forked from OSchip/llvm-project
35 lines
1.0 KiB
LLVM
35 lines
1.0 KiB
LLVM
; RUN: opt -S -demanded-bits -analyze < %s | FileCheck %s
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; CHECK-LABEL: 'test_mul'
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; CHECK-DAG: DemandedBits: 0xFF for %1 = add nsw i32 %a, 5
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; CHECK-DAG: DemandedBits: 0xFF for %3 = trunc i32 %2 to i8
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; CHECK-DAG: DemandedBits: 0xFF for %2 = mul nsw i32 %1, %b
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define i8 @test_mul(i32 %a, i32 %b) {
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%1 = add nsw i32 %a, 5
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%2 = mul nsw i32 %1, %b
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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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; CHECK-LABEL: 'test_icmp1'
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; CHECK-DAG: DemandedBits: 0x1 for %3 = icmp eq i32 %1, %2
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; CHECK-DAG: DemandedBits: 0xFFF for %1 = and i32 %a, 255
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; CHECK-DAG: DemandedBits: 0xFFF for %2 = shl i32 %1, 4
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define i1 @test_icmp1(i32 %a, i32 %b) {
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%1 = and i32 %a, 255
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%2 = shl i32 %1, 4
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%3 = icmp eq i32 %1, %2
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ret i1 %3
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}
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; CHECK-LABEL: 'test_icmp2'
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; CHECK-DAG: DemandedBits: 0x1 for %3 = icmp eq i32 %1, %2
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; CHECK-DAG: DemandedBits: 0xFF for %1 = and i32 %a, 255
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; CHECK-DAG: DemandedBits: 0xF for %2 = ashr i32 %1, 4
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define i1 @test_icmp2(i32 %a, i32 %b) {
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%1 = and i32 %a, 255
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%2 = ashr i32 %1, 4
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%3 = icmp eq i32 %1, %2
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ret i1 %3
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}
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