1 ; RUN: llc < %s -O0 -wasm-disable-explicit-locals -wasm-keep-registers | FileCheck %s
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.
9 target triple = "wasm32-unknown-unknown"
11 ; CHECK: i32.sub $[[BASE:[0-9]+]]=,
12 ; CHECK: local.copy $[[ARG:[0-9]+]]=, $0{{$}}
13 ; CHECK: i32.const $[[A0:[0-9]+]]=, 1{{$}}
14 ; CHECK: i32.and $[[A1:[0-9]+]]=, $[[ARG]], $[[A0]]{{$}}
15 ; CHECK: i32.store8 8($[[BASE]]), $[[A1]]{{$}}
17 define void @test(i8 %byte) {
18 %t = alloca { i8, i8 }, align 8
20 %x5 = icmp eq i8 %x4, 1
22 %x7 = icmp eq i8 %x6, 2
23 %x9 = zext i1 %x5 to i8
24 store i8 %x9, ptr %t, align 1
25 %x10 = getelementptr inbounds { i8, i8 }, ptr %t, i32 0, i32 1
26 %x11 = zext i1 %x7 to i8
27 store i8 %x11, ptr %x10, align 1