| ; RUN: opt -passes=newgvn -S < %s | FileCheck %s |
| @y = external global i32 |
| @z = external global i32 |
| |
| ; Function Attrs: nounwind ssp uwtable |
| define void @foo(i32 %x) { |
| ; CHECK: @foo(i32 %x) |
| ; CHECK: %.pre = load i32, ptr @y |
| ; CHECK: call void @bar(i32 %.pre) |
| |
| %t = sub i32 %x, %x |
| %.pre = load i32, ptr @y, align 4 |
| %cmp = icmp sgt i32 %t, 2 |
| br i1 %cmp, label %if.then, label %entry.if.end_crit_edge |
| |
| entry.if.end_crit_edge: ; preds = %entry |
| br label %if.end |
| |
| if.then: ; preds = %entry |
| %add = add nsw i32 %x, 3 |
| store i32 %add, ptr @y, align 4 |
| br label %if.end |
| |
| if.end: ; preds = %entry.if.end_crit_edge, %if.then |
| %1 = phi i32 [ %.pre, %entry.if.end_crit_edge ], [ %add, %if.then ] |
| tail call void @bar(i32 %1) |
| ret void |
| } |
| |
| define void @foo2(i32 %x) { |
| ; CHECK: @foo2(i32 %x) |
| ; CHECK: %.pre = load i32, ptr @y |
| ; CHECK: tail call void @bar(i32 %.pre) |
| entry: |
| %t = sub i32 %x, %x |
| %.pre = load i32, ptr @y, align 4 |
| %cmp = icmp sgt i32 %t, 2 |
| br i1 %cmp, label %if.then, label %if.else |
| |
| if.then: ; preds = %entry |
| %add = add nsw i32 %x, 3 |
| store i32 %add, ptr @y, align 4 |
| br label %if.end |
| |
| if.else: ; preds = %entry |
| store i32 1, ptr @z, align 4 |
| br label %if.end |
| |
| if.end: ; preds = %if.else, %if.then |
| %0 = phi i32 [ %.pre, %if.else ], [ %add, %if.then ] |
| tail call void @bar(i32 %0) |
| ret void |
| } |
| |
| declare void @bar(i32) |