File: simd-illegal-signext.ll

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llvm-toolchain-16 1%3A16.0.6-15~deb12u1
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; RUN: llc < %s -mattr=+simd128 | FileCheck %s

; Regression test for a crash caused by
; WebAssemblyTargetLowering::ReplaceNodeResults not being
; implemented. Since SIMD is enabled, sign_ext_inreg is custom lowered
; but the result is i16, an illegal value. This requires
; ReplaceNodeResults to resolve, but the default implementation is to
; abort.

target triple = "wasm32-unknown-emscripten"

; CHECK: i32.load8_s
; CHECK-NEXT: i32.store16
define void @foo() {
entry:
  %0 = load ptr, ptr undef, align 4
  %1 = load i32, ptr %0, align 4
  %2 = load i32, ptr undef, align 4
  %conv67 = trunc i32 %2 to i8
  %conv68 = sext i8 %conv67 to i16
  store i16 %conv68, ptr null, align 2
  ret void
}