| ; RUN: opt -gvn %s -S | FileCheck %s |
| ; PR42605. Check phi-translate won't translate the value number of a call |
| ; to the value of another call with clobber in between. |
| target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128" |
| target triple = "x86_64-unknown-linux-gnu" |
| |
| @global = dso_local local_unnamed_addr global i32 0, align 4 |
| @.str = private unnamed_addr constant [8 x i8] c"%d, %d\0A\00", align 1 |
| |
| ; Function Attrs: nofree nounwind |
| declare dso_local i32 @printf(i8* nocapture readonly, ...) local_unnamed_addr |
| |
| ; Function Attrs: noinline norecurse nounwind readonly uwtable |
| define dso_local i32 @_Z3gooi(i32 %i) local_unnamed_addr #0 { |
| entry: |
| %t0 = load i32, i32* @global, align 4, !tbaa !2 |
| %add = add nsw i32 %t0, %i |
| ret i32 %add |
| } |
| |
| ; Function Attrs: nofree nounwind uwtable |
| define dso_local void @noclobber() local_unnamed_addr { |
| entry: |
| %call = tail call i32 @_Z3gooi(i32 2) |
| %add = add nsw i32 %call, 5 |
| %cmp = icmp sgt i32 %add, 2 |
| br i1 %cmp, label %if.then, label %if.end |
| |
| if.then: ; preds = %entry |
| %call1 = tail call i32 @_Z3gooi(i32 3) |
| %add2 = add nsw i32 %call1, 5 |
| br label %if.end |
| |
| ; Check pre happens after phitranslate. |
| ; CHECK-LABEL: @noclobber |
| ; CHECK: %add4.pre-phi = phi i32 [ %add2, %if.then ], [ %add, %entry ] |
| ; CHECK: printf(i8* getelementptr inbounds {{.*}}, i32 %add4.pre-phi) |
| |
| if.end: ; preds = %if.then, %entry |
| %i.0 = phi i32 [ 3, %if.then ], [ 2, %entry ] |
| %global2.0 = phi i32 [ %add2, %if.then ], [ %add, %entry ] |
| %call3 = tail call i32 @_Z3gooi(i32 %i.0) |
| %add4 = add nsw i32 %call3, 5 |
| %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) |
| ret void |
| } |
| |
| ; Function Attrs: nofree nounwind uwtable |
| define dso_local void @hasclobber() local_unnamed_addr { |
| entry: |
| %call = tail call i32 @_Z3gooi(i32 2) |
| %add = add nsw i32 %call, 5 |
| %cmp = icmp sgt i32 %add, 2 |
| br i1 %cmp, label %if.then, label %if.end |
| |
| if.then: ; preds = %entry |
| %call1 = tail call i32 @_Z3gooi(i32 3) |
| %add2 = add nsw i32 %call1, 5 |
| br label %if.end |
| |
| ; Check no pre happens. |
| ; CHECK-LABEL: @hasclobber |
| ; CHECK: %call3 = tail call i32 @_Z3gooi(i32 %i.0) |
| ; CHECK-NEXT: %add4 = add nsw i32 %call3, 5 |
| ; CHECK-NEXT: printf(i8* getelementptr inbounds ({{.*}}, i32 %global2.0, i32 %add4) |
| |
| if.end: ; preds = %if.then, %entry |
| %i.0 = phi i32 [ 3, %if.then ], [ 2, %entry ] |
| %global2.0 = phi i32 [ %add2, %if.then ], [ %add, %entry ] |
| store i32 5, i32* @global, align 4, !tbaa !2 |
| %call3 = tail call i32 @_Z3gooi(i32 %i.0) |
| %add4 = add nsw i32 %call3, 5 |
| %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) |
| ret void |
| } |
| |
| attributes #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" } |
| |
| !llvm.module.flags = !{!0} |
| !llvm.ident = !{!1} |
| |
| !0 = !{i32 1, !"wchar_size", i32 4} |
| !1 = !{!"clang version 10.0.0 (trunk 369798)"} |
| !2 = !{!3, !3, i64 0} |
| !3 = !{!"int", !4, i64 0} |
| !4 = !{!"omnipotent char", !5, i64 0} |
| !5 = !{!"Simple C++ TBAA"} |