forked from OSchip/llvm-project
104 lines
4.0 KiB
LLVM
104 lines
4.0 KiB
LLVM
; RUN: opt < %s -loop-unroll -S -unroll-count=4 | FileCheck %s
|
|
; Test phi update after partial unroll.
|
|
|
|
declare i1 @check() nounwind
|
|
|
|
; CHECK: @test
|
|
; CHECK: if.else:
|
|
; CHECK: if.then.loopexit
|
|
; CHECK: %sub5.lcssa = phi i32 [ %sub{{.*}}, %if.else{{.*}} ], [ %sub{{.*}}, %if.else{{.*}} ], [ %sub{{.*}}, %if.else{{.*}} ], [ %sub{{.*}}, %if.else{{.*}} ]
|
|
; CHECK: if.else.3
|
|
define void @test1(i32 %i, i32 %j) nounwind uwtable ssp {
|
|
entry:
|
|
%cond1 = call zeroext i1 @check()
|
|
br i1 %cond1, label %if.then, label %if.else.lr.ph
|
|
|
|
if.else.lr.ph: ; preds = %entry
|
|
br label %if.else
|
|
|
|
if.else: ; preds = %if.else, %if.else.lr.ph
|
|
%sub = phi i32 [ %i, %if.else.lr.ph ], [ %sub5, %if.else ]
|
|
%sub5 = sub i32 %sub, %j
|
|
%cond2 = call zeroext i1 @check()
|
|
br i1 %cond2, label %if.then, label %if.else
|
|
|
|
if.then: ; preds = %if.else, %entry
|
|
%i.tr = phi i32 [ %i, %entry ], [ %sub5, %if.else ]
|
|
ret void
|
|
|
|
}
|
|
|
|
; PR7318: assertion failure after doing a simple loop unroll
|
|
;
|
|
; CHECK: @test2
|
|
; CHECK: bb1.bb2_crit_edge:
|
|
; CHECK: %.lcssa = phi i32 [ %{{[2468]}}, %bb1{{.*}} ], [ %{{[2468]}}, %bb1{{.*}} ], [ %{{[2468]}}, %bb1{{.*}} ], [ %{{[2468]}}, %bb1{{.*}} ]
|
|
; CHECK: bb1.3:
|
|
define i32 @test2(i32* nocapture %p, i32 %n) nounwind readonly {
|
|
entry:
|
|
%0 = icmp sgt i32 %n, 0 ; <i1> [#uses=1]
|
|
br i1 %0, label %bb.nph, label %bb2
|
|
|
|
bb.nph: ; preds = %entry
|
|
%tmp = zext i32 %n to i64 ; <i64> [#uses=1]
|
|
br label %bb
|
|
|
|
bb: ; preds = %bb.nph, %bb1
|
|
%indvar = phi i64 [ 0, %bb.nph ], [ %indvar.next, %bb1 ] ; <i64> [#uses=2]
|
|
%s.01 = phi i32 [ 0, %bb.nph ], [ %2, %bb1 ] ; <i32> [#uses=1]
|
|
%scevgep = getelementptr i32* %p, i64 %indvar ; <i32*> [#uses=1]
|
|
%1 = load i32* %scevgep, align 1 ; <i32> [#uses=1]
|
|
%2 = add nsw i32 %1, %s.01 ; <i32> [#uses=2]
|
|
br label %bb1
|
|
|
|
bb1: ; preds = %bb
|
|
%indvar.next = add i64 %indvar, 1 ; <i64> [#uses=2]
|
|
%exitcond = icmp ne i64 %indvar.next, %tmp ; <i1> [#uses=1]
|
|
br i1 %exitcond, label %bb, label %bb1.bb2_crit_edge
|
|
|
|
bb1.bb2_crit_edge: ; preds = %bb1
|
|
%.lcssa = phi i32 [ %2, %bb1 ] ; <i32> [#uses=1]
|
|
br label %bb2
|
|
|
|
bb2: ; preds = %bb1.bb2_crit_edge, %entry
|
|
%s.0.lcssa = phi i32 [ %.lcssa, %bb1.bb2_crit_edge ], [ 0, %entry ] ; <i32> [#uses=1]
|
|
ret i32 %s.0.lcssa
|
|
}
|
|
|
|
; Check phi update for loop with an early-exit.
|
|
;
|
|
; CHECK: @test3
|
|
; CHECK: return.loopexit:
|
|
; CHECK: %tmp7.i.lcssa = phi i32 [ %tmp7.i{{.*}}, %land.lhs.true{{.*}} ], [ %tmp7.i{{.*}}, %land.lhs.true{{.*}} ], [ %tmp7.i{{.*}}, %land.lhs.true{{.*}} ], [ %tmp7.i{{.*}}, %land.lhs.true{{.*}} ]
|
|
; CHECK: exit.3:
|
|
define i32 @test3() nounwind uwtable ssp align 2 {
|
|
entry:
|
|
%cond1 = call zeroext i1 @check()
|
|
br i1 %cond1, label %return, label %if.end
|
|
|
|
if.end: ; preds = %entry
|
|
br label %do.body
|
|
|
|
do.body: ; preds = %do.cond, %if.end
|
|
%cond2 = call zeroext i1 @check()
|
|
br i1 %cond2, label %exit, label %do.cond
|
|
|
|
exit: ; preds = %do.body
|
|
%tmp7.i = load i32* undef, align 8
|
|
br i1 undef, label %do.cond, label %land.lhs.true
|
|
|
|
land.lhs.true: ; preds = %exit
|
|
br i1 undef, label %return, label %do.cond
|
|
|
|
do.cond: ; preds = %land.lhs.true, %exit, %do.body
|
|
%cond3 = call zeroext i1 @check()
|
|
br i1 %cond3, label %do.end, label %do.body
|
|
|
|
do.end: ; preds = %do.cond
|
|
br label %return
|
|
|
|
return: ; preds = %do.end, %land.lhs.true, %entry
|
|
%retval.0 = phi i32 [ 0, %do.end ], [ 0, %entry ], [ %tmp7.i, %land.lhs.true ]
|
|
ret i32 %retval.0
|
|
}
|