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; RUN: opt < %s -instcombine -S | not grep call.*bswap
define i1 @test1(i16 %tmp2) {
%tmp10 = call i16 @llvm.bswap.i16( i16 %tmp2 )
%tmp = icmp eq i16 %tmp10, 1
ret i1 %tmp
}
define i1 @test2(i32 %tmp) {
%tmp34 = tail call i32 @llvm.bswap.i32( i32 %tmp )
%tmp.upgrd.1 = icmp eq i32 %tmp34, 1
ret i1 %tmp.upgrd.1
}
declare i32 @llvm.bswap.i32(i32)
define i1 @test3(i64 %tmp) {
%tmp34 = tail call i64 @llvm.bswap.i64( i64 %tmp )
%tmp.upgrd.2 = icmp eq i64 %tmp34, 1
ret i1 %tmp.upgrd.2
}
declare i64 @llvm.bswap.i64(i64)
declare i16 @llvm.bswap.i16(i16)
; rdar://5992453
; A & 255
define i32 @test4(i32 %a) nounwind {
entry:
%tmp2 = tail call i32 @llvm.bswap.i32( i32 %a )
%tmp4 = lshr i32 %tmp2, 24
ret i32 %tmp4
}
; A
define i32 @test5(i32 %a) nounwind {
entry:
%tmp2 = tail call i32 @llvm.bswap.i32( i32 %a )
%tmp4 = tail call i32 @llvm.bswap.i32( i32 %tmp2 )
ret i32 %tmp4
}
; a >> 24
define i32 @test6(i32 %a) nounwind {
entry:
%tmp2 = tail call i32 @llvm.bswap.i32( i32 %a )
%tmp4 = and i32 %tmp2, 255
ret i32 %tmp4
}
; PR5284
define i16 @test7(i32 %A) {
%B = tail call i32 @llvm.bswap.i32(i32 %A) nounwind
%C = trunc i32 %B to i16
%D = tail call i16 @llvm.bswap.i16(i16 %C) nounwind
ret i16 %D
}
define i16 @test8(i64 %A) {
%B = tail call i64 @llvm.bswap.i64(i64 %A) nounwind
%C = trunc i64 %B to i16
%D = tail call i16 @llvm.bswap.i16(i16 %C) nounwind
ret i16 %D
}
; Misc: Fold bswap(undef) to undef.
define i64 @foo() {
%a = call i64 @llvm.bswap.i64(i64 undef)
ret i64 %a
}
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