| ; RUN: opt -simplifycfg -S < %s | FileCheck %s |
| |
| ; This load is safe to speculate, as it's from a safe offset |
| ; within an alloca. |
| |
| ; CHECK: @yes |
| ; CHECK-NOT: br |
| |
| define void @yes(i1 %c) nounwind { |
| entry: |
| %a = alloca [4 x i64*], align 8 |
| %__a.addr = getelementptr [4 x i64*]* %a, i64 0, i64 3 |
| call void @frob(i64** %__a.addr) |
| br i1 %c, label %if.then, label %if.end |
| |
| if.then: ; preds = %entry |
| br label %return |
| |
| if.end: ; preds = %entry |
| %tmp5 = load i64** %__a.addr, align 8 |
| br label %return |
| |
| return: ; preds = %if.end, %if.then |
| %storemerge = phi i64* [ undef, %if.then ], [ %tmp5, %if.end ] |
| ret void |
| } |
| |
| ; CHECK: @no0 |
| ; CHECK: br i1 %c |
| |
| define void @no0(i1 %c) nounwind { |
| entry: |
| %a = alloca [4 x i64*], align 8 |
| %__a.addr = getelementptr [4 x i64*]* %a, i64 0, i64 4 |
| call void @frob(i64** %__a.addr) |
| br i1 %c, label %if.then, label %if.end |
| |
| if.then: ; preds = %entry |
| br label %return |
| |
| if.end: ; preds = %entry |
| %tmp5 = load i64** %__a.addr, align 8 |
| br label %return |
| |
| return: ; preds = %if.end, %if.then |
| %storemerge = phi i64* [ undef, %if.then ], [ %tmp5, %if.end ] |
| ret void |
| } |
| |
| ; CHECK: @no1 |
| ; CHECK: br i1 %c |
| |
| define void @no1(i1 %c, i64 %n) nounwind { |
| entry: |
| %a = alloca [4 x i64*], align 8 |
| %__a.addr = getelementptr [4 x i64*]* %a, i64 0, i64 %n |
| call void @frob(i64** %__a.addr) |
| br i1 %c, label %if.then, label %if.end |
| |
| if.then: ; preds = %entry |
| br label %return |
| |
| if.end: ; preds = %entry |
| %tmp5 = load i64** %__a.addr, align 8 |
| br label %return |
| |
| return: ; preds = %if.end, %if.then |
| %storemerge = phi i64* [ undef, %if.then ], [ %tmp5, %if.end ] |
| ret void |
| } |
| |
| ; CHECK: @no2 |
| ; CHECK: br i1 %c |
| |
| define void @no2(i1 %c, i64 %n) nounwind { |
| entry: |
| %a = alloca [4 x i64*], align 8 |
| %__a.addr = getelementptr [4 x i64*]* %a, i64 1, i64 0 |
| call void @frob(i64** %__a.addr) |
| br i1 %c, label %if.then, label %if.end |
| |
| if.then: ; preds = %entry |
| br label %return |
| |
| if.end: ; preds = %entry |
| %tmp5 = load i64** %__a.addr, align 8 |
| br label %return |
| |
| return: ; preds = %if.end, %if.then |
| %storemerge = phi i64* [ undef, %if.then ], [ %tmp5, %if.end ] |
| ret void |
| } |
| |
| declare void @frob(i64** nocapture %p) |
