1; RUN: opt -mtriple=x86_64-unknown-unknown -S -codegenprepare <%s -o - | FileCheck %s 2; 3; Ensure return instruction splitting ignores fake uses. 4; 5; IR Generated with clang -O2 -S -emit-llvm -fextend-variable-liveness test.cpp 6; 7;// test.cpp 8;extern int bar(int); 9; 10;int foo2(int i) 11;{ 12; --i; 13; if (i <= 0) 14; return -1; 15; return bar(i); 16;} 17 18declare i32 @_Z3bari(i32) local_unnamed_addr 19 20define i32 @_Z4foo2i(i32 %i) local_unnamed_addr optdebug { 21entry: 22 %dec = add nsw i32 %i, -1 23 %cmp = icmp slt i32 %i, 2 24 br i1 %cmp, label %cleanup, label %if.end 25 26if.end: ; preds = %entry 27 %call = tail call i32 @_Z3bari(i32 %dec) 28; CHECK: ret i32 %call 29 br label %cleanup 30 31cleanup: ; preds = %entry, %if.end 32; CHECK: cleanup: 33 %retval.0 = phi i32 [ %call, %if.end ], [ -1, %entry ] 34 tail call void (...) @llvm.fake.use(i32 %dec) 35; CHECK: ret i32 -1 36 ret i32 %retval.0 37} 38