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49 lines
1.2 KiB
49 lines
1.2 KiB
4 months ago
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; RUN: llc < %s -fast-isel -asm-verbose=false -wasm-keep-registers | FileCheck %s
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target datalayout = "e-m:e-p:32:32-i64:64-n32:64-S128"
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target triple = "wasm32-unknown-unknown"
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; Fast-isel uses a 32-bit xor with -1 to negate i1 values, because it doesn't
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; make any guarantees about the contents of the high bits of a register holding
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; an i1 value. Test that when we do a `br_if` or `br_unless` with what what an
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; i1 value in LLVM IR, that we only test the low bit.
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; CHECK: i32.xor
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; CHECK: i32.const $push[[L0:[0-9]+]]=, 1{{$}}
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; CHECK: i32.and $push[[L1:[0-9]+]]=, $pop{{[0-9]+}}, $pop[[L0]]{{$}}
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; CHECK: br_if 0, $pop[[L1]]{{$}}
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; CHECK: i32.xor
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; CHECK: i32.const $push[[L2:[0-9]+]]=, 1{{$}}
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; CHECK: i32.and $push[[L3:[0-9]+]]=, $pop{{[0-9]+}}, $pop[[L2]]{{$}}
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; CHECK: br_if 0, $pop[[L3]]{{$}}
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define void @test() {
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start:
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%0 = call i32 @return_one()
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br label %bb1
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bb1:
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%1 = icmp eq i32 %0, 1
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%2 = xor i1 %1, true
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br i1 %2, label %bb2, label %bb3
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bb2:
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call void @panic()
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unreachable
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bb3:
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%3 = xor i1 %2, true
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br i1 %3, label %bb4, label %bb5
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bb4:
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call void @panic()
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unreachable
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bb5:
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ret void
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}
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declare i32 @return_one()
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declare void @panic()
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