1 ; RUN: opt < %s -instcombine -S | grep "ret i32 %A" 2 ; RUN: opt < %s -die -S | not grep call.*llvm 3 4 define i32 @test(i32 %A) { 5 %X = or i1 false, false 6 br i1 %X, label %T, label %C 7 8 T: ; preds = %0 9 %B = add i32 %A, 1 10 br label %C 11 12 C: ; preds = %T, %0 13 %C.upgrd.1 = phi i32 [ %B, %T ], [ %A, %0 ] 14 ret i32 %C.upgrd.1 15 } 16 17 define i32* @test2(i32 %width) { 18 %tmp = call i8* @llvm.stacksave( ) 19 %tmp14 = alloca i32, i32 %width 20 ret i32* %tmp14 21 } 22 23 declare i8* @llvm.stacksave() 24 25 declare void @llvm.lifetime.start(i64, i8*) 26 declare void @llvm.lifetime.end(i64, i8*) 27 28 define void @test3() { 29 call void @llvm.lifetime.start(i64 -1, i8* undef) 30 call void @llvm.lifetime.end(i64 -1, i8* undef) 31 ret void 32 } 33 34
