restore debug llvm CI coverage

and reduce redundant coverage in slow runs to save time

ci/x86_64-linux-debug-llvm.sh

@@ -0,0 +1,70 @@
+#!/bin/sh
+
+# Requires cmake ninja-build
+
+set -x
+set -e
+
+ARCH="$(uname -m)"
+TARGET="$ARCH-linux-musl"
+MCPU="baseline"
+CACHE_BASENAME="zig+llvm+lld+clang-$TARGET-0.15.0-dev.233+7c85dc460"
+PREFIX="$HOME/deps/$CACHE_BASENAME"
+ZIG="$PREFIX/bin/zig"
+
+export PATH="$HOME/deps/wasmtime-v29.0.0-$ARCH-linux:$HOME/deps/qemu-linux-x86_64-9.2.0-rc1/bin:$HOME/local/bin:$PATH"
+
+# Make the `zig version` number consistent.
+# This will affect the cmake command below.
+git fetch --unshallow || true
+git fetch --tags
+
+# Override the cache directories because they won't actually help other CI runs
+# which will be testing alternate versions of zig, and ultimately would just
+# fill up space on the hard drive for no reason.
+export ZIG_GLOBAL_CACHE_DIR="$PWD/zig-global-cache"
+export ZIG_LOCAL_CACHE_DIR="$PWD/zig-local-cache"
+
+mkdir build-debug-llvm
+cd build-debug-llvm
+
+export CC="$ZIG cc -target $TARGET -mcpu=$MCPU"
+export CXX="$ZIG c++ -target $TARGET -mcpu=$MCPU"
+
+cmake .. \
+  -DCMAKE_INSTALL_PREFIX="stage3-debug" \
+  -DCMAKE_PREFIX_PATH="$PREFIX" \
+  -DCMAKE_BUILD_TYPE=Debug \
+  -DZIG_TARGET_TRIPLE="$TARGET" \
+  -DZIG_TARGET_MCPU="$MCPU" \
+  -DZIG_STATIC=ON \
+  -DZIG_NO_LIB=ON \
+  -DZIG_EXTRA_BUILD_ARGS="-Duse-llvm=true" \
+  -GNinja
+
+# Now cmake will use zig as the C/C++ compiler. We reset the environment variables
+# so that installation and testing do not get affected by them.
+unset CC
+unset CXX
+
+ninja install
+
+# simultaneously test building self-hosted without LLVM and with 32-bit arm
+stage3-debug/bin/zig build \
+  -Dtarget=arm-linux-musleabihf \
+  -Dno-lib
+
+stage3-debug/bin/zig build test docs \
+  --maxrss 21000000000 \
+  -Dlldb=$HOME/deps/lldb-zig/Debug-e0a42bb34/bin/lldb \
+  -fqemu \
+  -fwasmtime \
+  -Dstatic-llvm \
+  -Dskip-freebsd \
+  -Dskip-netbsd \
+  -Dskip-windows \
+  -Dskip-macos \
+  -Dtarget=native-native-musl \
+  --search-prefix "$PREFIX" \
+  --zig-lib-dir "$PWD/../lib" \
+  -Denable-superhtml

ci/x86_64-linux-debug.sh

@@ -25,12 +25,6 @@ git fetch --tags
 export ZIG_GLOBAL_CACHE_DIR="$PWD/zig-global-cache"
 export ZIG_LOCAL_CACHE_DIR="$PWD/zig-local-cache"
 
-# Test building from source without LLVM.
-cc -o bootstrap bootstrap.c
-./bootstrap
-./zig2 build -Dno-lib
-./zig-out/bin/zig test test/behavior.zig
-
 mkdir build-debug
 cd build-debug
 
@@ -65,39 +59,11 @@ stage3-debug/bin/zig build test docs \
   -fqemu \
   -fwasmtime \
   -Dstatic-llvm \
+  -Dskip-freebsd \
+  -Dskip-netbsd \
+  -Dskip-windows \
+  -Dskip-macos \
   -Dtarget=native-native-musl \
   --search-prefix "$PREFIX" \
   --zig-lib-dir "$PWD/../lib" \
   -Denable-superhtml
-
-# Ensure that updating the wasm binary from this commit will result in a viable build.
-stage3-debug/bin/zig build update-zig1
-
-mkdir ../build-new
-cd ../build-new
-
-export CC="$ZIG cc -target $TARGET -mcpu=$MCPU"
-export CXX="$ZIG c++ -target $TARGET -mcpu=$MCPU"
-
-cmake .. \
-  -DCMAKE_PREFIX_PATH="$PREFIX" \
-  -DCMAKE_BUILD_TYPE=Debug \
-  -DZIG_TARGET_TRIPLE="$TARGET" \
-  -DZIG_TARGET_MCPU="$MCPU" \
-  -DZIG_STATIC=ON \
-  -DZIG_NO_LIB=ON \
-  -GNinja
-
-unset CC
-unset CXX
-
-ninja install
-
-stage3/bin/zig test ../test/behavior.zig
-stage3/bin/zig build -p stage4 \
-  -Dstatic-llvm \
-  -Dtarget=native-native-musl \
-  -Dno-lib \
-  --search-prefix "$PREFIX" \
-  --zig-lib-dir "$PWD/../lib"
-stage4/bin/zig test ../test/behavior.zig