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