diff --git a/.gitignore b/.gitignore
index b53b06b03cac6..a0b491f42789a 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,3 +1,7 @@
+# This file should only ignore things that are generated during a build,
+# generated by common IDEs, and optional files controlled by the user
+# that affect the build (such as config.toml).
+# FIXME: This needs cleanup.
 *~
 .#*
 .DS_Store
@@ -14,20 +18,16 @@ __pycache__/
 .valgrindrc
 .vscode
 .favorites.json
-/*-*-*-*/
-/*-*-*/
 /Makefile
-/build
+/build/
 /config.toml
 /dist/
 /dl/
-/doc
+/doc/
 /inst/
 /llvm/
 /mingw-build/
-/nd/
 /obj/
-/rt/
 /rustllvm/
 /src/libcore/unicode/DerivedCoreProperties.txt
 /src/libcore/unicode/DerivedNormalizationProps.txt
@@ -37,11 +37,7 @@ __pycache__/
 /src/libcore/unicode/SpecialCasing.txt
 /src/libcore/unicode/UnicodeData.txt
 /src/libcore/unicode/downloaded
-/stage[0-9]+/
-/target
-target/
-/test/
-/tmp/
+/target/
 tags
 tags.*
 TAGS
@@ -50,17 +46,6 @@ TAGS.*
 \#*\#
 config.mk
 config.stamp
-keywords.md
-lexer.ml
 Session.vim
-src/etc/dl
-tmp.*.rs
-version.md
-version.ml
-version.texi
 .cargo
-!src/vendor/**
-/src/target/
-
 no_llvm_build
-
diff --git a/src/.gitignore b/src/.gitignore
deleted file mode 100644
index f1b36f5858037..0000000000000
--- a/src/.gitignore
+++ /dev/null
@@ -1,46 +0,0 @@
-*.a
-*.aux
-*.bc
-*.boot
-*.bz2
-*.cmi
-*.cmo
-*.cmx
-*.cp
-*.cps
-*.d
-*.dSYM
-*.def
-*.diff
-*.dll
-*.dylib
-*.elc
-*.epub
-*.exe
-*.fn
-*.html
-*.kdev4
-*.ky
-*.ll
-*.llvm
-*.log
-*.o
-*.orig
-*.out
-*.patch
-*.pdb
-*.pdf
-*.pg
-*.pot
-*.pyc
-*.rej
-*.rlib
-*.rustc
-*.so
-*.swo
-*.swp
-*.tmp
-*.toc
-*.tp
-*.vr
-*.x86