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