20 lines
620 B
LLVM
20 lines
620 B
LLVM
; Tests to make sure bit counts of constants are folded
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; RUN: opt < %s -instcombine -S | grep "ret i32 19"
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; RUN: opt < %s -instcombine -S | \
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; RUN: grep -v declare | not grep llvm.ct
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declare i31 @llvm.ctpop.i31(i31 %val)
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declare i32 @llvm.cttz.i32(i32 %val, i1)
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declare i33 @llvm.ctlz.i33(i33 %val, i1)
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define i32 @test(i32 %A) {
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%c1 = call i31 @llvm.ctpop.i31(i31 12415124)
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%c2 = call i32 @llvm.cttz.i32(i32 87359874, i1 true)
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%c3 = call i33 @llvm.ctlz.i33(i33 87359874, i1 true)
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%t1 = zext i31 %c1 to i32
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%t3 = trunc i33 %c3 to i32
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%r1 = add i32 %t1, %c2
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%r2 = add i32 %r1, %t3
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ret i32 %r2
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}
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