llvm-project/clang/test/Driver/wasm-toolchain-lto.c

// A basic C link command-line with optimization with known OS and LTO enabled.

// RUN: %clang -### -O2 -flto -no-canonical-prefixes -target wasm32-wasi --sysroot=/foo %s 2>&1 \
// RUN:   | FileCheck -check-prefix=LINK_OPT_KNOWN %s
// LINK_OPT_KNOWN: clang{{.*}}" "-cc1" {{.*}} "-o" "[[temp:[^"]*]]"
// LINK_OPT_KNOWN: wasm-ld{{.*}}" "-L/foo/lib/wasm32-wasi/llvm-lto/
[WebAssembly] Use wasm-opt and LTO libraries when available. When there's a wasm-opt in the PATH, run the it to optimize LLVM's output. This fixes PR43796. And, add an "llvm-lto" directory to the sysroot library search paths, so that sysroots can provide LTO-enabled system libraries. Differential Revision: https://reviews.llvm.org/D70500 2019-11-21 07:25:43 +08:00			`// A basic C link command-line with optimization with known OS and LTO enabled.`

			`// RUN: %clang -### -O2 -flto -no-canonical-prefixes -target wasm32-wasi --sysroot=/foo %s 2>&1 \`
			`// RUN: \| FileCheck -check-prefix=LINK_OPT_KNOWN %s`
			`// LINK_OPT_KNOWN: clang{{.}}" "-cc1" {{.}} "-o" "[[temp:[^"]*]]"`
			`// LINK_OPT_KNOWN: wasm-ld{{.*}}" "-L/foo/lib/wasm32-wasi/llvm-lto/`