| ; RUN: llc < %s -asm-verbose=false -enable-emscripten-sjlj -wasm-keep-registers | FileCheck %s |
| |
| target triple = "wasm32-unknown-unknown" |
| |
| %struct.__jmp_buf_tag = type { [6 x i32], i32, [32 x i32] } |
| |
| declare i32 @setjmp(%struct.__jmp_buf_tag*) #0 |
| declare {i32, i32} @returns_struct() |
| |
| ; Test the combination of backend legalization of large return types and the |
| ; Emscripten sjlj transformation |
| define {i32, i32} @legalized_to_sret() { |
| entry: |
| %env = alloca [1 x %struct.__jmp_buf_tag], align 16 |
| %arraydecay = getelementptr inbounds [1 x %struct.__jmp_buf_tag], [1 x %struct.__jmp_buf_tag]* %env, i32 0, i32 0 |
| %call = call i32 @setjmp(%struct.__jmp_buf_tag* %arraydecay) #0 |
| ; This is the function pointer to pass to invoke. |
| ; It needs to be the first argument (that's what we're testing here) |
| ; CHECK: i32.const $push[[FPTR:[0-9]+]]=, returns_struct |
| ; This is the sret stack region (as an offset from the stack pointer local) |
| ; CHECK: call invoke_vi, $pop[[FPTR]] |
| %ret = call {i32, i32} @returns_struct() |
| ret {i32, i32} %ret |
| } |
| |
| attributes #0 = { returns_twice } |