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Diffstat (limited to 'test/Transforms/LoopUnroll/2011-08-08-PhiUpdate.ll')
| -rw-r--r-- | test/Transforms/LoopUnroll/2011-08-08-PhiUpdate.ll | 103 |
1 files changed, 103 insertions, 0 deletions
diff --git a/test/Transforms/LoopUnroll/2011-08-08-PhiUpdate.ll b/test/Transforms/LoopUnroll/2011-08-08-PhiUpdate.ll new file mode 100644 index 0000000..cd954c8 --- /dev/null +++ b/test/Transforms/LoopUnroll/2011-08-08-PhiUpdate.ll @@ -0,0 +1,103 @@ +; 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 +} |