Index: test/CodeGen/WebAssembly/inline-asm-roundtrip.ll =================================================================== --- /dev/null +++ test/CodeGen/WebAssembly/inline-asm-roundtrip.ll @@ -0,0 +1,43 @@ +; RUN: llc < %s | llvm-mc -triple=wasm32-unknown-unknown | FileCheck --match-full-lines %s + +; Test basic inline assembly can actually be assembled by the assembler. + +; .ll code below is the result of this code run thru +; clang -target wasm32-unknown-unknown-wasm -O2 -S -emit-llvm test.c + +; int main(int argc, const char *argv[]) { +; int src = 1; +; int dst; +; asm ("i32.const\t2\n" +; "\tget_local\t%1\n" +; "\ti32.add\n" +; "\tset_local\t%0" +; : "=r" (dst) +; : "r" (src)); +; return dst != 3; +; } + +target datalayout = "e-m:e-p:32:32-i64:64-n32:64-S128" +target triple = "wasm32-unknown-unknown" + +; CHECK-LABEL: main: +; CHECK-NEXT: .param i32, i32 +; CHECK-NEXT: .local i32 +; CHECK-NEXT: i32.const 1 +; CHECK-NEXT: set_local 2 +; CHECK-NEXT: i32.const 2 +; CHECK-NEXT: get_local 2 +; CHECK-NEXT: i32.add +; CHECK-NEXT: set_local 2 +; CHECK-NEXT: get_local 2 +; CHECK-NEXT: i32.const 3 +; CHECK-NEXT: i32.ne + +define i32 @main(i32 %argc, i8** nocapture readnone %argv) #0 { +entry: + %0 = tail call i32 asm "i32.const\092\0A\09get_local\09$1\0A\09i32.add\0A\09set_local\09$0", "=r,r"(i32 1) #1 + %cmp = icmp ne i32 %0, 3 + %conv = zext i1 %cmp to i32 + ret i32 %conv +} +