mirror of
https://github.com/RPCS3/llvm.git
synced 2024-12-30 16:34:03 +00:00
1e81966626
matches what llvm-gcc and clang now produce. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@106221 91177308-0d34-0410-b5e6-96231b3b80d8
130 lines
5.1 KiB
LLVM
130 lines
5.1 KiB
LLVM
; RUN: opt -loop-unswitch -verify-loop-info -verify-dom-info %s -disable-output
|
|
|
|
; Loop unswitch should be able to unswitch these loops and
|
|
; preserve LCSSA and LoopSimplify forms.
|
|
|
|
target datalayout = "e-p:32:32:32-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:32:32-f32:32:32-f64:32:32-v64:64:64-v128:128:128-a0:0:64"
|
|
target triple = "armv6-apple-darwin9"
|
|
|
|
@delim1 = external global i32 ; <i32*> [#uses=1]
|
|
@delim2 = external global i32 ; <i32*> [#uses=1]
|
|
|
|
define i32 @ineqn(i8* %s, i8* %p) nounwind readonly {
|
|
entry:
|
|
%0 = load i32* @delim1, align 4 ; <i32> [#uses=1]
|
|
%1 = load i32* @delim2, align 4 ; <i32> [#uses=1]
|
|
br label %bb8.outer
|
|
|
|
bb: ; preds = %bb8
|
|
%2 = icmp eq i8* %p_addr.0, %s ; <i1> [#uses=1]
|
|
br i1 %2, label %bb10, label %bb2
|
|
|
|
bb2: ; preds = %bb
|
|
%3 = getelementptr inbounds i8* %p_addr.0, i32 1 ; <i8*> [#uses=3]
|
|
switch i32 %ineq.0.ph, label %bb8.backedge [
|
|
i32 0, label %bb3
|
|
i32 1, label %bb6
|
|
]
|
|
|
|
bb8.backedge: ; preds = %bb6, %bb5, %bb2
|
|
br label %bb8
|
|
|
|
bb3: ; preds = %bb2
|
|
%4 = icmp eq i32 %8, %0 ; <i1> [#uses=1]
|
|
br i1 %4, label %bb8.outer.loopexit, label %bb5
|
|
|
|
bb5: ; preds = %bb3
|
|
br i1 %6, label %bb6, label %bb8.backedge
|
|
|
|
bb6: ; preds = %bb5, %bb2
|
|
%5 = icmp eq i32 %8, %1 ; <i1> [#uses=1]
|
|
br i1 %5, label %bb7, label %bb8.backedge
|
|
|
|
bb7: ; preds = %bb6
|
|
%.lcssa1 = phi i8* [ %3, %bb6 ] ; <i8*> [#uses=1]
|
|
br label %bb8.outer.backedge
|
|
|
|
bb8.outer.backedge: ; preds = %bb8.outer.loopexit, %bb7
|
|
%.lcssa2 = phi i8* [ %.lcssa1, %bb7 ], [ %.lcssa, %bb8.outer.loopexit ] ; <i8*> [#uses=1]
|
|
%ineq.0.ph.be = phi i32 [ 0, %bb7 ], [ 1, %bb8.outer.loopexit ] ; <i32> [#uses=1]
|
|
br label %bb8.outer
|
|
|
|
bb8.outer.loopexit: ; preds = %bb3
|
|
%.lcssa = phi i8* [ %3, %bb3 ] ; <i8*> [#uses=1]
|
|
br label %bb8.outer.backedge
|
|
|
|
bb8.outer: ; preds = %bb8.outer.backedge, %entry
|
|
%ineq.0.ph = phi i32 [ 0, %entry ], [ %ineq.0.ph.be, %bb8.outer.backedge ] ; <i32> [#uses=3]
|
|
%p_addr.0.ph = phi i8* [ %p, %entry ], [ %.lcssa2, %bb8.outer.backedge ] ; <i8*> [#uses=1]
|
|
%6 = icmp eq i32 %ineq.0.ph, 1 ; <i1> [#uses=1]
|
|
br label %bb8
|
|
|
|
bb8: ; preds = %bb8.outer, %bb8.backedge
|
|
%p_addr.0 = phi i8* [ %p_addr.0.ph, %bb8.outer ], [ %3, %bb8.backedge ] ; <i8*> [#uses=3]
|
|
%7 = load i8* %p_addr.0, align 1 ; <i8> [#uses=2]
|
|
%8 = sext i8 %7 to i32 ; <i32> [#uses=2]
|
|
%9 = icmp eq i8 %7, 0 ; <i1> [#uses=1]
|
|
br i1 %9, label %bb10, label %bb
|
|
|
|
bb10: ; preds = %bb8, %bb
|
|
%.0 = phi i32 [ %ineq.0.ph, %bb ], [ 0, %bb8 ] ; <i32> [#uses=1]
|
|
ret i32 %.0
|
|
}
|
|
|
|
; This is a simplified form of ineqn from above. It triggers some
|
|
; different cases in the loop-unswitch code.
|
|
|
|
define void @simplified_ineqn() nounwind readonly {
|
|
entry:
|
|
br label %bb8.outer
|
|
|
|
bb8.outer: ; preds = %bb6, %bb2, %entry
|
|
%x = phi i32 [ 0, %entry ], [ 0, %bb6 ], [ 1, %bb2 ] ; <i32> [#uses=1]
|
|
br i1 undef, label %return, label %bb2
|
|
|
|
bb2: ; preds = %bb
|
|
switch i32 %x, label %bb6 [
|
|
i32 0, label %bb8.outer
|
|
]
|
|
|
|
bb6: ; preds = %bb2
|
|
br i1 undef, label %bb8.outer, label %bb2
|
|
|
|
return: ; preds = %bb8, %bb
|
|
ret void
|
|
}
|
|
|
|
; This function requires special handling to preserve LCSSA form.
|
|
; PR4934
|
|
|
|
define void @pnp_check_irq() nounwind noredzone {
|
|
entry:
|
|
%conv56 = trunc i64 undef to i32 ; <i32> [#uses=1]
|
|
br label %while.cond.i
|
|
|
|
while.cond.i: ; preds = %while.cond.i.backedge, %entry
|
|
%call.i25 = call i8* @pci_get_device() nounwind noredzone ; <i8*> [#uses=2]
|
|
br i1 undef, label %if.then65, label %while.body.i
|
|
|
|
while.body.i: ; preds = %while.cond.i
|
|
br i1 undef, label %if.then31.i.i, label %while.cond.i.backedge
|
|
|
|
while.cond.i.backedge: ; preds = %if.then31.i.i, %while.body.i
|
|
br label %while.cond.i
|
|
|
|
if.then31.i.i: ; preds = %while.body.i
|
|
switch i32 %conv56, label %while.cond.i.backedge [
|
|
i32 14, label %if.then42.i.i
|
|
i32 15, label %if.then42.i.i
|
|
]
|
|
|
|
if.then42.i.i: ; preds = %if.then31.i.i, %if.then31.i.i
|
|
%call.i25.lcssa48 = phi i8* [ %call.i25, %if.then31.i.i ], [ %call.i25, %if.then31.i.i ] ; <i8*> [#uses=0]
|
|
unreachable
|
|
|
|
if.then65: ; preds = %while.cond.i
|
|
unreachable
|
|
}
|
|
|
|
declare i8* @pci_get_device() noredzone
|