue, 10 Oct 2017 18:08:32 +0000 Subject: [PATCH] Debug Info: Fix the SDLoc propagation for a DAGCombiner rule This patch ensures that the rule: fold (zext (load x)) -> (zext (truncate (zextload x))) propagates the SDLoc of the load to the zextload. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@315340 91177308-0d34-0410-b5e6-96231b3b80d8 --- test/CodeGen/X86/load-combine-dbg.ll | 37 ++++++++++++++++++++++++++++ 1 file changed, 37 insertions(+) create mode 100644 test/CodeGen/X86/load-combine-dbg.ll diff --git a/test/CodeGen/X86/load-combine-dbg.ll b/test/CodeGen/X86/load-combine-dbg.ll new file mode 100644 index 00000000000..59e6e1ac39f --- /dev/null +++ b/test/CodeGen/X86/load-combine-dbg.ll @@ -0,0 +1,37 @@ +; RUN: llc -O0 < %s -mtriple=x86_64-unknown | FileCheck %s +; This was extracted from a swift debugger stepping testcase and checks that the +; fold (zext (load x)) -> (zext (truncate (zextload x))) +; rule propagates the SDLoc of the load to the zextload. + +; CHECK: .loc {{.*}} main.swift:100 +; CHECK-NOT: .loc +; CHECK: .loc {{.*}} main.swift:200 +; CHECK-NOT: .loc +; CHECK: .loc {{.*}} main.swift:300 +; CHECK-NOT: .loc +declare void @foo(double) + +define i32 @zext_load(i32* %arg) !dbg !30 { + %1 = bitcast i32* %arg to i8* + %2 = getelementptr inbounds i8, i8* %1, i32 1 + %3 = load i8, i8* %2, align 1, !dbg !100 + %4 = uitofp i8 %3 to double, !dbg !200 + call void @foo(double %4), !dbg !200 + %5 = zext i8 %3 to i32, !dbg !300 + ret i32 %5 +} +!llvm.dbg.cu = !{!1} +!llvm.module.flags = !{!0} + +!0 = !{i32 2, !"Debug Info Version", i32 3} +!1 = distinct !DICompileUnit(language: DW_LANG_Swift, file: !3, isOptimized: false, emissionKind: FullDebug) +!2 = !DIModule(scope: null, name: "test", includePath: "", isysroot: "/") +!3 = !DIFile(filename: "main.swift", directory: "/") + +!30 = distinct !DISubprogram(name: "main", scope: !2, file: !3, line: 1, type: !31, isLocal: false, isDefinition: true, isOptimized: false, unit: !1) +!31 = !DISubroutineType(types: !32) +!32 = !{} + +!100 = !DILocation(line: 100, scope: !30) +!200 = !DILocation(line: 200, scope: !30) +!300 = !DILocation(line: 300, scope: !30) -- 2.40.0