1; RUN: llc < %s -O0 -wasm-disable-explicit-locals -wasm-keep-registers | FileCheck %s 2 3; Regression test for bug 40172. The problem was that FastISel assumed 4; that CmpInst results did not need to be zero extended because 5; WebAssembly's compare instructions always return 0 or 1. But in this 6; test case FastISel falls back to DAG ISel, which combines away the 7; comparison, invalidating FastISel's assumption. 8 9target datalayout = "e-m:e-p:32:32-i64:64-n32:64-S128" 10target triple = "wasm32-unknown-unknown" 11 12; CHECK: i32.sub $[[BASE:[0-9]+]]=, 13; CHECK: local.copy $[[ARG:[0-9]+]]=, $0{{$}} 14; CHECK: i32.const $[[A0:[0-9]+]]=, 1{{$}} 15; CHECK: i32.and $[[A1:[0-9]+]]=, $[[ARG]], $[[A0]]{{$}} 16; CHECK: i32.store8 8($[[BASE]]), $[[A1]]{{$}} 17 18define void @test(i8 %byte) { 19 %t = alloca { i8, i8 }, align 1 20 %x4 = and i8 %byte, 1 21 %x5 = icmp eq i8 %x4, 1 22 %x6 = and i8 %byte, 2 23 %x7 = icmp eq i8 %x6, 2 24 %x8 = bitcast { i8, i8 }* %t to i8* 25 %x9 = zext i1 %x5 to i8 26 store i8 %x9, i8* %x8, align 1 27 %x10 = getelementptr inbounds { i8, i8 }, { i8, i8 }* %t, i32 0, i32 1 28 %x11 = zext i1 %x7 to i8 29 store i8 %x11, i8* %x10, align 1 30 ret void 31} 32