26 lines
897 B
LLVM
26 lines
897 B
LLVM
; RUN: opt -S -demanded-bits -analyze < %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: 0xFF000000 for %1 = or i32 %x, 1
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; CHECK-DAG: DemandedBits: 0xFF for %2 = call i32 @llvm.bitreverse.i32(i32 %1)
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; CHECK-DAG: DemandedBits: 0xFF for %3 = trunc i32 %2 to i8
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define i8 @test_bswap(i32 %x) {
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%1 = or i32 %x, 1
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%2 = call i32 @llvm.bswap.i32(i32 %1)
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%3 = trunc i32 %2 to i8
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ret i8 %3
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}
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declare i32 @llvm.bswap.i32(i32)
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; CHECK-DAG: DemandedBits: 0xFF000000 for %1 = or i32 %x, 1
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; CHECK-DAG: DemandedBits: 0xFF for %2 = call i32 @llvm.bswap.i32(i32 %1)
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; CHECK-DAG: DemandedBits: 0xFF for %3 = trunc i32 %2 to i8
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define i8 @test_bitreverse(i32 %x) {
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%1 = or i32 %x, 1
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%2 = call i32 @llvm.bitreverse.i32(i32 %1)
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%3 = trunc i32 %2 to i8
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ret i8 %3
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}
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declare i32 @llvm.bitreverse.i32(i32)
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