95 lines
2.7 KiB
LLVM
95 lines
2.7 KiB
LLVM
; RUN: opt -simplifycfg -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 i64*], align 8
|
|
%__a.addr = getelementptr [4 x i64*], [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*, 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-LABEL: @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*], [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*, 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-LABEL: @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*], [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*, 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-LABEL: @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*], [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*, 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)
|