23 lines
912 B
LLVM
23 lines
912 B
LLVM
; RUN: opt -S -demanded-bits -analyze -enable-new-pm=0 < %s | FileCheck %s
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; RUN: opt -S -disable-output -passes="print<demanded-bits>" < %s 2>&1 | FileCheck %s
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; CHECK-DAG: DemandedBits: 0x1e for %1 = and i32 %a, 9
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; CHECK-DAG: DemandedBits: 0x1a for %2 = and i32 %b, 9
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; CHECK-DAG: DemandedBits: 0x1a for %3 = and i32 %c, 13
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; CHECK-DAG: DemandedBits: 0x1a for %4 = and i32 %d, 4
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; CHECK-DAG: DemandedBits: 0x1a for %5 = or i32 %2, %3
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; CHECK-DAG: DemandedBits: 0x1a for %6 = or i32 %4, %5
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; CHECK-DAG: DemandedBits: 0x10 for %7 = add i32 %1, %6
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; CHECK-DAG: DemandedBits: 0xffffffff for %8 = and i32 %7, 16
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define i32 @test_add(i32 %a, i32 %b, i32 %c, i32 %d) {
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%1 = and i32 %a, 9
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%2 = and i32 %b, 9
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%3 = and i32 %c, 13
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%4 = and i32 %d, 4 ; no bit of %d alive, %4 simplifies to zero
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%5 = or i32 %2, %3
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%6 = or i32 %4, %5
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%7 = add i32 %1, %6
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%8 = and i32 %7, 16
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ret i32 %8
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}
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