1; NOTE: Assertions have been autogenerated by utils/update_test_checks.py 2; RUN: opt < %s -instcombine -S | FileCheck %s 3 4; InstCombine should mark null-checked argument as nonnull at callsite 5declare void @dummy(i32*, i32) 6 7define void @test(i32* %a, i32 %b) { 8; CHECK-LABEL: @test( 9; CHECK-NEXT: entry: 10; CHECK-NEXT: [[COND1:%.*]] = icmp eq i32* %a, null 11; CHECK-NEXT: br i1 [[COND1]], label %dead, label %not_null 12; CHECK: not_null: 13; CHECK-NEXT: [[COND2:%.*]] = icmp eq i32 %b, 0 14; CHECK-NEXT: br i1 [[COND2]], label %dead, label %not_zero 15; CHECK: not_zero: 16; CHECK-NEXT: call void @dummy(i32* nonnull %a, i32 %b) 17; CHECK-NEXT: ret void 18; CHECK: dead: 19; CHECK-NEXT: unreachable 20; 21entry: 22 %cond1 = icmp eq i32* %a, null 23 br i1 %cond1, label %dead, label %not_null 24not_null: 25 %cond2 = icmp eq i32 %b, 0 26 br i1 %cond2, label %dead, label %not_zero 27not_zero: 28 call void @dummy(i32* %a, i32 %b) 29 ret void 30dead: 31 unreachable 32} 33 34; The nonnull attribute in the 'bar' declaration is 35; propagated to the parameters of the 'baz' callsite. 36 37declare void @bar(i8*, i8* nonnull) 38declare void @baz(i8*, i8*) 39 40define void @deduce_nonnull_from_another_call(i8* %a, i8* %b) { 41; CHECK-LABEL: @deduce_nonnull_from_another_call( 42; CHECK-NEXT: call void @bar(i8* %a, i8* %b) 43; CHECK-NEXT: call void @baz(i8* nonnull %b, i8* nonnull %b) 44; CHECK-NEXT: ret void 45; 46 call void @bar(i8* %a, i8* %b) 47 call void @baz(i8* %b, i8* %b) 48 ret void 49} 50 51