; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
; RUN: opt < %s -instcombine -S | FileCheck %s
; InstCombine should mark null-checked argument as nonnull at callsite
declare void @dummy(i32*, i32)
define void @test(i32* %a, i32 %b) {
; CHECK-LABEL: @test(
; CHECK-NEXT: entry:
; CHECK-NEXT: [[COND1:%.*]] = icmp eq i32* %a, null
; CHECK-NEXT: br i1 [[COND1]], label %dead, label %not_null
; CHECK: not_null:
; CHECK-NEXT: [[COND2:%.*]] = icmp eq i32 %b, 0
; CHECK-NEXT: br i1 [[COND2]], label %dead, label %not_zero
; CHECK: not_zero:
; CHECK-NEXT: call void @dummy(i32* nonnull %a, i32 %b)
; CHECK-NEXT: ret void
; CHECK: dead:
; CHECK-NEXT: unreachable
;
entry:
%cond1 = icmp eq i32* %a, null
br i1 %cond1, label %dead, label %not_null
not_null:
%cond2 = icmp eq i32 %b, 0
br i1 %cond2, label %dead, label %not_zero
not_zero:
call void @dummy(i32* %a, i32 %b)
ret void
dead:
unreachable
}
; The nonnull attribute in the 'bar' declaration is
; propagated to the parameters of the 'baz' callsite.
declare void @bar(i8*, i8* nonnull)
declare void @baz(i8*, i8*)
define void @deduce_nonnull_from_another_call(i8* %a, i8* %b) {
; CHECK-LABEL: @deduce_nonnull_from_another_call(
; CHECK-NEXT: call void @bar(i8* %a, i8* %b)
; CHECK-NEXT: call void @baz(i8* nonnull %b, i8* nonnull %b)
; CHECK-NEXT: ret void
;
call void @bar(i8* %a, i8* %b)
call void @baz(i8* %b, i8* %b)
ret void
}
