1; RUN: opt -gvn %s -S | FileCheck %s 2; PR42605. Check phi-translate won't translate the value number of a call 3; to the value of another call with clobber in between. 4target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128" 5target triple = "x86_64-unknown-linux-gnu" 6 7@global = dso_local local_unnamed_addr global i32 0, align 4 8@.str = private unnamed_addr constant [8 x i8] c"%d, %d\0A\00", align 1 9 10; Function Attrs: nofree nounwind 11declare dso_local i32 @printf(i8* nocapture readonly, ...) local_unnamed_addr 12 13; Function Attrs: noinline norecurse nounwind readonly uwtable 14define dso_local i32 @_Z3gooi(i32 %i) local_unnamed_addr #0 { 15entry: 16 %t0 = load i32, i32* @global, align 4, !tbaa !2 17 %add = add nsw i32 %t0, %i 18 ret i32 %add 19} 20 21; Function Attrs: nofree nounwind uwtable 22define dso_local void @noclobber() local_unnamed_addr { 23entry: 24 %call = tail call i32 @_Z3gooi(i32 2) 25 %add = add nsw i32 %call, 5 26 %cmp = icmp sgt i32 %add, 2 27 br i1 %cmp, label %if.then, label %if.end 28 29if.then: ; preds = %entry 30 %call1 = tail call i32 @_Z3gooi(i32 3) 31 %add2 = add nsw i32 %call1, 5 32 br label %if.end 33 34; Check pre happens after phitranslate. 35; CHECK-LABEL: @noclobber 36; CHECK: %add4.pre-phi = phi i32 [ %add2, %if.then ], [ %add, %entry ] 37; CHECK: printf(i8* getelementptr inbounds {{.*}}, i32 %add4.pre-phi) 38 39if.end: ; preds = %if.then, %entry 40 %i.0 = phi i32 [ 3, %if.then ], [ 2, %entry ] 41 %global2.0 = phi i32 [ %add2, %if.then ], [ %add, %entry ] 42 %call3 = tail call i32 @_Z3gooi(i32 %i.0) 43 %add4 = add nsw i32 %call3, 5 44 %call5 = tail call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([8 x i8], [8 x i8]* @.str, i64 0, i64 0), i32 %global2.0, i32 %add4) 45 ret void 46} 47 48; Function Attrs: nofree nounwind uwtable 49define dso_local void @hasclobber() local_unnamed_addr { 50entry: 51 %call = tail call i32 @_Z3gooi(i32 2) 52 %add = add nsw i32 %call, 5 53 %cmp = icmp sgt i32 %add, 2 54 br i1 %cmp, label %if.then, label %if.end 55 56if.then: ; preds = %entry 57 %call1 = tail call i32 @_Z3gooi(i32 3) 58 %add2 = add nsw i32 %call1, 5 59 br label %if.end 60 61; Check no pre happens. 62; CHECK-LABEL: @hasclobber 63; CHECK: %call3 = tail call i32 @_Z3gooi(i32 %i.0) 64; CHECK-NEXT: %add4 = add nsw i32 %call3, 5 65; CHECK-NEXT: printf(i8* getelementptr inbounds ({{.*}}, i32 %global2.0, i32 %add4) 66 67if.end: ; preds = %if.then, %entry 68 %i.0 = phi i32 [ 3, %if.then ], [ 2, %entry ] 69 %global2.0 = phi i32 [ %add2, %if.then ], [ %add, %entry ] 70 store i32 5, i32* @global, align 4, !tbaa !2 71 %call3 = tail call i32 @_Z3gooi(i32 %i.0) 72 %add4 = add nsw i32 %call3, 5 73 %call5 = tail call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([8 x i8], [8 x i8]* @.str, i64 0, i64 0), i32 %global2.0, i32 %add4) 74 ret void 75} 76 77attributes #0 = { noinline norecurse nounwind readonly uwtable "correctly-rounded-divide-sqrt-fp-math"="false" "disable-tail-calls"="false" "frame-pointer"="none" "less-precise-fpmad"="false" "min-legal-vector-width"="0" "no-infs-fp-math"="false" "no-jump-tables"="false" "no-nans-fp-math"="false" "no-signed-zeros-fp-math"="false" "no-trapping-math"="false" "stack-protector-buffer-size"="8" "target-cpu"="x86-64" "target-features"="+cx8,+fxsr,+mmx,+sse,+sse2,+x87" "unsafe-fp-math"="false" "use-soft-float"="false" } 78 79!llvm.module.flags = !{!0} 80!llvm.ident = !{!1} 81 82!0 = !{i32 1, !"wchar_size", i32 4} 83!1 = !{!"clang version 10.0.0 (trunk 369798)"} 84!2 = !{!3, !3, i64 0} 85!3 = !{!"int", !4, i64 0} 86!4 = !{!"omnipotent char", !5, i64 0} 87!5 = !{!"Simple C++ TBAA"} 88