1 ; Test to make sure unused llvm.invariant.start calls are not trivially eliminated 2 ; RUN: opt < %s -instcombine -S | FileCheck %s 3 4 declare void @g(i8*) 5 6 declare {}* @llvm.invariant.start(i64, i8* nocapture) nounwind readonly 7 8 define i8 @f() { 9 %a = alloca i8 ; <i8*> [#uses=4] 10 store i8 0, i8* %a 11 %i = call {}* @llvm.invariant.start(i64 1, i8* %a) ; <{}*> [#uses=0] 12 ; CHECK: call {}* @llvm.invariant.start 13 call void @g(i8* %a) 14 %r = load i8, i8* %a ; <i8> [#uses=1] 15 ret i8 %r 16 } 17
