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